acinclude.m4 revision 117397
1dnl 2dnl Initialize basic configure bits, set toplevel_srcdir for Makefiles. 3dnl 4dnl GLIBCPP_TOPREL_CONFIGURE 5AC_DEFUN(GLIBCPP_TOPREL_CONFIGURE, [ 6 dnl Default to --enable-multilib (this is also passed by default 7 dnl from the ubercommon-top-level configure) 8 AC_ARG_ENABLE(multilib, 9 [ --enable-multilib build hella library versions (default)], 10 [case "${enableval}" in 11 yes) multilib=yes ;; 12 no) multilib=no ;; 13 *) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;; 14 esac], [multilib=yes])dnl 15 16 # When building with srcdir == objdir, links to the source files will 17 # be created in directories within the target_subdir. We have to 18 # adjust toplevel_srcdir accordingly, so that configure finds 19 # install-sh and other auxiliary files that live in the top-level 20 # source directory. 21 if test "${srcdir}" = "."; then 22 if test -z "${with_target_subdir}"; then 23 toprel=".." 24 else 25 if test "${with_target_subdir}" != "."; then 26 toprel="${with_multisrctop}../.." 27 else 28 toprel="${with_multisrctop}.." 29 fi 30 fi 31 else 32 toprel=".." 33 fi 34 AC_CONFIG_AUX_DIR(${srcdir}/$toprel) 35 toplevel_srcdir=\${top_srcdir}/$toprel 36 AC_SUBST(toplevel_srcdir) 37]) 38 39dnl 40dnl Initialize the rest of the library configury. 41dnl 42dnl GLIBCPP_CONFIGURE 43AC_DEFUN(GLIBCPP_CONFIGURE, [ 44 # Export build and source directories. 45 # These need to be absolute paths, yet at the same time need to 46 # canonicalize only relative paths, because then amd will not unmount 47 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. 48 glibcpp_builddir=`${PWDCMD-pwd}` 49 case $srcdir in 50 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;; 51 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;; 52 esac 53 AC_SUBST(glibcpp_builddir) 54 AC_SUBST(glibcpp_srcdir) 55 56 dnl This is here just to satisfy automake. 57 ifelse(not,equal,[AC_CONFIG_AUX_DIR(..)]) 58 59 AC_PROG_AWK 60 # Will set LN_S to either 'ln -s' or 'ln'. With autoconf 2.5x, can also 61 # be 'cp -p' if linking isn't available. Uncomment the next line to 62 # force a particular method. 63 #ac_cv_prog_LN_S='cp -p' 64 AC_PROG_LN_S 65 66 # We use these options to decide which functions to include. 67 AC_ARG_WITH(target-subdir, 68 [ --with-target-subdir=SUBDIR 69 configuring in a subdirectory]) 70 AC_ARG_WITH(cross-host, 71 [ --with-cross-host=HOST configuring with a cross compiler]) 72 73 glibcpp_basedir=$srcdir/$toprel/$1/libstdc++-v3 74 AC_SUBST(glibcpp_basedir) 75 76 # Never versions of autoconf add an underscore to these functions. 77 # Prevent future problems ... 78 ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))]) 79 ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))]) 80 ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))]) 81 ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))]) 82 83 # AC_PROG_CC 84 # FIXME: We temporarily define our own version of AC_PROG_CC. This is 85 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We 86 # are probably using a cross compiler, which will not be able to fully 87 # link an executable. This is addressed in later versions of autoconf. 88 89 AC_DEFUN(LIB_AC_PROG_CC, 90 [AC_BEFORE([$0], [AC_PROG_CPP])dnl 91 dnl Fool anybody using AC_PROG_CC. 92 AC_PROVIDE([AC_PROG_CC]) 93 AC_CHECK_PROG(CC, gcc, gcc) 94 if test -z "$CC"; then 95 AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc) 96 test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH]) 97 fi 98 99 AC_PROG_CC_GNU 100 101 if test $ac_cv_prog_gcc = yes; then 102 GCC=yes 103 dnl Check whether -g works, even if CFLAGS is set, in case the package 104 dnl plays around with CFLAGS (such as to build both debugging and 105 dnl normal versions of a library), tasteless as that idea is. 106 ac_test_CFLAGS="${CFLAGS+set}" 107 ac_save_CFLAGS="$CFLAGS" 108 CFLAGS= 109 AC_PROG_CC_G 110 if test "$ac_test_CFLAGS" = set; then 111 CFLAGS="$ac_save_CFLAGS" 112 elif test $ac_cv_prog_cc_g = yes; then 113 CFLAGS="-g -O2" 114 else 115 CFLAGS="-O2" 116 fi 117 else 118 GCC= 119 test "${CFLAGS+set}" = set || CFLAGS="-g" 120 fi 121 ]) 122 123 LIB_AC_PROG_CC 124 125 # Likewise for AC_PROG_CXX. We can't just call it directly because g++ 126 # will try to link in libstdc++. 127 AC_DEFUN(LIB_AC_PROG_CXX, 128 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl 129 dnl Fool anybody using AC_PROG_CXX. 130 AC_PROVIDE([AC_PROG_CXX]) 131 # Use glibcpp_CXX so that we do not cause CXX to be cached with the 132 # flags that come in CXX while configuring libstdc++. They're different 133 # from those used for all other target libraries. If CXX is set in 134 # the environment, respect that here. 135 glibcpp_CXX=$CXX 136 AC_CHECK_PROGS(glibcpp_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc) 137 AC_SUBST(glibcpp_CXX) 138 CXX=$glibcpp_CXX 139 test -z "$glibcpp_CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH]) 140 141 AC_PROG_CXX_GNU 142 143 if test $ac_cv_prog_gxx = yes; then 144 GXX=yes 145 dnl Check whether -g works, even if CXXFLAGS is set, in case the package 146 dnl plays around with CXXFLAGS (such as to build both debugging and 147 dnl normal versions of a library), tasteless as that idea is. 148 ac_test_CXXFLAGS="${CXXFLAGS+set}" 149 ac_save_CXXFLAGS="$CXXFLAGS" 150 CXXFLAGS= 151 AC_PROG_CXX_G 152 if test "$ac_test_CXXFLAGS" = set; then 153 CXXFLAGS="$ac_save_CXXFLAGS" 154 elif test $ac_cv_prog_cxx_g = yes; then 155 CXXFLAGS="-g -O2" 156 else 157 CXXFLAGS="-O2" 158 fi 159 else 160 GXX= 161 test "${CXXFLAGS+set}" = set || CXXFLAGS="-g" 162 fi 163 ]) 164 165 LIB_AC_PROG_CXX 166 167 # For directory versioning (e.g., headers) and other variables. 168 AC_MSG_CHECKING([for GCC version number]) 169 gcc_version=`$glibcpp_CXX -dumpversion` 170 AC_MSG_RESULT($gcc_version) 171 172 # For some reason, gettext needs this. 173 AC_ISC_POSIX 174 175 AC_CHECK_TOOL(AS, as) 176 AC_CHECK_TOOL(AR, ar) 177 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 178 AC_PROG_INSTALL 179 180 AM_MAINTAINER_MODE 181 182 # We need AC_EXEEXT to keep automake happy in cygnus mode. However, 183 # at least currently, we never actually build a program, so we never 184 # need to use $(EXEEXT). Moreover, the test for EXEEXT normally 185 # fails, because we are probably configuring with a cross compiler 186 # which can't create executables. So we include AC_EXEEXT to keep 187 # automake happy, but we don't execute it, since we don't care about 188 # the result. 189 if false; then 190 # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands 191 # to nothing, so nothing would remain between `then' and `fi' if it 192 # were not for the `:' below. 193 : 194 AC_EXEEXT 195 fi 196 197 case [$]{glibcpp_basedir} in 198 /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;; 199 *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;; 200 esac 201 202 # Find platform-specific directories containing configuration info. In 203 # addition to possibly modifying the same flags, it also sets up symlinks. 204 GLIBCPP_CHECK_TARGET 205]) 206 207 208dnl 209dnl Check to see if g++ can compile this library, and if so, if any version- 210dnl specific precautions need to be taken. 211dnl 212dnl GLIBCPP_CHECK_COMPILER_VERSION 213AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [ 214if test ! -f stamp-sanity-compiler; then 215 AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3]) 216 AC_LANG_SAVE 217 AC_LANG_CPLUSPLUS 218 AC_TRY_COMPILE(, [ 219 #if __GNUC__ < 3 220 not_ok 221 #endif 222 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above])) 223 AC_LANG_RESTORE 224 AC_MSG_RESULT($gpp_satisfactory) 225 touch stamp-sanity-compiler 226fi 227]) 228 229 230dnl 231dnl Tests for newer compiler features, or features that are present in newer 232dnl compiler versions but not older compiler versions still in use, should 233dnl be placed here. 234dnl 235dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the 236dnl new inlining code or the new system_header pragma will die on -Werror. 237dnl Leave it out by default and use maint-mode to use it. 238dnl 239dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if 240dnl compiler supports it and the user has not requested debug mode. 241dnl 242dnl GLIBCPP_CHECK_COMPILER_FEATURES 243AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [ 244 # All these tests are for C++; save the language and the compiler flags. 245 # The CXXFLAGS thing is suspicious, but based on similar bits previously 246 # found in GLIBCPP_CONFIGURE. 247 AC_LANG_SAVE 248 AC_LANG_CPLUSPLUS 249 ac_test_CXXFLAGS="${CXXFLAGS+set}" 250 ac_save_CXXFLAGS="$CXXFLAGS" 251 252 # Check for maintainer-mode bits. 253 if test x"$USE_MAINTAINER_MODE" = xno; then 254 WERROR='' 255 else 256 WERROR='-Werror' 257 fi 258 259 # Check for -ffunction-sections -fdata-sections 260 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections]) 261 CXXFLAGS='-Werror -ffunction-sections -fdata-sections' 262 AC_TRY_COMPILE(, [int foo; 263 ], [ac_fdsections=yes], [ac_fdsections=no]) 264 if test "$ac_test_CXXFLAGS" = set; then 265 CXXFLAGS="$ac_save_CXXFLAGS" 266 else 267 # this is the suspicious part 268 CXXFLAGS='' 269 fi 270 if test x"$ac_fdsections" = x"yes"; then 271 SECTION_FLAGS='-ffunction-sections -fdata-sections' 272 fi 273 AC_MSG_RESULT($ac_fdsections) 274 275 AC_LANG_RESTORE 276 AC_SUBST(WERROR) 277 AC_SUBST(SECTION_FLAGS) 278]) 279 280 281dnl 282dnl If GNU ld is in use, check to see if tricky linker opts can be used. If 283dnl the native linker is in use, all variables will be defined to something 284dnl safe (like an empty string). 285dnl 286dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible. 287dnl Define OPT_LDFLAGS='-Wl,-O1' if possible. 288dnl Define LD, with_gnu_ld, and (possibly) glibcpp_gnu_ld_version as 289dnl side-effects of testing. 