acinclude.m4 revision 146897
1 2dnl 3dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST) 4dnl 5dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the 6dnl end of configure. This lets tested variables be reassigned, and the 7dnl conditional will depend on the final state of the variable. For a simple 8dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED. 9dnl 10m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl 11AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl 12 m4_divert_text([glibcxx_diversion],dnl 13 AM_CONDITIONAL([$1],[$2]) 14 )dnl 15])dnl 16AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl 17 18 19dnl 20dnl Check to see what architecture and operating system we are compiling 21dnl for. Also, if architecture- or OS-specific flags are required for 22dnl compilation, pick them up here. 23dnl 24AC_DEFUN([GLIBCXX_CHECK_HOST], [ 25 . $glibcxx_srcdir/configure.host 26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir]) 27 AC_MSG_NOTICE([OS config directory is $os_include_dir]) 28]) 29 30 31dnl 32dnl Initialize basic configure bits. 33dnl 34dnl Substs: 35dnl multi_basedir 36dnl 37AC_DEFUN([GLIBCXX_TOPREL_CONFIGURE], [ 38 # Sets up multi_basedir, which is srcdir/.. plus the usual 39 # "multi_source_toprel_bottom_adjust" lunacy as needed. 40 AM_ENABLE_MULTILIB(, ..) 41 42 # The generated code is exactly the same, except that automake's looks in 43 # ".. $srcdir/.." and autoconf's looks in multi_basedir. Apparently other 44 # things are triggered on the presence of the two ...AUX_DIR[S], but I don't 45 # know what they are or what the other differences might be (and they keep 46 # changing anyhow). 47 # 48 # Looking in multi_basedir seems smarter, so actually execute that branch. 49 if false; then 50 # this is for automake 51 AC_CONFIG_AUX_DIR(..) 52 else 53 # this is for autoconf 54 AC_CONFIG_AUX_DIRS(${multi_basedir}) 55 fi 56 57 dnl XXX Turn this on. 58 dnl AC_LANG_CPLUSPLUS 59]) 60 61 62dnl 63dnl Initialize the rest of the library configury. At this point we have 64dnl variables like $host. 65dnl 66dnl Sets: 67dnl gcc_version (x.y.z format) 68dnl SUBDIRS 69dnl Substs: 70dnl glibcxx_builddir (absolute path) 71dnl glibcxx_srcdir (absolute path) 72dnl toplevel_srcdir (absolute path) 73dnl with_cross_host 74dnl with_newlib 75dnl with_target_subdir 76dnl plus 77dnl - the variables in GLIBCXX_CHECK_HOST / configure.host 78dnl - default settings for all AM_CONFITIONAL test variables 79dnl - lots of tools, like CC and CXX 80dnl 81AC_DEFUN([GLIBCXX_CONFIGURE], [ 82 # Keep these sync'd with the list in Makefile.am. The first provides an 83 # expandable list at autoconf time; the second provides an expandable list 84 # (i.e., shell variable) at configure time. 85 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite]) 86 SUBDIRS='glibcxx_SUBDIRS' 87 88 # These need to be absolute paths, yet at the same time need to 89 # canonicalize only relative paths, because then amd will not unmount 90 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. 91 glibcxx_builddir=`${PWDCMD-pwd}` 92 case $srcdir in 93 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;; 94 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;; 95 esac 96 toplevel_srcdir=${glibcxx_srcdir}/.. 97 AC_SUBST(glibcxx_builddir) 98 AC_SUBST(glibcxx_srcdir) 99 AC_SUBST(toplevel_srcdir) 100 101 # We use these options to decide which functions to include. They are 102 # set from the top level. 103 AC_ARG_WITH([target-subdir], 104 AC_HELP_STRING([--with-target-subdir=SUBDIR], 105 [configuring in a subdirectory])) 106 107 AC_ARG_WITH([cross-host], 108 AC_HELP_STRING([--with-cross-host=HOST], 109 [configuring with a cross compiler])) 110 111 AC_ARG_WITH([newlib], 112 AC_HELP_STRING([--with-newlib], 113 [assume newlib as a system C library])) 114 115 # We're almost certainly being configured before anything else which uses 116 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that 117 # we not cache the value of CXX that we "discover" here, because it's set 118 # to something unique for us and libjava. Other target libraries need to 119 # find CXX for themselves. We yank the rug out from under the normal AC_* 120 # process by sneakily renaming the cache variable. This also lets us debug 121 # the value of "our" CXX in postmortems. 122 # 123 # We must also force CXX to /not/ be a precious variable, otherwise the 124 # wrong (non-multilib-adjusted) value will be used in multilibs. This 125 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side 126 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do 127 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS. 128 # 129 # -fno-builtin must be present here so that a non-conflicting form of 130 # std::exit can be guessed by AC_PROG_CXX, and used in later tests. 131 132 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX]) 133 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS]) 134 m4_define([_AC_ARG_VAR_PRECIOUS],[]) 135 save_CXXFLAGS="$CXXFLAGS" 136 CXXFLAGS="$CXXFLAGS -fno-builtin" 137 AC_PROG_CC 138 AC_PROG_CXX 139 CXXFLAGS="$save_CXXFLAGS" 140 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 141 AC_SUBST(CFLAGS) 142 AC_SUBST(CXXFLAGS) 143 144 # For directory versioning (e.g., headers) and other variables. 145 AC_MSG_CHECKING([for GCC version number]) 146 gcc_version=`$CXX -dumpversion` 147 AC_MSG_RESULT($gcc_version) 148 149 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't 150 # available). Uncomment the next line to force a particular method. 151 AC_PROG_LN_S 152 #LN_S='cp -p' 153 154 AC_CHECK_TOOL(AS, as) 155 AC_CHECK_TOOL(AR, ar) 156 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 157 158 AM_MAINTAINER_MODE 159 160 # Set up safe default values for all subsequent AM_CONDITIONAL tests 161 # which are themselves conditionally expanded. 162 ## (Right now, this only matters for enable_wchar_t, but nothing prevents 163 ## other macros from doing the same. This should be automated.) -pme 164 need_libmath=no 165 enable_wchar_t=no 166 #enable_libstdcxx_debug=no 167 #enable_libstdcxx_pch=no 168 #enable_cheaders=c 169 #c_compatibility=no 170 #enable_abi_check=no 171 #enable_symvers=no 172 #enable_hosted_libstdcxx=yes 173 174 # Find platform-specific directories containing configuration info. 175 # Also possibly modify flags used elsewhere, as needed by the platform. 176 GLIBCXX_CHECK_HOST 177]) 178 179 180m4_include([linkage.m4]) 181m4_include([../config/no-executables.m4]) 182 183 184dnl 185dnl Tests for newer compiler features, or features that are present in newer 186dnl compiler versions but not older compiler versions still in use, should 187dnl be placed here. 188dnl 189dnl Defines: 190dnl WERROR='-Werror' if requested and possible; g++'s that lack the 191dnl new inlining code or the new system_header pragma will die on -Werror. 192dnl Leave it out by default and use maint-mode to use it. 193dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if 194dnl compiler supports it and the user has not requested debug mode. 195dnl 196AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [ 197 # All these tests are for C++; save the language and the compiler flags. 198 # The CXXFLAGS thing is suspicious, but based on similar bits previously 199 # found in GLIBCXX_CONFIGURE. 200 AC_LANG_SAVE 201 AC_LANG_CPLUSPLUS 202 ac_test_CXXFLAGS="${CXXFLAGS+set}" 203 ac_save_CXXFLAGS="$CXXFLAGS" 204 205 # Check for maintainer-mode bits. 206 if test x"$USE_MAINTAINER_MODE" = xno; then 207 WERROR='' 208 else 209 WERROR='-Werror' 210 fi 211 212 # Check for -ffunction-sections -fdata-sections 213 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections]) 214 CXXFLAGS='-Werror -ffunction-sections -fdata-sections' 215 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no]) 216 if test "$ac_test_CXXFLAGS" = set; then 217 CXXFLAGS="$ac_save_CXXFLAGS" 218 else 219 # this is the suspicious part 220 CXXFLAGS='' 221 fi 222 if test x"$ac_fdsections" = x"yes"; then 223 SECTION_FLAGS='-ffunction-sections -fdata-sections' 224 fi 225 AC_MSG_RESULT($ac_fdsections) 226 227 AC_LANG_RESTORE 228 AC_SUBST(WERROR) 229 AC_SUBST(SECTION_FLAGS) 230]) 231 232 233dnl 234dnl If GNU ld is in use, check to see if tricky linker opts can be used. If 235dnl the native linker is in use, all variables will be defined to something 236dnl safe (like an empty string). 