290dnl 291dnl GLIBCPP_CHECK_LINKER_FEATURES 292AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [ 293 # If we're not using GNU ld, then there's no point in even trying these 294 # tests. Check for that first. We should have already tested for gld 295 # by now (in libtool), but require it now just to be safe... 296 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' 297 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' 298 AC_REQUIRE([AC_PROG_LD]) 299 300 # The name set by libtool depends on the version of libtool. Shame on us 301 # for depending on an impl detail, but c'est la vie. Older versions used 302 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on 303 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually 304 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't 305 # set (hence we're using an older libtool), then set it. 306 if test x${with_gnu_ld+set} != xset; then 307 if test x${ac_cv_prog_gnu_ld+set} != xset; then 308 # We got through "ac_require(ac_prog_ld)" and still not set? Huh? 309 with_gnu_ld=no 310 else 311 with_gnu_ld=$ac_cv_prog_gnu_ld 312 fi 313 fi 314 315 # Start by getting the version number. I think the libtool test already 316 # does some of this, but throws away the result. 317 changequote(,) 318 ldver=`$LD --version 2>/dev/null | head -1 | \ 319 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'` 320 changequote([,]) 321 glibcpp_gnu_ld_version=`echo $ldver | \ 322 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` 323 324 # Set --gc-sections. 325 if test "$with_gnu_ld" = "notbroken"; then 326 # GNU ld it is! Joy and bunny rabbits! 327 328 # All these tests are for C++; save the language and the compiler flags. 329 # Need to do this so that g++ won't try to link in libstdc++ 330 ac_test_CFLAGS="${CFLAGS+set}" 331 ac_save_CFLAGS="$CFLAGS" 332 CFLAGS='-x c++ -Wl,--gc-sections' 333 334 # Check for -Wl,--gc-sections 335 # XXX This test is broken at the moment, as symbols required for 336 # linking are now in libsupc++ (not built yet.....). In addition, 337 # this test has cored on solaris in the past. In addition, 338 # --gc-sections doesn't really work at the moment (keeps on discarding 339 # used sections, first .eh_frame and now some of the glibc sections for 340 # iconv). Bzzzzt. Thanks for playing, maybe next time. 341 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) 342 AC_TRY_RUN([ 343 int main(void) 344 { 345 try { throw 1; } 346 catch (...) { }; 347 return 0; 348 } 349 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes]) 350 if test "$ac_test_CFLAGS" = set; then 351 CFLAGS="$ac_save_CFLAGS" 352 else 353 # this is the suspicious part 354 CFLAGS='' 355 fi 356 if test "$ac_sectionLDflags" = "yes"; then 357 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" 358 fi 359 AC_MSG_RESULT($ac_sectionLDflags) 360 fi 361 362 # Set linker optimization flags. 363 if test x"$with_gnu_ld" = x"yes"; then 364 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" 365 fi 366 367 AC_SUBST(SECTION_LDFLAGS) 368 AC_SUBST(OPT_LDFLAGS) 369]) 370 371 372dnl 373dnl Check to see if the (math function) argument passed is 374dnl declared when using the c++ compiler 375dnl ASSUMES argument is a math function with ONE parameter 376dnl 377dnl GLIBCPP_CHECK_MATH_DECL_1 378AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [ 379 AC_MSG_CHECKING([for $1 declaration]) 380 if test x${glibcpp_cv_func_$1_use+set} != xset; then 381 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [ 382 AC_LANG_SAVE 383 AC_LANG_CPLUSPLUS 384 AC_TRY_COMPILE([#include <math.h> 385 #ifdef HAVE_IEEEFP_H 386 #include <ieeefp.h> 387 #endif 388 ], 389 [ $1(0);], 390 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no]) 391 AC_LANG_RESTORE 392 ]) 393 fi 394 AC_MSG_RESULT($glibcpp_cv_func_$1_use) 395]) 396 397dnl 398dnl Check to see if the (math function) argument passed is 399dnl 1) declared when using the c++ compiler 400dnl 2) has "C" linkage 401dnl 3) if not, see if 1) and 2) for argument prepended with '_' 402dnl 403dnl Define HAVE_CARGF etc if "cargf" is declared and links 404dnl 405dnl argument 1 is name of function to check 406dnl 407dnl ASSUMES argument is a math function with ONE parameter 408dnl 409dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1 410AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [ 411 GLIBCPP_CHECK_MATH_DECL_1($1) 412 if test x$glibcpp_cv_func_$1_use = x"yes"; then 413 AC_CHECK_FUNCS($1) 414 else 415 GLIBCPP_CHECK_MATH_DECL_1(_$1) 416 if test x$glibcpp_cv_func__$1_use = x"yes"; then 417 AC_CHECK_FUNCS(_$1) 418 fi 419 fi 420]) 421 422 423dnl 424dnl Like GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of 425dnl of functions at once. It's an all-or-nothing check -- either 426dnl HAVE_XYZ is defined for each of the functions, or for none of them. 427dnl Doing it this way saves significant configure time. 428AC_DEFUN(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [ 429 AC_MSG_CHECKING([for $1 functions]) 430 AC_CACHE_VAL(glibcpp_cv_func_$2_use, [ 431 AC_LANG_SAVE 432 AC_LANG_CPLUSPLUS 433 AC_TRY_COMPILE([#include <math.h>], 434 [ `for x in $3; do echo "$x (0);"; done` ], 435 [glibcpp_cv_func_$2_use=yes], 436 [glibcpp_cv_func_$2_use=no]) 437 AC_LANG_RESTORE]) 438 AC_MSG_RESULT($glibcpp_cv_func_$2_use) 439 if test x$glibcpp_cv_func_$2_use = x"yes"; then 440 AC_CHECK_FUNCS($3) 441 fi 442]) 443 444dnl 445dnl Check to see if the (math function) argument passed is 446dnl declared when using the c++ compiler 447dnl ASSUMES argument is a math function with TWO parameters 448dnl 449dnl GLIBCPP_CHECK_MATH_DECL_2 450AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [ 451 AC_MSG_CHECKING([for $1 declaration]) 452 if test x${glibcpp_cv_func_$1_use+set} != xset; then 453 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [ 454 AC_LANG_SAVE 455 AC_LANG_CPLUSPLUS 456 AC_TRY_COMPILE([#include <math.h>], 457 [ $1(0, 0);], 458 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no]) 459 AC_LANG_RESTORE 460 ]) 461 fi 462 AC_MSG_RESULT($glibcpp_cv_func_$1_use) 463]) 464 465dnl 466dnl Check to see if the (math function) argument passed is 467dnl 1) declared when using the c++ compiler 468dnl 2) has "C" linkage 469dnl 470dnl Define HAVE_CARGF etc if "cargf" is declared and links 471dnl 472dnl argument 1 is name of function to check 473dnl 474dnl ASSUMES argument is a math function with TWO parameters 475dnl 476dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2 477AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [ 478 GLIBCPP_CHECK_MATH_DECL_2($1) 479 if test x$glibcpp_cv_func_$1_use = x"yes"; then 480 AC_CHECK_FUNCS($1) 481 else 482 GLIBCPP_CHECK_MATH_DECL_2(_$1) 483 if test x$glibcpp_cv_func__$1_use = x"yes"; then 484 AC_CHECK_FUNCS(_$1) 485 fi 486 fi 487]) 488 489 490dnl 491dnl Check to see if the (math function) argument passed is 492dnl declared when using the c++ compiler 493dnl ASSUMES argument is a math function with THREE parameters 494dnl 495dnl GLIBCPP_CHECK_MATH_DECL_3 496AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [ 497 AC_MSG_CHECKING([for $1 declaration]) 498 if test x${glibcpp_cv_func_$1_use+set} != xset; then 499 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [ 500 AC_LANG_SAVE 501 AC_LANG_CPLUSPLUS 502 AC_TRY_COMPILE([#include <math.h>], 503 [ $1(0, 0, 0);], 504 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no]) 505 AC_LANG_RESTORE 506 ]) 507 fi 508 AC_MSG_RESULT($glibcpp_cv_func_$1_use) 509]) 510 511dnl 512dnl Check to see if the (math function) argument passed is 513dnl 1) declared when using the c++ compiler 514dnl 2) has "C" linkage 515dnl 516dnl Define HAVE_CARGF etc if "cargf" is declared and links 517dnl 518dnl argument 1 is name of function to check 519dnl 520dnl ASSUMES argument is a math function with THREE parameters 521dnl 522dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3 523AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [ 524 GLIBCPP_CHECK_MATH_DECL_3($1) 525 if test x$glibcpp_cv_func_$1_use = x"yes"; then 526 AC_CHECK_FUNCS($1) 527 else 528 GLIBCPP_CHECK_MATH_DECL_3(_$1) 529 if test x$glibcpp_cv_func__$1_use = x"yes"; then 530 AC_CHECK_FUNCS(_$1) 531 fi 532 fi 533]) 534 535 536dnl 537dnl Check to see if the (stdlib function) argument passed is 538dnl 1) declared when using the c++ compiler 539dnl 2) has "C" linkage 540dnl 541dnl argument 1 is name of function to check 542dnl 543dnl ASSUMES argument is a math function with TWO parameters 544dnl 545dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2 546AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [ 547 AC_MSG_CHECKING([for $1 declaration]) 548 if test x${glibcpp_cv_func_$1_use+set} != xset; then 549 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [ 550 AC_LANG_SAVE 551 AC_LANG_CPLUSPLUS 552 AC_TRY_COMPILE([#include <stdlib.h>], 553 [ $1(0, 0);], 554 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no]) 555 AC_LANG_RESTORE 556 ]) 557 fi 558 AC_MSG_RESULT($glibcpp_cv_func_$1_use) 559 if test x$glibcpp_cv_func_$1_use = x"yes"; then 560 AC_CHECK_FUNCS($1) 561 fi 562]) 563 564 565dnl 566dnl Check to see if the (stdlib function) argument passed is 567dnl 1) declared when using the c++ compiler 568dnl 2) has "C" linkage 569dnl 570dnl argument 1 is name of function to check 571dnl 572dnl ASSUMES argument is a function with THREE parameters 573dnl 574dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3 575AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3, [ 576 AC_MSG_CHECKING([for $1 declaration]) 577 if test x${glibcpp_cv_func_$1_use+set} != xset; then 578 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [ 579 AC_LANG_SAVE 580 AC_LANG_CPLUSPLUS 581 AC_TRY_COMPILE([#include <stdlib.h>], 582 [ $1(0, 0, 0);], 583 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no]) 584 AC_LANG_RESTORE 585 ]) 586 fi 587 AC_MSG_RESULT($glibcpp_cv_func_$1_use) 588 if test x$glibcpp_cv_func_$1_use = x"yes"; then 589 AC_CHECK_FUNCS($1) 590 fi 591]) 592 593dnl 594dnl Check to see if the (unistd function) argument passed is 595dnl 1) declared when using the c++ compiler 596dnl 2) has "C" linkage 597dnl 598dnl argument 1 is name of function to check 599dnl 600dnl ASSUMES argument is a function with ONE parameter 601dnl 602dnl GLIBCPP_CHECK_UNISTD_DECL_AND_LINKAGE_1 603AC_DEFUN(GLIBCPP_CHECK_UNISTD_DECL_AND_LINKAGE_1, [ 604 AC_MSG_CHECKING([for $1 declaration]) 605 if test x${glibcpp_cv_func_$1_use+set} != xset; then 606 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [ 607 AC_LANG_SAVE 608 AC_LANG_CPLUSPLUS 609 AC_TRY_COMPILE([#include <unistd.h>], 610 [ $1(0);], 611 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no]) 612 AC_LANG_RESTORE 613 ]) 614 fi 615 AC_MSG_RESULT($glibcpp_cv_func_$1_use) 616 if test x$glibcpp_cv_func_$1_use = x"yes"; then 617 AC_CHECK_FUNCS($1) 618 fi 619]) 620 621dnl 622dnl Because the builtins are picky picky picky about the arguments they take, 623dnl do an explict linkage tests here. 624dnl Check to see if the (math function) argument passed is 625dnl 1) declared when using the c++ compiler 626dnl 2) has "C" linkage 627dnl 628dnl Define HAVE_CARGF etc if "cargf" is declared and links 629dnl 630dnl argument 1 is name of function to check 631dnl 632dnl ASSUMES argument is a math function with ONE parameter 633dnl 634dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1 635AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [ 636 AC_MSG_CHECKING([for $1 declaration]) 637 if test x${glibcpp_cv_func_$1_use+set} != xset; then 638 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [ 639 AC_LANG_SAVE 640 AC_LANG_CPLUSPLUS 641 AC_TRY_COMPILE([#include <math.h>], 642 [ $1(0);], 643 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no]) 644 AC_LANG_RESTORE 645 ]) 646 fi 647 AC_MSG_RESULT($glibcpp_cv_func_$1_use) 648 if test x$glibcpp_cv_func_$1_use = x"yes"; then 649 AC_MSG_CHECKING([for $1 linkage]) 650 if test x${glibcpp_cv_func_$1_link+set} != xset; then 651 AC_CACHE_VAL(glibcpp_cv_func_$1_link, [ 652 AC_TRY_LINK([#include <math.h>], 653 [ $1(0);], 654 [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no]) 655 ]) 656 fi 657 AC_MSG_RESULT($glibcpp_cv_func_$1_link) 658 if test x$glibcpp_cv_func_$1_link = x"yes"; then 659 ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'` 660 AC_DEFINE_UNQUOTED(${ac_tr_func}) 661 fi 662 fi 663]) 664 665 666dnl 667dnl Check to see what builtin math functions are supported 668dnl 669dnl check for __builtin_abs 670dnl check for __builtin_fabsf 671dnl check for __builtin_fabs 672dnl check for __builtin_fabl 673dnl check for __builtin_labs 674dnl check for __builtin_sqrtf 675dnl check for __builtin_sqrtl 676dnl check for __builtin_sqrt 677dnl check for __builtin_sinf 678dnl check for __builtin_sin 679dnl check for __builtin_sinl 680dnl check for __builtin_cosf 681dnl check for __builtin_cos 682dnl check for __builtin_cosl 683dnl 684dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT 685AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [ 686 dnl Test for builtin math functions. 687 dnl These are made in gcc/c-common.c 688 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs) 689 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf) 690 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs) 691 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl) 692 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs) 693 694 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf) 695 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrt) 696 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl) 697 698 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf) 699 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin) 700 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl) 701 702 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf) 703 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos) 704 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl) 705 706 dnl There is, without a doubt, a more elegant way to have these 707 dnl names exported so that they won't be stripped out of acconfig.h by 708 dnl autoheader. I leave this as an exercise to somebody less frustrated 709 dnl than I.... please email the libstdc++ list if you can figure out a 710 dnl more elegant approach (see autoconf/acgen.m4 and specifically 711 dnl AC_CHECK_FUNC for things to steal.) 712 dummyvar=no 713 if test x$dummyvar = x"yes"; then 714 AC_DEFINE(HAVE___BUILTIN_ABS) 715 AC_DEFINE(HAVE___BUILTIN_LABS) 716 AC_DEFINE(HAVE___BUILTIN_COS) 717 AC_DEFINE(HAVE___BUILTIN_COSF) 718 AC_DEFINE(HAVE___BUILTIN_COSL) 719 AC_DEFINE(HAVE___BUILTIN_FABS) 720 AC_DEFINE(HAVE___BUILTIN_FABSF) 721 AC_DEFINE(HAVE___BUILTIN_FABSL) 722 AC_DEFINE(HAVE___BUILTIN_SIN) 723 AC_DEFINE(HAVE___BUILTIN_SINF) 724 AC_DEFINE(HAVE___BUILTIN_SINL) 725 AC_DEFINE(HAVE___BUILTIN_SQRT) 726 AC_DEFINE(HAVE___BUILTIN_SQRTF) 727 AC_DEFINE(HAVE___BUILTIN_SQRTL) 728 fi 729]) 730 731dnl 732dnl Check to see what the underlying c library is like 733dnl These checks need to do two things: 734dnl 1) make sure the name is declared when using the c++ compiler 735dnl 2) make sure the name has "C" linkage 736dnl This might seem like overkill but experience has shown that it's not... 737dnl 738dnl Define HAVE_STRTOLD if "strtold" is declared and links 739dnl Define HAVE_STRTOF if "strtof" is declared and links 740dnl Define HAVE_DRAND48 if "drand48" is declared and links 741dnl 742dnl GLIBCPP_CHECK_STDLIB_SUPPORT 743AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [ 744 ac_test_CXXFLAGS="${CXXFLAGS+set}" 745 ac_save_CXXFLAGS="$CXXFLAGS" 746 CXXFLAGS='-fno-builtin -D_GNU_SOURCE' 747 748 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold) 749 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtof) 750 AC_CHECK_FUNCS(drand48) 751 752 CXXFLAGS="$ac_save_CXXFLAGS" 753]) 754 755dnl 756dnl Check to see what the underlying c library is like 757dnl These checks need to do two things: 758dnl 1) make sure the name is declared when using the c++ compiler 759dnl 2) make sure the name has "C" linkage 760dnl This might seem like overkill but experience has shown that it's not... 761dnl 762dnl Define HAVE_ISATTY if "isatty" is declared and links 763dnl 764dnl GLIBCPP_CHECK_UNISTD_SUPPORT 765AC_DEFUN(GLIBCPP_CHECK_UNISTD_SUPPORT, [ 766 ac_test_CXXFLAGS="${CXXFLAGS+set}" 767 ac_save_CXXFLAGS="$CXXFLAGS" 768 CXXFLAGS='-fno-builtins -D_GNU_SOURCE' 769 770 GLIBCPP_CHECK_UNISTD_DECL_AND_LINKAGE_1(isatty) 771 772 CXXFLAGS="$ac_save_CXXFLAGS" 773]) 774 775dnl 776dnl Check to see what the underlying c library or math library is like. 777dnl These checks need to do two things: 778dnl 1) make sure the name is declared when using the c++ compiler 779dnl 2) make sure the name has "C" linkage 780dnl This might seem like overkill but experience has shown that it's not... 781dnl 782dnl Define HAVE_CARGF etc if "cargf" is found. 783dnl 784dnl GLIBCPP_CHECK_MATH_SUPPORT 785AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [ 786 ac_test_CXXFLAGS="${CXXFLAGS+set}" 787 ac_save_CXXFLAGS="$CXXFLAGS" 788 CXXFLAGS='-fno-builtin -D_GNU_SOURCE' 789 790 dnl Check libm 791 AC_CHECK_LIB(m, sin, libm="-lm") 792 ac_save_LIBS="$LIBS" 793 LIBS="$LIBS $libm" 794 795 dnl Check to see if certain C math functions exist. 796 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf) 797 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan) 798 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite) 799 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign) 800 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos) 801 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass) 802 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass) 803 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypot) 804 805 dnl Check to see if basic C math functions have float versions. 806 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig, 807 float_trig, 808 acosf asinf atanf \ 809 cosf sinf tanf \ 810 coshf sinhf tanhf) 811 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round, 812 float_round, 813 ceilf floorf) 814 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expf) 815 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf) 816 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff) 817 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f) 818 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf) 819 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf) 820 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf) 821 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf) 822 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf) 823 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf) 824 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f) 825 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff) 826 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf) 827 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf) 828 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf) 829 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef) 830 831 dnl Check to see if basic C math functions have long double versions. 832 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig, 833 long_double_trig, 834 acosl asinl atanl \ 835 cosl sinl tanl \ 836 coshl sinhl tanhl) 837 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round, 838 long_double_round, 839 ceill floorl) 840 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl) 841 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl) 842 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl) 843 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l) 844 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl) 845 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl) 846 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl) 847 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl) 848 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl) 849 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl) 850 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl) 851 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l) 852 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl) 853 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl) 854 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl) 855 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl) 856 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel) 857 858 dnl Some runtimes have these functions with a preceding underscore. Please 859 dnl keep this sync'd with the one above. And if you add any new symbol, 860 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h. 861 dnl Check to see if certain C math functions exist. 862 863 dnl Check to see if basic C math functions have float versions. 864 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig, 865 _float_trig, 866 _acosf _asinf _atanf \ 867 _cosf _sinf _tanf \ 868 _coshf _sinhf _tanhf) 869 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round, 870 _float_round, 871 _ceilf _floorf) 872 873 dnl Check to see if basic C math functions have long double versions. 874 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig, 875 _long_double_trig, 876 _acosl _asinl _atanl \ 877 _cosl _sinl _tanl \ 878 _coshl _sinhl _tanhl) 879 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round, 880 _long_double_round, 881 _ceill _floorl) 882 883 LIBS="$ac_save_LIBS" 884 CXXFLAGS="$ac_save_CXXFLAGS" 885]) 886 887 888dnl 889dnl Check to see if there is native support for complex 890dnl 891dnl Don't compile bits in math/* if native support exits. 