237dnl 238dnl Defines: 239dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible 240dnl OPT_LDFLAGS='-Wl,-O1' if possible 241dnl LD (as a side effect of testing) 242dnl Sets: 243dnl with_gnu_ld 244dnl glibcxx_gnu_ld_version (possibly) 245dnl 246dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will 247dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems. 248dnl 249AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [ 250 # If we're not using GNU ld, then there's no point in even trying these 251 # tests. Check for that first. We should have already tested for gld 252 # by now (in libtool), but require it now just to be safe... 253 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' 254 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' 255 AC_REQUIRE([AC_PROG_LD]) 256 AC_REQUIRE([AC_PROG_AWK]) 257 258 # The name set by libtool depends on the version of libtool. Shame on us 259 # for depending on an impl detail, but c'est la vie. Older versions used 260 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on 261 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually 262 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't 263 # set (hence we're using an older libtool), then set it. 264 if test x${with_gnu_ld+set} != xset; then 265 if test x${ac_cv_prog_gnu_ld+set} != xset; then 266 # We got through "ac_require(ac_prog_ld)" and still not set? Huh? 267 with_gnu_ld=no 268 else 269 with_gnu_ld=$ac_cv_prog_gnu_ld 270 fi 271 fi 272 273 # Start by getting the version number. I think the libtool test already 274 # does some of this, but throws away the result. 275 changequote(,) 276 ldver=`$LD --version 2>/dev/null | head -1 | \ 277 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'` 278 changequote([,]) 279 glibcxx_gnu_ld_version=`echo $ldver | \ 280 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` 281 282 # Set --gc-sections. 283 if test "$with_gnu_ld" = "notbroken"; then 284 # GNU ld it is! Joy and bunny rabbits! 285 286 # All these tests are for C++; save the language and the compiler flags. 287 # Need to do this so that g++ won't try to link in libstdc++ 288 ac_test_CFLAGS="${CFLAGS+set}" 289 ac_save_CFLAGS="$CFLAGS" 290 CFLAGS='-x c++ -Wl,--gc-sections' 291 292 # Check for -Wl,--gc-sections 293 # XXX This test is broken at the moment, as symbols required for linking 294 # are now in libsupc++ (not built yet). In addition, this test has 295 # cored on solaris in the past. In addition, --gc-sections doesn't 296 # really work at the moment (keeps on discarding used sections, first 297 # .eh_frame and now some of the glibc sections for iconv). 298 # Bzzzzt. Thanks for playing, maybe next time. 299 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) 300 AC_TRY_RUN([ 301 int main(void) 302 { 303 try { throw 1; } 304 catch (...) { }; 305 return 0; 306 } 307 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes]) 308 if test "$ac_test_CFLAGS" = set; then 309 CFLAGS="$ac_save_CFLAGS" 310 else 311 # this is the suspicious part 312 CFLAGS='' 313 fi 314 if test "$ac_sectionLDflags" = "yes"; then 315 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" 316 fi 317 AC_MSG_RESULT($ac_sectionLDflags) 318 fi 319 320 # Set linker optimization flags. 321 if test x"$with_gnu_ld" = x"yes"; then 322 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" 323 fi 324 325 AC_SUBST(SECTION_LDFLAGS) 326 AC_SUBST(OPT_LDFLAGS) 327]) 328 329 330dnl 331dnl Check to see if this target can enable the wchar_t parts. 332dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This 333dnl must have been previously checked.) By default, wide characters are 334dnl disabled. 