892dnl 893dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found. 894dnl 895dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT 896AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [ 897 dnl Check for complex versions of math functions of platform. 898 AC_CHECK_LIB(m, main) 899 AC_REPLACE_MATHFUNCS(nan copysignf) 900 901 dnl For __signbit to signbit conversions. 902 AC_CHECK_FUNCS([__signbit], , [LIBMATHOBJS="$LIBMATHOBJS signbit.lo"]) 903 AC_CHECK_FUNCS([__signbitf], , [LIBMATHOBJS="$LIBMATHOBJS signbitf.lo"]) 904 905 dnl Compile the long double complex functions only if the function 906 dnl provides the non-complex long double functions that are needed. 907 dnl Currently this includes copysignl, which should be 908 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above. 909 if test x$ac_cv_func_copysignl = x"yes"; then 910 AC_CHECK_FUNCS([__signbitl], , [LIBMATHOBJS="$LIBMATHOBJS signbitl.lo"]) 911 fi 912 913 if test -n "$LIBMATHOBJS"; then 914 need_libmath=yes 915 fi 916 AC_SUBST(LIBMATHOBJS) 917 AM_CONDITIONAL(GLIBCPP_BUILD_LIBMATH, test "$need_libmath" = yes) 918]) 919 920 921dnl Check to see what architecture and operating system we are compiling 922dnl for. Also, if architecture- or OS-specific flags are required for 923dnl compilation, pick them up here. 924dnl 925dnl GLIBCPP_CHECK_TARGET 926AC_DEFUN(GLIBCPP_CHECK_TARGET, [ 927 . [$]{glibcpp_basedir}/configure.target 928 AC_MSG_RESULT(CPU config directory is $cpu_include_dir) 929 AC_MSG_RESULT(OS config directory is $os_include_dir) 930]) 931 932 933dnl 934dnl Check to see if this target can enable the wchar_t parts of libstdc++. 935dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This 936dnl must have been previously checked.) 937dnl 938dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found 939dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h 940dnl 941dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT 942AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [ 943 dnl Wide characters disabled by default. 944 enable_wchar_t=no 945 946 dnl Test wchar.h for mbstate_t, which is needed for char_traits and 947 dnl others even if wchar_t support is not on. 948 AC_MSG_CHECKING([for mbstate_t]) 949 AC_TRY_COMPILE([#include <wchar.h>], 950 [mbstate_t teststate;], 951 have_mbstate_t=yes, have_mbstate_t=no) 952 AC_MSG_RESULT($have_mbstate_t) 953 if test x"$have_mbstate_t" = xyes; then 954 AC_DEFINE(HAVE_MBSTATE_T) 955 fi 956 957 dnl Sanity check for existence of ISO C99 headers for extended encoding. 958 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no) 959 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no) 960 961 dnl Only continue checking if the ISO C99 headers exist and support is on. 962 if test x"$ac_has_wchar_h" = xyes && 963 test x"$ac_has_wctype_h" = xyes && 964 test x"$enable_c_mbchar" != xno; then 965 966 dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before 967 dnl numeric_limits can instantiate type_traits<wchar_t> 968 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX]) 969 AC_TRY_COMPILE([#include <wchar.h>], 970 [int i = WCHAR_MIN; int j = WCHAR_MAX;], 971 has_wchar_minmax=yes, has_wchar_minmax=no) 972 AC_MSG_RESULT($has_wchar_minmax) 973 974 dnl Test wchar.h for WEOF, which is what we use to determine whether 975 dnl to specialize for char_traits<wchar_t> or not. 976 AC_MSG_CHECKING([for WEOF]) 977 AC_TRY_COMPILE([ 978 #include <wchar.h> 979 #include <stddef.h>], 980 [wint_t i = WEOF;], 981 has_weof=yes, has_weof=no) 982 AC_MSG_RESULT($has_weof) 983 984 dnl Tests for wide character functions used in char_traits<wchar_t>. 985 ac_wfuncs=yes 986 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \ 987 ac_wfuncs=no) 988 989 dnl Checks for names injected into std:: by the c_std headers. 990 AC_CHECK_FUNCS(btowc wctob fgetwc fgetws fputwc fputws fwide \ 991 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \ 992 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \ 993 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \ 994 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \ 995 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \ 996 ac_wfuncs=no) 997 998 AC_MSG_CHECKING([for ISO C99 wchar_t support]) 999 if test x"$has_weof" = xyes && 1000 test x"$has_wchar_minmax" = xyes && 1001 test x"$ac_wfuncs" = xyes; then 1002 ac_isoC99_wchar_t=yes 1003 else 1004 ac_isoC99_wchar_t=no 1005 fi 1006 AC_MSG_RESULT($ac_isoC99_wchar_t) 1007 1008 dnl Use iconv for wchar_t to char conversions. As such, check for 1009 dnl X/Open Portability Guide, version 2 features (XPG2). 1010 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no) 1011 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no) 1012 1013 dnl Check for existence of libiconv.a providing XPG2 wchar_t support. 1014 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv") 1015 ac_save_LIBS="$LIBS" 1016 LIBS="$LIBS $libiconv" 1017 1018 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \ 1019 ac_XPG2funcs=yes, ac_XPG2funcs=no) 1020 1021 LIBS="$ac_save_LIBS" 1022 1023 AC_MSG_CHECKING([for XPG2 wchar_t support]) 1024 if test x"$ac_has_iconv_h" = xyes && 1025 test x"$ac_has_langinfo_h" = xyes && 1026 test x"$ac_XPG2funcs" = xyes; then 1027 ac_XPG2_wchar_t=yes 1028 else 1029 ac_XPG2_wchar_t=no 1030 fi 1031 AC_MSG_RESULT($ac_XPG2_wchar_t) 1032 1033 dnl At the moment, only enable wchar_t specializations if all the 1034 dnl above support is present. 1035 if test x"$ac_isoC99_wchar_t" = xyes && 1036 test x"$ac_XPG2_wchar_t" = xyes; then 1037 AC_DEFINE(_GLIBCPP_USE_WCHAR_T) 1038 enable_wchar_t=yes 1039 fi 1040 fi 1041 AC_MSG_CHECKING([for enabled wchar_t specializations]) 1042 AC_MSG_RESULT($enable_wchar_t) 1043 AM_CONDITIONAL(GLIBCPP_TEST_WCHAR_T, test "$enable_wchar_t" = yes) 1044]) 1045 1046 1047dnl 1048dnl Check to see if debugging libraries are to be built. 1049dnl 1050dnl GLIBCPP_ENABLE_DEBUG 1051dnl 1052dnl --enable-debug 1053dnl builds a separate set of debugging libraries in addition to the 1054dnl normal (shared, static) libstdc++ binaries. 1055dnl 1056dnl --disable-debug 1057dnl builds only one (non-debug) version of libstdc++. 1058dnl 1059dnl --enable-debug-flags=FLAGS 1060dnl iff --enable-debug == yes, then use FLAGS to build the debug library. 1061dnl 1062dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)] 1063dnl Where DEFAULT is either `yes' or `no'. If ommitted, it 1064dnl defaults to `no'. 1065AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl 1066define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl 1067AC_ARG_ENABLE(debug, 1068changequote(<<, >>)dnl 1069<< --enable-debug build extra debug library [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT], 1070changequote([, ])dnl 1071[case "${enableval}" in 1072 yes) enable_debug=yes ;; 1073 no) enable_debug=no ;; 1074 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;; 1075 esac], 1076enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl 1077AC_MSG_CHECKING([for additional debug build]) 1078AC_MSG_RESULT($enable_debug) 1079AM_CONDITIONAL(GLIBCPP_BUILD_DEBUG, test "$enable_debug" = yes) 1080]) 1081 1082 1083dnl Check for explicit debug flags. 1084dnl 1085dnl GLIBCPP_ENABLE_DEBUG_FLAGS 1086dnl 1087dnl --enable-debug-flags='-O1' 1088dnl is a general method for passing flags to be used when 1089dnl building debug libraries with --enable-debug. 1090dnl 1091dnl --disable-debug-flags does nothing. 1092dnl + Usage: GLIBCPP_ENABLE_DEBUG_FLAGS(default flags) 1093dnl If "default flags" is an empty string (or "none"), the effect is 1094dnl the same as --disable or --enable=no. 1095AC_DEFUN(GLIBCPP_ENABLE_DEBUG_FLAGS, [dnl 1096define([GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT], ifelse($1,,, $1))dnl 1097AC_ARG_ENABLE(debug_flags, 1098changequote(<<, >>)dnl 1099<< --enable-debug-flags=FLAGS pass compiler FLAGS when building debug 1100 library;[default=>>GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT], 1101changequote([, ])dnl 1102[case "${enableval}" in 1103 none) ;; 1104 -*) enable_debug_flags="${enableval}" ;; 1105 *) AC_MSG_ERROR([Unknown argument to extra debugging flags]) ;; 1106 esac], 1107enable_debug_flags=GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT)dnl 1108 1109dnl Option parsed, now set things appropriately 1110case x"$enable_debug" in 1111 xyes) 1112 case "$enable_debug_flags" in 1113 none) 1114 DEBUG_FLAGS="-g3 -O0";; 1115 -*) #valid input 1116 DEBUG_FLAGS="${enableval}" 1117 esac 1118 ;; 1119 xno) 1120 DEBUG_FLAGS="" 1121 ;; 1122esac 1123AC_SUBST(DEBUG_FLAGS) 1124 1125AC_MSG_CHECKING([for debug build flags]) 1126AC_MSG_RESULT($DEBUG_FLAGS) 1127]) 1128 1129 1130dnl 1131dnl Check for "unusual" flags to pass to the compiler while building. 1132dnl 1133dnl GLIBCPP_ENABLE_CXX_FLAGS 1134dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing 1135dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc. 1136dnl Somehow this same set of flags must be passed when [re]building 1137dnl libgcc. 1138dnl --disable-cxx-flags passes nothing. 1139dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html 1140dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html 1141dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html 1142dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags) 1143dnl If "default flags" is an empty string (or "none"), the effect is 1144dnl the same as --disable or --enable=no. 1145AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl 1146define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl 1147AC_MSG_CHECKING([for extra compiler flags for building]) 1148AC_ARG_ENABLE(cxx_flags, 1149changequote(<<, >>)dnl 1150<< --enable-cxx-flags=FLAGS pass compiler FLAGS when building library; 1151 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], 1152changequote([, ])dnl 1153[case "x$enable_cxx_flags" in 1154 xyes) 1155 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;; 1156 xno | xnone | x) 1157 enable_cxx_flags='' ;; 1158 *) 1159 enable_cxx_flags="$enableval" ;; 1160esac], 1161enable_cxx_flags=GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT) 1162 1163dnl Run through flags (either default or command-line) and set anything 1164dnl extra (e.g., #defines) that must accompany particular g++ options. 1165if test -n "$enable_cxx_flags"; then 1166 for f in $enable_cxx_flags; do 1167 case "$f" in 1168 -fhonor-std) ;; 1169 -*) ;; 1170 *) # and we're trying to pass /what/ exactly? 1171 AC_MSG_ERROR([compiler flags start with a -]) ;; 1172 esac 1173 done 1174fi 1175EXTRA_CXX_FLAGS="$enable_cxx_flags" 1176AC_MSG_RESULT($EXTRA_CXX_FLAGS) 1177AC_SUBST(EXTRA_CXX_FLAGS) 1178]) 1179 1180 1181dnl 1182dnl Check for which locale library to use: gnu or generic. 1183dnl 1184dnl GLIBCPP_ENABLE_CLOCALE 1185dnl --enable-clocale=gnu sets config/locale/c_locale_gnu.cc and friends 1186dnl --enable-clocale=generic sets config/locale/c_locale_generic.cc and friends 1187dnl 1188dnl default is generic 1189dnl 1190AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [ 1191 AC_MSG_CHECKING([for clocale to use]) 1192 AC_ARG_ENABLE(clocale, 1193 [ --enable-clocale enable model for target locale package. 1194 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic] 1195 ], 1196 if test x$enable_clocale = xno; then 1197 enable_clocale=no 1198 fi, 1199 enable_clocale=no) 1200 1201 enable_clocale_flag=$enable_clocale 1202 1203 dnl Probe for locale support if no specific model is specified. 1204 dnl Default to "generic" 1205 if test x$enable_clocale_flag = xno; then 1206 case x${target_os} in 1207 xlinux* | xgnu*) 1208 AC_EGREP_CPP([_GLIBCPP_ok], [ 1209 #include <features.h> 1210 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) 1211 _GLIBCPP_ok 1212 #endif 1213 ], enable_clocale_flag=gnu, enable_clocale_flag=generic) 1214 1215 # Test for bugs early in glibc-2.2.x series 1216 if test x$enable_clocale_flag = xgnu; then 1217 AC_TRY_RUN([ 1218 #define _GNU_SOURCE 1 1219 #include <locale.h> 1220 #include <string.h> 1221 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 1222 extern __typeof(newlocale) __newlocale; 1223 extern __typeof(duplocale) __duplocale; 1224 extern __typeof(strcoll_l) __strcoll_l; 1225 #endif 1226 int main() 1227 { 1228 const char __one[] = "�uglein Augmen"; 1229 const char __two[] = "�uglein"; 1230 int i; 1231 int j; 1232 __locale_t loc; 1233 __locale_t loc_dup; 1234 loc = __newlocale(1 << LC_ALL, "de_DE", 0); 1235 loc_dup = __duplocale(loc); 1236 i = __strcoll_l(__one, __two, loc); 1237 j = __strcoll_l(__one, __two, loc_dup); 1238 return 0; 1239 } 1240 ], 1241 [enable_clocale_flag=gnu],[enable_clocale_flag=generic], 1242 [enable_clocale_flag=generic]) 1243 fi 1244 1245 # ... at some point put __strxfrm_l tests in as well. 1246 ;; 1247 *) 1248 enable_clocale_flag=generic 1249 ;; 1250 esac 1251 fi 1252 1253 dnl Deal with gettext issues. 1254 AC_ARG_ENABLE(nls, 1255 [ --enable-nls use Native Language Support (default)], 1256 , enable_nls=yes) 1257 USE_NLS=no 1258 1259 dnl Set configure bits for specified locale package 1260 case x${enable_clocale_flag} in 1261 xgeneric) 1262 AC_MSG_RESULT(generic) 1263 1264 CLOCALE_H=config/locale/generic/c_locale.h 1265 CLOCALE_CC=config/locale/generic/c_locale.cc 1266 CCODECVT_H=config/locale/generic/codecvt_specializations.h 1267 CCODECVT_CC=config/locale/generic/codecvt_members.cc 1268 CCOLLATE_CC=config/locale/generic/collate_members.cc 1269 CCTYPE_CC=config/locale/generic/ctype_members.cc 1270 CMESSAGES_H=config/locale/generic/messages_members.h 1271 CMESSAGES_CC=config/locale/generic/messages_members.cc 1272 CMONEY_CC=config/locale/generic/monetary_members.cc 1273 CNUMERIC_CC=config/locale/generic/numeric_members.cc 1274 CTIME_H=config/locale/generic/time_members.h 1275 CTIME_CC=config/locale/generic/time_members.cc 1276 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 1277 ;; 1278 xgnu) 1279 AC_MSG_RESULT(gnu) 1280 1281 # Declare intention to use gettext, and add support for specific 1282 # languages. 1283 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT 1284 ALL_LINGUAS="de fr" 1285 1286 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. 1287 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) 1288 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then 1289 USE_NLS=yes 1290 fi 1291 # Export the build objects. 1292 for ling in $ALL_LINGUAS; do \ 1293 glibcpp_MOFILES="$glibcpp_MOFILES $ling.mo"; \ 1294 glibcpp_POFILES="$glibcpp_POFILES $ling.po"; \ 1295 done 1296 AC_SUBST(glibcpp_MOFILES) 1297 AC_SUBST(glibcpp_POFILES) 1298 1299 CLOCALE_H=config/locale/gnu/c_locale.h 1300 CLOCALE_CC=config/locale/gnu/c_locale.cc 1301 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h 1302 CCODECVT_CC=config/locale/gnu/codecvt_members.cc 1303 CCOLLATE_CC=config/locale/gnu/collate_members.cc 1304 CCTYPE_CC=config/locale/gnu/ctype_members.cc 1305 CMESSAGES_H=config/locale/gnu/messages_members.h 1306 CMESSAGES_CC=config/locale/gnu/messages_members.cc 1307 CMONEY_CC=config/locale/gnu/monetary_members.cc 1308 CNUMERIC_CC=config/locale/gnu/numeric_members.cc 1309 CTIME_H=config/locale/gnu/time_members.h 1310 CTIME_CC=config/locale/gnu/time_members.cc 1311 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h 1312 ;; 1313 xieee_1003.1-2001) 1314 AC_MSG_RESULT(generic) 1315 1316 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h 1317 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc 1318 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h 1319 CCODECVT_CC=config/locale/generic/codecvt_members.cc 1320 CCOLLATE_CC=config/locale/generic/collate_members.cc 1321 CCTYPE_CC=config/locale/generic/ctype_members.cc 1322 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h 1323 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc 1324 CMONEY_CC=config/locale/generic/monetary_members.cc 1325 CNUMERIC_CC=config/locale/generic/numeric_members.cc 1326 CTIME_H=config/locale/generic/time_members.h 1327 CTIME_CC=config/locale/generic/time_members.cc 1328 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 1329 ;; 1330 *) 1331 echo "$enable_clocale is an unknown locale package" 1>&2 1332 exit 1 1333 ;; 1334 esac 1335 1336 # This is where the testsuite looks for locale catalogs, using the 1337 # -DLOCALEDIR define during testsuite compilation. 1338 glibcpp_localedir=${glibcpp_builddir}/po/share/locale 1339 AC_SUBST(glibcpp_localedir) 1340 1341 AC_SUBST(USE_NLS) 1342 AC_SUBST(CLOCALE_H) 1343 AC_SUBST(CCODECVT_H) 1344 AC_SUBST(CMESSAGES_H) 1345 AC_SUBST(CCODECVT_CC) 1346 AC_SUBST(CCOLLATE_CC) 1347 AC_SUBST(CCTYPE_CC) 1348 AC_SUBST(CMESSAGES_CC) 1349 AC_SUBST(CMONEY_CC) 1350 AC_SUBST(CNUMERIC_CC) 1351 AC_SUBST(CTIME_H) 1352 AC_SUBST(CTIME_CC) 1353 AC_SUBST(CLOCALE_CC) 1354 AC_SUBST(CLOCALE_INTERNAL_H) 1355]) 1356 1357 1358dnl 1359dnl Check for which I/O library to use: libio, or something specific. 1360dnl 1361dnl GLIBCPP_ENABLE_CSTDIO 1362dnl --enable-cstdio=libio sets config/io/c_io_libio.h and friends 1363dnl 1364dnl default is stdio 1365dnl 1366AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [ 1367 AC_MSG_CHECKING([for cstdio to use]) 1368 AC_ARG_ENABLE(cstdio, 1369 [ --enable-cstdio enable stdio for target io package. 1370 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio] 1371 ], 1372 if test x$enable_cstdio = xno; then 1373 enable_cstdio=stdio 1374 fi, 1375 enable_cstdio=stdio) 1376 1377 enable_cstdio_flag=$enable_cstdio 1378 1379 dnl Check if a valid I/O package 1380 case x${enable_cstdio_flag} in 1381 xlibio) 1382 CSTDIO_H=config/io/c_io_libio.h 1383 BASIC_FILE_H=config/io/basic_file_libio.h 1384 BASIC_FILE_CC=config/io/basic_file_libio.cc 1385 AC_MSG_RESULT(libio) 1386 1387 # see if we are on a system with libio native (ie, linux) 1388 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no) 1389 1390 # Need to check and see what version of glibc is being used. If 1391 # it's not glibc-2.2 or higher, then we'll need to go ahead and 1392 # compile most of libio for linux systems. 1393 if test x$has_libio = x"yes"; then 1394 case "$target" in 1395 *-*-linux*) 1396 AC_MSG_CHECKING([for glibc version >= 2.2]) 1397 AC_EGREP_CPP([ok], [ 1398 #include <features.h> 1399 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) 1400 ok 1401 #endif 1402 ], glibc_satisfactory=yes, glibc_satisfactory=no) 1403 AC_MSG_RESULT($glibc_satisfactory) 1404 ;; 1405 esac 1406 1407 # XXX at the moment, admit defeat and force the recompilation 1408 # XXX of glibc even on glibc-2.2 systems, because libio is not synched. 1409 glibc_satisfactory=no 1410 1411 if test x$glibc_satisfactory = x"yes"; then 1412 need_libio=no 1413 need_wlibio=no 1414 else 1415 need_libio=yes 1416 # bkoz XXX need to add checks to enable this 1417 # pme XXX here's a first pass at such a check 1418 if test x$enable_c_mbchar != xno; then 1419 need_wlibio=yes 1420 else 1421 need_wlibio=no 1422 fi 1423 fi 1424 1425 else 1426 # Using libio, but <libio.h> doesn't exist on the target system. . . 1427 need_libio=yes 1428 # bkoz XXX need to add checks to enable this 1429 # pme XXX here's a first pass at such a check 1430 if test x$enable_c_mbchar != xno; then 1431 need_wlibio=yes 1432 else 1433 need_wlibio=no 1434 fi 1435 fi 1436 ;; 1437 xstdio | x | xno | xnone | xyes) 1438 # default 1439 CSTDIO_H=config/io/c_io_stdio.h 1440 BASIC_FILE_H=config/io/basic_file_stdio.h 1441 BASIC_FILE_CC=config/io/basic_file_stdio.cc 1442 AC_MSG_RESULT(stdio) 1443 1444 # We're not using stdio. 1445 need_libio=no 1446 need_wlibio=no 1447 ;; 1448 *) 1449 echo "$enable_cstdio is an unknown io package" 1>&2 1450 exit 1 1451 ;; 1452 esac 1453 AC_SUBST(CSTDIO_H) 1454 AC_SUBST(BASIC_FILE_H) 1455 AC_SUBST(BASIC_FILE_CC) 1456 1457 # 2000-08-04 bkoz hack 1458 CCODECVT_C=config/io/c_io_libio_codecvt.c 1459 AC_SUBST(CCODECVT_C) 1460 # 2000-08-04 bkoz hack 1461 1462 AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO, 1463 test "$need_libio" = yes || test "$need_wlibio" = yes) 1464 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes) 1465 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes) 1466 if test "$need_libio" = yes || test "$need_wlibio" = yes; then 1467 libio_la=../libio/libio.la 1468 else 1469 libio_la= 1470 fi 1471 AC_SUBST(libio_la) 1472]) 1473 1474 1475dnl 1476dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. 1477dnl We must stage the required headers so that they will be installed 1478dnl with the library (unlike libgcc, the STL implementation is provided 1479dnl solely within headers). Since we must not inject random user-space 1480dnl macro names into user-provided C++ code, we first stage into <file>-in 1481dnl and process to <file> with an output command. The reason for a two- 1482dnl stage process here is to correctly handle $srcdir!