335dnl 336dnl Defines: 337dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h 338dnl _GLIBCXX_USE_WCHAR_T if all the bits are found. 339dnl 340AC_DEFUN([GLIBCXX_CHECK_WCHAR_T_SUPPORT], [ 341 # Test wchar.h for mbstate_t, which is needed for char_traits and 342 # others even if wchar_t support is not on. 343 AC_MSG_CHECKING([for mbstate_t]) 344 AC_TRY_COMPILE([#include <wchar.h>], 345 [mbstate_t teststate;], 346 have_mbstate_t=yes, have_mbstate_t=no) 347 AC_MSG_RESULT($have_mbstate_t) 348 if test x"$have_mbstate_t" = xyes; then 349 AC_DEFINE(HAVE_MBSTATE_T) 350 fi 351 352 # Sanity check for existence of ISO C99 headers for extended encoding. 353 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no) 354 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no) 355 356 # Only continue checking if the ISO C99 headers exist and support is on. 357 if test x"$ac_has_wchar_h" = xyes && 358 test x"$ac_has_wctype_h" = xyes && 359 test x"$enable_c_mbchar" != xno; then 360 361 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before 362 # numeric_limits can instantiate type_traits<wchar_t> 363 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX]) 364 AC_TRY_COMPILE([#include <wchar.h>], 365 [int i = WCHAR_MIN; int j = WCHAR_MAX;], 366 has_wchar_minmax=yes, has_wchar_minmax=no) 367 AC_MSG_RESULT($has_wchar_minmax) 368 369 # Test wchar.h for WEOF, which is what we use to determine whether 370 # to specialize for char_traits<wchar_t> or not. 371 AC_MSG_CHECKING([for WEOF]) 372 AC_TRY_COMPILE([ 373 #include <wchar.h> 374 #include <stddef.h>], 375 [wint_t i = WEOF;], 376 has_weof=yes, has_weof=no) 377 AC_MSG_RESULT($has_weof) 378 379 # Tests for wide character functions used in char_traits<wchar_t>. 380 ac_wfuncs=yes 381 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset], 382 [],[ac_wfuncs=no]) 383 384 # Checks for names injected into std:: by the c_std headers. 385 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \ 386 fwprintf fwscanf swprintf swscanf vfwprintf vswprintf \ 387 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \ 388 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \ 389 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \ 390 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr], 391 [],[ac_wfuncs=no]) 392 393 # Checks for wide character functions that are not required 394 # for basic wchar_t support. Don't disable support if they are missing. 395 # Injection of these is wrapped with guard macros. 396 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[]) 397 398 AC_MSG_CHECKING([for ISO C99 wchar_t support]) 399 if test x"$has_weof" = xyes && 400 test x"$has_wchar_minmax" = xyes && 401 test x"$ac_wfuncs" = xyes; 402 then 403 ac_isoC99_wchar_t=yes 404 else 405 ac_isoC99_wchar_t=no 406 fi 407 AC_MSG_RESULT($ac_isoC99_wchar_t) 408 409 # Use iconv for wchar_t to char conversions. As such, check for 410 # X/Open Portability Guide, version 2 features (XPG2). 411 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no) 412 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no) 413 414 # Check for existence of libiconv.a providing XPG2 wchar_t support. 415 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv") 416 ac_save_LIBS="$LIBS" 417 LIBS="$LIBS $libiconv" 418 419 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo], 420 [ac_XPG2funcs=yes], [ac_XPG2funcs=no]) 421 422 LIBS="$ac_save_LIBS" 423 424 AC_MSG_CHECKING([for XPG2 wchar_t support]) 425 if test x"$ac_has_iconv_h" = xyes && 426 test x"$ac_has_langinfo_h" = xyes && 427 test x"$ac_XPG2funcs" = xyes; 428 then 429 ac_XPG2_wchar_t=yes 430 else 431 ac_XPG2_wchar_t=no 432 fi 433 AC_MSG_RESULT($ac_XPG2_wchar_t) 434 435 # At the moment, only enable wchar_t specializations if all the 436 # above support is present. 437 if test x"$ac_isoC99_wchar_t" = xyes && 438 test x"$ac_XPG2_wchar_t" = xyes; 439 then 440 AC_DEFINE(_GLIBCXX_USE_WCHAR_T) 441 enable_wchar_t=yes 442 fi 443 fi 444 AC_MSG_CHECKING([for enabled wchar_t specializations]) 445 AC_MSG_RESULT($enable_wchar_t) 446]) 447 448 449dnl 450dnl Check for headers for, and arguments to, the setrlimit() function. 451dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE. 452dnl 453dnl Defines: 454dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits 455dnl various HAVE_LIMIT_* for individual limit names 456dnl 457AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [ 458 AC_TRY_COMPILE( 459 [#include <unistd.h> 460 #include <sys/time.h> 461 #include <sys/resource.h> 462 ], 463 [ int f = RLIMIT_$1 ; ], 464 [glibcxx_mresult=1], [glibcxx_mresult=0]) 465 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult, 466 [Only used in build directory testsuite_hooks.h.]) 467]) 468 469AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [ 470 setrlimit_have_headers=yes 471 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h, 472 [], 473 [setrlimit_have_headers=no]) 474 # If don't have the headers, then we can't run the tests now, and we 475 # won't be seeing any of these during testsuite compilation. 476 if test $setrlimit_have_headers = yes; then 477 # Can't do these in a loop, else the resulting syntax is wrong. 478 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA) 479 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS) 480 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM) 481 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS) 482 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE) 483 484 # Check for rlimit, setrlimit. 485 AC_CACHE_VAL(ac_setrlimit, [ 486 AC_TRY_COMPILE( 487 [#include <unistd.h> 488 #include <sys/time.h> 489 #include <sys/resource.h> 490 ], 491 [struct rlimit r; 492 setrlimit(0, &r);], 493 [ac_setrlimit=yes], [ac_setrlimit=no]) 494 ]) 495 fi 496 497 AC_MSG_CHECKING([for testsuite resource limits support]) 498 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then 499 ac_res_limits=yes 500 AC_DEFINE(_GLIBCXX_RES_LIMITS) 501 else 502 ac_res_limits=no 503 fi 504 AC_MSG_RESULT($ac_res_limits) 505]) 506 507 508dnl 509dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>. 510dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately. 511dnl 512AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [ 513 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [ 514 AC_TRY_LINK( 515 [#include <sys/stat.h>], 516 [struct stat buffer; 517 fstat(0, &buffer); 518 S_ISREG(buffer.st_mode);], 519 [glibcxx_cv_S_ISREG=yes], 520 [glibcxx_cv_S_ISREG=no]) 521 ]) 522 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [ 523 AC_TRY_LINK( 524 [#include <sys/stat.h>], 525 [struct stat buffer; 526 fstat(0, &buffer); 527 S_IFREG & buffer.st_mode;], 528 [glibcxx_cv_S_IFREG=yes], 529 [glibcxx_cv_S_IFREG=no]) 530 ]) 531 if test $glibcxx_cv_S_ISREG = yes; then 532 AC_DEFINE(HAVE_S_ISREG) 533 elif test $glibcxx_cv_S_IFREG = yes; then 534 AC_DEFINE(HAVE_S_IFREG) 535 fi 536]) 537 538 539dnl 540dnl Check whether poll is available in <poll.h>, and define HAVE_POLL. 541dnl 542AC_DEFUN([GLIBCXX_CHECK_POLL], [ 543 AC_CACHE_VAL(glibcxx_cv_POLL, [ 544 AC_TRY_LINK( 545 [#include <poll.h>], 546 [struct pollfd pfd[1]; 547 pfd[0].events = POLLIN; 548 poll(pfd, 1, 0);], 549 [glibcxx_cv_POLL=yes], 550 [glibcxx_cv_POLL=no]) 551 ]) 552 if test $glibcxx_cv_POLL = yes; then 553 AC_DEFINE(HAVE_POLL) 554 fi 555]) 556 557 558dnl 559dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV. 560dnl 561AC_DEFUN([GLIBCXX_CHECK_WRITEV], [ 562 AC_CACHE_VAL(glibcxx_cv_WRITEV, [ 563 AC_TRY_LINK( 564 [#include <sys/uio.h>], 565 [struct iovec iov[2]; 566 writev(0, iov, 0);], 567 [glibcxx_cv_WRITEV=yes], 568 [glibcxx_cv_WRITEV=no]) 569 ]) 570 if test $glibcxx_cv_WRITEV = yes; then 571 AC_DEFINE(HAVE_WRITEV) 572 fi 573]) 574 575 576dnl 577dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T. 578dnl 579AC_DEFUN([GLIBCXX_CHECK_INT64_T], [ 580 AC_CACHE_VAL(glibcxx_cv_INT64_T, [ 581 AC_TRY_COMPILE( 582 [#include <stdint.h>], 583 [int64_t var;], 584 [glibcxx_cv_INT64_T=yes], 585 [glibcxx_cv_INT64_T=no]) 586 ]) 587 if test $glibcxx_cv_INT64_T = yes; then 588 AC_DEFINE(HAVE_INT64_T) 589 fi 590]) 591 592 593dnl 594dnl Check whether LFS support is available. 