=$objdir without 1483dnl having to write complex code (the sed commands to clean the macro 1484dnl namespace are complex and fragile enough as it is). We must also 1485dnl add a relative path so that -I- is supported properly. 1486dnl 1487AC_DEFUN(GLIBCPP_ENABLE_THREADS, [ 1488 AC_MSG_CHECKING([for thread model used by GCC]) 1489 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'` 1490 AC_MSG_RESULT([$target_thread_file]) 1491 1492 if test $target_thread_file != single; then 1493 AC_DEFINE(HAVE_GTHR_DEFAULT) 1494 AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__) 1495 fi 1496 1497 glibcpp_thread_h=gthr-$target_thread_file.h 1498 AC_SUBST(glibcpp_thread_h) 1499]) 1500 1501 1502dnl 1503dnl Check for exception handling support. If an explicit enable/disable 1504dnl sjlj exceptions is given, we don't have to detect. Otherwise the 1505dnl target may or may not support call frame exceptions. 1506dnl 1507dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS 1508dnl --enable-sjlj-exceptions forces the use of builtin setjmp. 1509dnl --disable-sjlj-exceptions forces the use of call frame unwinding. 1510dnl 1511dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it. 1512dnl 1513AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [ 1514 AC_MSG_CHECKING([for exception model to use]) 1515 AC_LANG_SAVE 1516 AC_LANG_CPLUSPLUS 1517 AC_ARG_ENABLE(sjlj-exceptions, 1518 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions], 1519 [:], 1520 [dnl Botheration. Now we've got to detect the exception model. 1521 dnl Link tests against libgcc.a are problematic since -- at least 1522 dnl as of this writing -- we've not been given proper -L bits for 1523 dnl single-tree newlib and libgloss. 1524 dnl 1525 dnl This is what AC_TRY_COMPILE would do if it didn't delete the 1526 dnl conftest files before we got a change to grep them first. 1527 cat > conftest.$ac_ext << EOF 1528[#]line __oline__ "configure" 1529struct S { ~S(); }; 1530void bar(); 1531void foo() 1532{ 1533 S s; 1534 bar(); 1535} 1536EOF 1537 old_CXXFLAGS="$CXXFLAGS" 1538 CXXFLAGS=-S 1539 if AC_TRY_EVAL(ac_compile); then 1540 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then 1541 enable_sjlj_exceptions=yes 1542 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then 1543 enable_sjlj_exceptions=no 1544 fi 1545 fi 1546 CXXFLAGS="$old_CXXFLAGS" 1547 rm -f conftest*]) 1548 if test x$enable_sjlj_exceptions = xyes; then 1549 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1, 1550 [Define if the compiler is configured for setjmp/longjmp exceptions.]) 1551 ac_exception_model_name=sjlj 1552 elif test x$enable_sjlj_exceptions = xno; then 1553 ac_exception_model_name="call frame" 1554 else 1555 AC_MSG_ERROR([unable to detect exception model]) 1556 fi 1557 AC_LANG_RESTORE 1558 AC_MSG_RESULT($ac_exception_model_name) 1559]) 1560 1561 1562dnl 1563dnl Check for libunwind exception handling support. If enabled then 1564dnl we assume that the _Unwind_* functions that make up the Unwind ABI 1565dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by 1566dnl libunwind instead of libgcc and that libstdc++ has a dependency 1567dnl on libunwind as well as libgcc. 1568dnl 1569dnl GLIBCPP_ENABLE_LIBUNWIND_EXCEPTIONS 1570dnl --enable-libunwind-exceptions forces the use of libunwind. 1571dnl --disable-libunwind-exceptions assumes there is no libunwind. 1572dnl 1573dnl Define _GLIBCPP_LIBUNWIND_EXCEPTIONS if requested. 1574dnl 1575AC_DEFUN(GLIBCPP_ENABLE_LIBUNWIND_EXCEPTIONS, [ 1576 AC_MSG_CHECKING([for use of libunwind]) 1577 AC_ARG_ENABLE(libunwind-exceptions, 1578 [ --enable-libunwind-exceptions force use of libunwind for exceptions], 1579 use_libunwind_exceptions=$enableval, 1580 use_libunwind_exceptions=no) 1581 AC_MSG_RESULT($use_libunwind_exceptions) 1582 dnl Option parsed, now set things appropriately 1583 if test x"$use_libunwind_exceptions" = xyes; then 1584 LIBUNWIND_FLAG="-lunwind" 1585 else 1586 LIBUNWIND_FLAG="" 1587 fi 1588 AC_SUBST(LIBUNWIND_FLAG) 1589]) 1590 1591dnl 1592dnl Check for ISO/IEC 9899:1999 "C99" support. 1593dnl 1594dnl GLIBCPP_ENABLE_C99 1595dnl --enable-c99 defines _GLIBCPP_USE_C99 1596dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined 1597dnl + Usage: GLIBCPP_ENABLE_C99[(DEFAULT)] 1598dnl Where DEFAULT is either `yes' or `no'. If omitted, it 1599dnl defaults to `no'. 1600dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. 1601dnl 1602dnl GLIBCPP_ENABLE_C99 1603AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl 1604 define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl 1605 1606 AC_ARG_ENABLE(c99, 1607 changequote(<<, >>)dnl 1608 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT], 1609 changequote([, ])dnl 1610 [case "$enableval" in 1611 yes) enable_c99=yes ;; 1612 no) enable_c99=no ;; 1613 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;; 1614 esac], 1615 enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl 1616 1617 AC_LANG_SAVE 1618 AC_LANG_CPLUSPLUS 1619 1620 # Check for the existence of <math.h> functions used if C99 is enabled. 1621 ac_c99_math=yes; 1622 AC_MSG_CHECKING([for ISO C99 support in <math.h>]) 1623 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no]) 1624 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no]) 1625 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no]) 1626 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no]) 1627 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no]) 1628 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no]) 1629 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no]) 1630 AC_TRY_COMPILE([#include <math.h>], 1631 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no]) 1632 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no]) 1633 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no]) 1634 AC_TRY_COMPILE([#include <math.h>], 1635 [islessgreater(0.0,0.0);],, [ac_c99_math=no]) 1636 AC_TRY_COMPILE([#include <math.h>], 1637 [isunordered(0.0,0.0);],, [ac_c99_math=no]) 1638 AC_MSG_RESULT($ac_c99_math) 1639 1640 # Check for the existence in <stdio.h> of vscanf, et. al. 1641 ac_c99_stdio=yes; 1642 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>]) 1643 AC_TRY_COMPILE([#include <stdio.h>], 1644 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no]) 1645 AC_TRY_COMPILE([#include <stdio.h> 1646 #include <stdarg.h> 1647 void foo(char* fmt, ...) 1648 {va_list args; va_start(args, fmt); 1649 vfscanf(stderr, "%i", args);}], 1650 [],, [ac_c99_stdio=no]) 1651 AC_TRY_COMPILE([#include <stdio.h> 1652 #include <stdarg.h> 1653 void foo(char* fmt, ...) 1654 {va_list args; va_start(args, fmt); 1655 vscanf("%i", args);}], 1656 [],, [ac_c99_stdio=no]) 1657 AC_TRY_COMPILE([#include <stdio.h> 1658 #include <stdarg.h> 1659 void foo(char* fmt, ...) 1660 {va_list args; va_start(args, fmt); 1661 vsnprintf(fmt, 0, "%i", args);}], 1662 [],, [ac_c99_stdio=no]) 1663 AC_TRY_COMPILE([#include <stdio.h> 1664 #include <stdarg.h> 1665 void foo(char* fmt, ...) 1666 {va_list args; va_start(args, fmt); 1667 vsscanf(fmt, "%i", args);}], 1668 [],, [ac_c99_stdio=no]) 1669 AC_MSG_RESULT($ac_c99_stdio) 1670 1671 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1672 ac_c99_stdlib=yes; 1673 AC_MSG_CHECKING([for lldiv_t declaration]) 1674 AC_CACHE_VAL(ac_c99_lldiv_t, [ 1675 AC_TRY_COMPILE([#include <stdlib.h>], 1676 [ lldiv_t mydivt;], 1677 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no]) 1678 ]) 1679 AC_MSG_RESULT($ac_c99_lldiv_t) 1680 1681 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>]) 1682 AC_TRY_COMPILE([#include <stdlib.h>], 1683 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no]) 1684 AC_TRY_COMPILE([#include <stdlib.h>], 1685 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no]) 1686 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no]) 1687 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no]) 1688 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no]) 1689 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no]) 1690 if test x"$ac_c99_lldiv_t" = x"no"; then 1691 ac_c99_stdlib=no; 1692 fi; 1693 AC_MSG_RESULT($ac_c99_stdlib) 1694 1695 # Check for the existence of <wchar.h> functions used if C99 is enabled. 1696 # XXX the wchar.h checks should be rolled into the general C99 bits. 1697 ac_c99_wchar=yes; 1698 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>]) 1699 AC_TRY_COMPILE([#include <wchar.h>], 1700 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no]) 1701 AC_TRY_COMPILE([#include <wchar.h>], 1702 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no]) 1703 AC_TRY_COMPILE([#include <wchar.h>], 1704 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no]) 1705 AC_MSG_RESULT($ac_c99_wchar) 1706 1707 AC_MSG_CHECKING([for enabled ISO C99 support]) 1708 if test x"$ac_c99_math" = x"no" || 1709 test x"$ac_c99_stdio" = x"no" || 1710 test x"$ac_c99_stdlib" = x"no" || 1711 test x"$ac_c99_wchar" = x"no"; then 1712 enable_c99=no; 1713 fi; 1714 AC_MSG_RESULT($enable_c99) 1715 1716 # Option parsed, now set things appropriately 1717 if test x"$enable_c99" = x"yes"; then 1718 AC_DEFINE(_GLIBCPP_USE_C99) 1719 fi 1720 1721 AC_LANG_RESTORE 1722]) 1723 1724 1725dnl 1726dnl Check for template specializations for the 'long long' type extension. 1727dnl The result determines only whether 'long long' I/O is enabled; things 1728dnl like numeric_limits<> specializations are always available. 1729dnl 1730dnl GLIBCPP_ENABLE_LONG_LONG 1731dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG 1732dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined 1733dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)] 1734dnl Where DEFAULT is either `yes' or `no'. If omitted, it 1735dnl defaults to `no'. 1736dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'. 1737dnl 1738dnl GLIBCPP_ENABLE_LONG_LONG 1739AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl 1740 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl 1741 1742 AC_ARG_ENABLE(long-long, 1743 changequote(<<, >>)dnl 1744 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT], 1745 changequote([, ])dnl 1746 [case "$enableval" in 1747 yes) enable_long_long=yes ;; 1748 no) enable_long_long=no ;; 1749 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;; 1750 esac], 1751 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl 1752 1753 AC_LANG_SAVE 1754 AC_LANG_CPLUSPLUS 1755 1756 AC_MSG_CHECKING([for enabled long long I/O support]) 1757 # iostreams require strtoll, strtoull to compile 1758 AC_TRY_COMPILE([#include <stdlib.h>], 1759 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no]) 1760 AC_TRY_COMPILE([#include <stdlib.h>], 1761 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no]) 1762 1763 # Option parsed, now set things appropriately 1764 if test x"$enable_long_long" = xyes; then 1765 AC_DEFINE(_GLIBCPP_USE_LONG_LONG) 1766 fi 1767 AC_MSG_RESULT($enable_long_long) 1768 1769 AC_LANG_RESTORE 1770]) 1771 1772 1773dnl 1774dnl Check for what type of C headers to use. 1775dnl 1776dnl GLIBCPP_ENABLE_CHEADERS 1777dnl --enable-cheaders= [does stuff]. 1778dnl --disable-cheaders [does not do anything, really]. 1779dnl + Usage: GLIBCPP_ENABLE_CHEADERS[(DEFAULT)] 1780dnl Where DEFAULT is either `c' or `c_std'. 1781dnl If ommitted, it defaults to `c_std'. 1782AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl 1783define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl 1784AC_MSG_CHECKING([for c header strategy to use]) 1785AC_ARG_ENABLE(cheaders, 1786changequote(<<, >>)dnl 1787<< --enable-cheaders=MODEL construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT], 1788changequote([, ]) 1789 [case "$enableval" in 1790 c) 1791 enable_cheaders=c 1792 ;; 1793 c_std) 1794 enable_cheaders=c_std 1795 ;; 1796 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers]) 1797 ;; 1798 esac], 1799 enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT) 1800 AC_MSG_RESULT($enable_cheaders) 1801 1802 dnl Option parsed, now set things appropriately 1803 case "$enable_cheaders" in 1804 c_std) 1805 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c_std' 1806 ;; 1807 c) 1808 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c' 1809 ;; 1810 esac 1811 1812 AC_SUBST(C_INCLUDE_DIR) 1813 AM_CONDITIONAL(GLIBCPP_C_HEADERS_C, test "$enable_cheaders" = c) 1814 AM_CONDITIONAL(GLIBCPP_C_HEADERS_C_STD, test "$enable_cheaders" = c_std) 1815 AM_CONDITIONAL(GLIBCPP_C_HEADERS_COMPATIBILITY, test "$c_compatibility" = yes) 1816]) 1817 1818 1819dnl 1820dnl Check for wide character support. Has the same effect as the option 1821dnl in gcc's configure, but in a form that autoconf can mess with. 1822dnl 1823dnl GLIBCPP_ENABLE_C_MBCHAR 1824dnl --enable-c-mbchar requests all the wchar_t stuff. 1825dnl --disable-c-mbchar doesn't. 1826dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)] 1827dnl Where DEFAULT is either `yes' or `no'. If ommitted, it 1828dnl defaults to `no'. 1829AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl 1830define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl 1831AC_ARG_ENABLE(c-mbchar, 1832changequote(<<, >>)dnl 1833<< --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], 1834changequote([, ])dnl 1835[case "$enableval" in 1836 yes) enable_c_mbchar=yes ;; 1837 no) enable_c_mbchar=no ;; 1838 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;; 1839 esac], 1840enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl 1841dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no. 1842]) 1843 1844 1845dnl 1846dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's. 1847dnl 1848dnl TOPLEVEL_INCLUDES 1849dnl LIBMATH_INCLUDES 1850dnl LIBSUPCXX_INCLUDES 1851dnl LIBIO_INCLUDES 1852dnl 1853dnl GLIBCPP_EXPORT_INCLUDES 1854AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [ 1855 # Root level of the build directory include sources. 1856 GLIBCPP_INCLUDES="-I${glibcpp_builddir}/include/${target_alias} -I${glibcpp_builddir}/include" 1857 1858 # Passed down for canadian crosses. 1859 if test x"$CANADIAN" = xyes; then 1860 TOPLEVEL_INCLUDES='-I$(includedir)' 1861 fi 1862 1863 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath' 1864 1865 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++' 1866 1867 if test x"$need_libio" = xyes; then 1868 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio' 1869 AC_SUBST(LIBIO_INCLUDES) 1870 fi 1871 1872 # Now, export this to all the little Makefiles.... 1873 AC_SUBST(GLIBCPP_INCLUDES) 1874 AC_SUBST(TOPLEVEL_INCLUDES) 1875 AC_SUBST(LIBMATH_INCLUDES) 1876 AC_SUBST(LIBSUPCXX_INCLUDES) 1877]) 1878 1879 1880dnl 1881dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's. 1882dnl 1883AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [ 1884 # Optimization flags that are probably a good idea for thrill-seekers. Just 1885 # uncomment the lines below and make, everything else is ready to go... 1886 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc 1887 OPTIMIZE_CXXFLAGS= 1888 AC_SUBST(OPTIMIZE_CXXFLAGS) 1889 1890 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings' 1891 AC_SUBST(WARN_FLAGS) 1892]) 1893 1894dnl 1895dnl GLIBCPP_EXPORT_INSTALL_INFO 1896dnl calculates gxx_install_dir 1897dnl exports glibcpp_toolexecdir 1898dnl exports glibcpp_toolexeclibdir 1899dnl exports glibcpp_prefixdir 1900dnl 1901dnl Assumes cross_compiling bits already done, and with_cross_host in 1902dnl particular 1903dnl 1904dnl GLIBCPP_EXPORT_INSTALL_INFO 1905AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [ 1906# Assumes glibcpp_builddir, glibcpp_srcdir are alreay set up and 1907# exported correctly in GLIBCPP_CONFIGURE. 1908glibcpp_toolexecdir=no 1909glibcpp_toolexeclibdir=no 1910glibcpp_prefixdir=${prefix} 1911 1912# Process the option --with-gxx-include-dir=<path to include-files directory> 1913AC_MSG_CHECKING([for --with-gxx-include-dir]) 1914AC_ARG_WITH(gxx-include-dir, 1915[ --with-gxx-include-dir the installation directory for include files], 1916[case "${withval}" in 1917 yes) 1918 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir) 1919 gxx_include_dir=no 1920 ;; 1921 no) 1922 gxx_include_dir=no 1923 ;; 1924 *) 1925 gxx_include_dir=${withval} 1926 ;; 1927esac], [gxx_include_dir=no]) 1928AC_MSG_RESULT($gxx_include_dir) 1929 1930# Process the option "--enable-version-specific-runtime-libs" 1931AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 1932AC_ARG_ENABLE(version-specific-runtime-libs, 1933[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ], 1934[case "$enableval" in 1935 yes) version_specific_libs=yes ;; 1936 no) version_specific_libs=no ;; 1937 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 1938 esac], 1939version_specific_libs=no)dnl 1940# Option set, now we can test it. 1941AC_MSG_RESULT($version_specific_libs) 1942 1943# Default case for install directory for include files. 1944if test $version_specific_libs = no && test $gxx_include_dir = no; then 1945 gxx_include_dir='$(prefix)'/include/c++/${gcc_version} 1946fi 1947 1948# Version-specific runtime libs processing. 1949if test $version_specific_libs = yes; then 1950 # Need the gcc compiler version to know where to install libraries 1951 # and header files if --enable-version-specific-runtime-libs option 1952 # is selected. 1953 if test x"$gxx_include_dir" = x"no"; then 1954 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/c++ 1955 fi 1956 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)' 1957 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)' 1958fi 1959 1960# Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir 1961# Install a library built with a cross compiler in tooldir, not libdir. 1962if test x"$glibcpp_toolexecdir" = x"no"; then 1963 if test -n "$with_cross_host" && 1964 test x"$with_cross_host" != x"no"; then 1965 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)' 1966 glibcpp_toolexeclibdir='$(toolexecdir)/lib' 1967 else 1968 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)' 1969 glibcpp_toolexeclibdir='$(libdir)' 1970 fi 1971 glibcpp_toolexeclibdir=$glibcpp_toolexeclibdir/`$CC -print-multi-os-directory` 1972fi 1973 1974AC_MSG_CHECKING([for install location]) 1975AC_MSG_RESULT($gxx_include_dir) 1976 1977AC_SUBST(glibcpp_prefixdir) 1978AC_SUBST(gxx_include_dir) 1979AC_SUBST(glibcpp_toolexecdir) 1980AC_SUBST(glibcpp_toolexeclibdir) 1981]) 1982 1983 1984# Check for functions in math library. 1985# Ulrich Drepper <drepper@cygnus.com>, 1998. 1986# 1987# This file can be copied and used freely without restrictions. It can 1988# be used in projects which are not available under the GNU Public License 1989# but which still want to provide support for the GNU gettext functionality. 1990# Please note that the actual code is *not* freely available. 1991 1992# serial 1 1993 1994dnl AC_REPLACE_MATHFUNCS(FUNCTION...) 1995AC_DEFUN(AC_REPLACE_MATHFUNCS, 1996[AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])]) 1997 1998 1999dnl This macro searches for a GNU version of make. If a match is found, the 2000dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is 2001dnl set to "#". This is useful for including a special features in a Makefile, 2002dnl which cannot be handled by other versions of make. The variable 2003dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists, 2004dnl the empty string otherwise. 2005dnl 2006dnl Here is an example of its use: 2007dnl 2008dnl Makefile.in might contain: 2009dnl 2010dnl # A failsafe way of putting a dependency rule into a makefile 2011dnl $(DEPEND): 2012dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND) 2013dnl 2014dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND))) 2015dnl @ifGNUmake@ include $(DEPEND) 2016dnl @ifGNUmake@ endif 2017dnl 2018dnl Then configure.in would normally contain: 2019dnl 2020dnl CHECK_GNU_MAKE() 2021dnl AC_OUTPUT(Makefile) 2022dnl 2023dnl Then perhaps to cause gnu make to override any other make, we could do 2024dnl something like this (note that GNU make always looks for GNUmakefile first): 2025dnl 2026dnl if ! test x$_cv_gnu_make_command = x ; then 2027dnl mv Makefile GNUmakefile 2028dnl echo .DEFAULT: > Makefile ; 2029dnl echo \ $_cv_gnu_make_command \$@ >> Makefile; 2030dnl fi 2031dnl 2032dnl Then, if any (well almost any) other make is called, and GNU make also 2033dnl exists, then the other make wraps the GNU make. 2034dnl 2035dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au> 2036dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme 2037dnl 2038dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending 2039dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the 2040dnl #### conditional's subshell (" --version" is not a command), using a 2041dnl #### different option to grep(1). 2042dnl #### -pme 2043dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not 2044dnl #### ${MAKE:-make}). 2045dnl #### -msokolov 2046AC_DEFUN( 2047 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command, 2048 _cv_gnu_make_command='' ; 2049dnl Search all the common names for GNU make 2050 for a in "${MAKE-make}" make gmake gnumake ; do 2051 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null ) 2052 then 2053 _cv_gnu_make_command=$a ; 2054 break; 2055 fi 2056 done ; 2057 ) ; 2058dnl If there was a GNU version, then set @ifGNUmake@ to the empty 2059dnl string, '#' otherwise 2060 if test "x$_cv_gnu_make_command" != "x" ; then 2061 ifGNUmake='' ; 2062 else 2063 ifGNUmake='#' ; 2064 fi 2065 AC_SUBST(ifGNUmake) 2066]) 2067 2068 2069dnl Check for headers for, and arguments to, the setrlimit() function. 2070dnl Used only in testsuite_hooks.h. 2071AC_DEFUN(GLIBCPP_CHECK_SETRLIMIT_ancilliary, [ 2072 AC_TRY_COMPILE([#include <unistd.h> 2073 #include <sys/time.h> 2074 #include <sys/resource.h> 2075 ], [ int f = RLIMIT_$1 ; ], 2076 [glibcpp_mresult=1], [glibcpp_mresult=0]) 2077 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcpp_mresult, 2078 [Only used in build directory testsuite_hooks.h.]) 2079]) 2080AC_DEFUN(GLIBCPP_CHECK_SETRLIMIT, [ 2081 setrlimit_have_headers=yes 2082 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h, 2083 [], 2084 setrlimit_have_headers=no) 2085 # If don't have the headers, then we can't run the tests now, and we 2086 # won't be seeing any of these during testsuite compilation. 2087 if test $setrlimit_have_headers = yes; then 2088 # Can't do these in a loop, else the resulting syntax is wrong. 2089 GLIBCPP_CHECK_SETRLIMIT_ancilliary(DATA) 2090 GLIBCPP_CHECK_SETRLIMIT_ancilliary(RSS) 2091 GLIBCPP_CHECK_SETRLIMIT_ancilliary(VMEM) 2092 GLIBCPP_CHECK_SETRLIMIT_ancilliary(AS) 2093 2094 # Check for rlimit, setrlimit. 2095 AC_CACHE_VAL(ac_setrlimit, [ 2096 AC_TRY_COMPILE([#include <unistd.h> 2097 #include <sys/time.h> 2098 #include <sys/resource.h> 2099 ], 2100 [ struct rlimit r; setrlimit(0, &r);], 2101 [ac_setrlimit=yes], [ac_setrlimit=no]) 2102 ]) 2103 fi 2104 2105 AC_MSG_CHECKING([for testsuite memory limit support]) 2106 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then 2107 ac_mem_limits=yes 2108 AC_DEFINE(_GLIBCPP_MEM_LIMITS) 2109 else 2110 ac_mem_limits=no 2111 fi 2112 AC_MSG_RESULT($ac_mem_limits) 2113]) 2114 2115 2116dnl 2117dnl Does any necessary configuration of the testsuite directory. Generates 2118dnl the testsuite_hooks.h header. 2119dnl 2120dnl GLIBCPP_CONFIGURE_TESTSUITE [no args] 2121AC_DEFUN(GLIBCPP_CONFIGURE_TESTSUITE, [ 2122 if test x"$GLIBCPP_IS_CROSS_COMPILING" = xfalse; then 2123 # Do checks for memory limit functions. 2124 GLIBCPP_CHECK_SETRLIMIT 2125 2126 # Look for setenv, so that extended locale tests can be performed. 2127 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) 2128 fi 2129 2130 # Export file names for ABI checking. 2131 baseline_dir="${glibcpp_srcdir}/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)" 2132 AC_SUBST(baseline_dir) 2133 2134 # Determine if checking the ABI is desirable. 2135 if test x$enable_symvers = xno; then 2136 enable_abi_check=no 2137 else 2138 case "$host" in 2139 *-*-cygwin*) 2140 enable_abi_check=no ;; 2141 *) 2142 enable_abi_check=yes ;; 2143 esac 2144 fi 2145 AM_CONDITIONAL(GLIBCPP_TEST_ABI, test "$enable_abi_check" = yes) 2146]) 2147 2148 2149sinclude(../libtool.m4) 2150dnl The lines below arrange for aclocal not to bring an installed 2151dnl libtool.m4 into aclocal.m4, while still arranging for automake to 2152dnl add a definition of LIBTOOL to Makefile.in. 2153ifelse(,,,[AC_SUBST(LIBTOOL) 2154AC_DEFUN([AM_PROG_LIBTOOL]) 2155AC_DEFUN([AC_LIBTOOL_DLOPEN]) 2156AC_DEFUN([AC_PROG_LD]) 2157]) 2158 2159dnl 2160dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>. 2161dnl 2162 2163AC_DEFUN(GLIBCPP_CHECK_S_ISREG_OR_S_IFREG, [ 2164 AC_CACHE_VAL(glibcpp_cv_S_ISREG, [ 2165 AC_TRY_LINK([#include <sys/stat.h>], 2166 [struct stat buffer; fstat(0, &buffer); S_ISREG(buffer.st_mode); ], 2167 [glibcpp_cv_S_ISREG=yes], 2168 [glibcpp_cv_S_ISREG=no]) 2169 ]) 2170 AC_CACHE_VAL(glibcpp_cv_S_IFREG, [ 2171 AC_TRY_LINK([#include <sys/stat.h>], 2172 [struct stat buffer; fstat(0, &buffer); S_IFREG & buffer.st_mode; ], 2173 [glibcpp_cv_S_IFREG=yes], 2174 [glibcpp_cv_S_IFREG=no]) 2175 ]) 2176 if test x$glibcpp_cv_S_ISREG = xyes; then 2177 AC_DEFINE(HAVE_S_ISREG) 2178 elif test x$glibcpp_cv_S_IFREG = xyes; then 2179 AC_DEFINE(HAVE_S_IFREG) 2180 fi 2181]) 2182 2183dnl 2184dnl Check whether poll is available in <poll.h>. 2185dnl 2186 2187AC_DEFUN(GLIBCPP_CHECK_POLL, [ 2188 AC_CACHE_VAL(glibcpp_cv_POLL, [ 2189 AC_TRY_COMPILE([#include <poll.h>], 2190 [struct pollfd pfd[1]; pfd[0].events = POLLIN; poll(pfd, 1, 0); ], 2191 [glibcpp_cv_POLL=yes], 2192 [glibcpp_cv_POLL=no]) 2193 ]) 2194 if test x$glibcpp_cv_POLL = xyes; then 2195 AC_DEFINE(HAVE_POLL) 2196 fi 2197]) 2198 2199# Check whether LC_MESSAGES is available in <locale.h>. 2200# Ulrich Drepper <drepper@cygnus.com>, 1995. 2201# 2202# This file file be copied and used freely without restrictions. It can 2203# be used in projects which are not available under the GNU Public License 2204# but which still want to provide support for the GNU gettext functionality. 2205# Please note that the actual code is *not* freely available. 2206 2207# serial 1 2208 2209AC_DEFUN(AC_LC_MESSAGES, [ 2210 AC_CHECK_HEADER(locale.h, [ 2211 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, 2212 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES], 2213 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) 2214 if test $ac_cv_val_LC_MESSAGES = yes; then 2215 AC_DEFINE(HAVE_LC_MESSAGES) 2216 fi 2217 ]) 2218]) 2219 2220 2221dnl 2222dnl Check for whether the Boost-derived checks should be turned on. 2223dnl 2224dnl GLIBCPP_ENABLE_CONCEPT_CHECKS 2225dnl --enable-concept-checks turns them on. 2226dnl --disable-concept-checks leaves them off. 2227dnl + Usage: GLIBCPP_ENABLE_CONCEPT_CHECKS[(DEFAULT)] 2228dnl Where DEFAULT is either `yes' or `no'. If ommitted, it 2229dnl defaults to `no'. 2230AC_DEFUN(GLIBCPP_ENABLE_CONCEPT_CHECKS, [dnl 2231define([GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT], ifelse($1, yes, yes, no))dnl 2232AC_ARG_ENABLE(concept-checks, 2233changequote(<<, >>)dnl 2234<< --enable-concept-checks use Boost-derived template checks [default=>>GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT], 2235changequote([, ])dnl 2236[case "$enableval" in 2237 yes) enable_concept_checks=yes ;; 2238 no) enable_concept_checks=no ;; 2239 *) AC_MSG_ERROR([Unknown argument to enable/disable concept checks]) ;; 2240 esac], 2241enable_concept_checks=GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT)dnl 2242dnl Option parsed, now set things appropriately 2243if test x"$enable_concept_checks" = xyes; then 2244 AC_DEFINE(_GLIBCPP_CONCEPT_CHECKS) 2245fi 2246]) 2247 2248 2249dnl 2250dnl Add version tags to symbols in shared library (or not), additionally 2251dnl marking other symbols as private/local (or not). 2252dnl 2253dnl GLIBCPP_ENABLE_SYMVERS 2254dnl --enable-symvers=style adds a version script to the linker call when 2255dnl creating the shared library. The choice of version script is 2256dnl controlled by 'style'. 2257dnl --disable-symvers does not. 2258dnl + Usage: GLIBCPP_ENABLE_SYMVERS[(DEFAULT)] 2259dnl Where DEFAULT is either `yes' or `no'. If ommitted, it 2260dnl defaults to `no'. Passing `yes' tries to choose a default style 2261dnl based on linker characteristics. Passing 'no' disables versioning. 2262AC_DEFUN(GLIBCPP_ENABLE_SYMVERS, [dnl 2263define([GLIBCPP_ENABLE_SYMVERS_DEFAULT], ifelse($1, yes, yes, no))dnl 2264AC_ARG_ENABLE(symvers, 2265changequote(<<, >>)dnl 2266<< --enable-symvers=style enables symbol versioning of the shared library [default=>>GLIBCPP_ENABLE_SYMVERS_DEFAULT], 2267changequote([, ])dnl 2268[case "$enableval" in 2269 yes) enable_symvers=yes ;; 2270 no) enable_symvers=no ;; 2271 # other names here, just as sanity checks 2272 #gnu|sun|etcetera) enable_symvers=$enableval ;; 2273 gnu) enable_symvers=$enableval ;; 2274 *) AC_MSG_ERROR([Unknown argument to enable/disable symvers]) ;; 2275 esac], 2276enable_symvers=GLIBCPP_ENABLE_SYMVERS_DEFAULT)dnl 2277 2278# If we never went through the GLIBCPP_CHECK_LINKER_FEATURES macro, then we 2279# don't know enough about $LD to do tricks... 2280if test x$enable_shared = xno || 2281 test "x$LD" = x || 2282 test x$glibcpp_gnu_ld_version = x; then 2283 enable_symvers=no 2284fi 2285 2286# Check to see if libgcc_s exists, indicating that shared libgcc is possible. 2287if test $enable_symvers != no; then 2288 AC_MSG_CHECKING([for shared libgcc]) 2289 ac_save_CFLAGS="$CFLAGS" 2290 CFLAGS=' -lgcc_s' 2291 AC_TRY_LINK(, [return 0], glibcpp_shared_libgcc=yes, glibcpp_shared_libgcc=no) 2292 CFLAGS="$ac_save_CFLAGS" 2293 AC_MSG_RESULT($glibcpp_shared_libgcc) 2294fi 2295 2296# For GNU ld, we need at least this version. It's 2.12 in the same format 2297# as the tested-for version. See GLIBCPP_CHECK_LINKER_FEATURES for more. 2298glibcpp_min_gnu_ld_version=21200 2299 2300# Check to see if unspecified "yes" value can win, given results 2301# above. 2302if test $enable_symvers = yes ; then 2303 if test $with_gnu_ld = yes && 2304 test $glibcpp_shared_libgcc = yes ; 2305 then 2306 if test $glibcpp_gnu_ld_version -ge $glibcpp_min_gnu_ld_version ; then 2307 enable_symvers=gnu 2308 else 2309 ac_test_CFLAGS="${CFLAGS+set}" 2310 ac_save_CFLAGS="$CFLAGS" 2311 CFLAGS='-shared -Wl,--version-script,conftest.map' 2312 enable_symvers=no 2313 changequote(,) 2314 echo 'FOO { global: f[a-z]o; local: *; };' > conftest.map 2315 changequote([,]) 2316 AC_TRY_LINK([int foo;],, enable_symvers=gnu) 2317 if test "$ac_test_CFLAGS" = set; then 2318 CFLAGS="$ac_save_CFLAGS" 2319 else 2320 # this is the suspicious part 2321 CFLAGS='' 2322 fi 2323 rm -f conftest.map 2324 fi 2325 else 2326 # just fail for now 2327 enable_symvers=no 2328 fi 2329fi 2330 2331dnl Everything parsed; figure out what file to use. 2332case $enable_symvers in 2333 no) 2334 SYMVER_MAP=config/linker-map.dummy 2335 ;; 2336 gnu) 2337 SYMVER_MAP=config/linker-map.gnu 2338 AC_DEFINE(_GLIBCPP_SYMVER) 2339 ;; 2340esac 2341 2342AC_SUBST(SYMVER_MAP) 2343AM_CONDITIONAL(GLIBCPP_BUILD_VERSIONED_SHLIB, test $enable_symvers != no) 2344AC_MSG_CHECKING([versioning on shared library symbols]) 2345AC_MSG_RESULT($enable_symvers) 2346]) 2347 2348