595dnl 596AC_DEFUN([GLIBCXX_CHECK_LFS], [ 597 AC_LANG_SAVE 598 AC_LANG_CPLUSPLUS 599 ac_save_CXXFLAGS="$CXXFLAGS" 600 CXXFLAGS="$CXXFLAGS -fno-exceptions" 601 AC_CACHE_VAL(glibcxx_cv_LFS, [ 602 AC_TRY_LINK( 603 [#include <unistd.h> 604 #include <stdio.h> 605 ], 606 [FILE* fp; 607 fopen64("t", "w"); 608 fseeko64(fp, 0, SEEK_CUR); 609 ftello64(fp); 610 lseek64(1, 0, SEEK_CUR);], 611 [glibcxx_cv_LFS=yes], 612 [glibcxx_cv_LFS=no]) 613 ]) 614 if test $glibcxx_cv_LFS = yes; then 615 AC_DEFINE(_GLIBCXX_USE_LFS) 616 fi 617 CXXFLAGS="$ac_save_CXXFLAGS" 618 AC_LANG_RESTORE 619]) 620 621 622dnl 623dnl Check for whether a fully dynamic basic_string implementation should 624dnl be turned on, that does not put empty objects in per-process static 625dnl memory (mostly useful together with shared memory allocators, see PR 626dnl libstdc++/16612 for details). 627dnl 628dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING 629dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined 630dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)] 631dnl Where DEFAULT is either `yes' or `no'. 632dnl 633AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [ 634 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory]) 635 if test $enable_fully_dynamic_string = yes; then 636 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING) 637 fi 638]) 639 640 641dnl 642dnl Does any necessary configuration of the testsuite directory. Generates 643dnl the testsuite_hooks.h header. 644dnl 645dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this. 646dnl 647dnl Sets: 648dnl enable_abi_check / GLIBCXX_TEST_ABI 649dnl Substs: 650dnl baseline_dir 651dnl 652AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [ 653 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then 654 # Do checks for resource limit functions. 655 GLIBCXX_CHECK_SETRLIMIT 656 657 # Look for setenv, so that extended locale tests can be performed. 658 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) 659 660 if test $enable_symvers = no; then 661 enable_abi_check=no 662 else 663 case "$host" in 664 *-*-cygwin*) 665 enable_abi_check=no ;; 666 *) 667 enable_abi_check=yes ;; 668 esac 669 fi 670 else 671 # Only build this as native, since automake does not understand 672 # CXX_FOR_BUILD. 673 enable_abi_check=no 674 fi 675 676 # Export file names for ABI checking. 677 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)" 678 AC_SUBST(baseline_dir) 679 680 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes) 681 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes) 682]) 683 684 685dnl 686dnl Set up *_INCLUDES variables for all sundry Makefile.am's. 687dnl 688dnl Substs: 689dnl GLIBCXX_INCLUDES 690dnl TOPLEVEL_INCLUDES 691dnl 692AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [ 693 # Used for every C++ compile we perform. 694 GLIBCXX_INCLUDES="\ 695-I$glibcxx_builddir/include/$host_alias \ 696-I$glibcxx_builddir/include \ 697-I$glibcxx_srcdir/libsupc++" 698 699 # For Canadian crosses, pick this up too. 700 if test $CANADIAN = yes; then 701 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}" 702 fi 703 704 # Stuff in the actual top level. Currently only used by libsupc++ to 705 # get unwind* headers from the gcc dir. 706 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include' 707 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc' 708 709 # Now, export this to all the little Makefiles.... 710 AC_SUBST(GLIBCXX_INCLUDES) 711 AC_SUBST(TOPLEVEL_INCLUDES) 712]) 713 714 715dnl 716dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's. 717dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.) 718dnl 719dnl Substs: 720dnl OPTIMIZE_CXXFLAGS 721dnl WARN_FLAGS 722dnl 723AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [ 724 # Optimization flags that are probably a good idea for thrill-seekers. Just 725 # uncomment the lines below and make, everything else is ready to go... 726 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc 727 OPTIMIZE_CXXFLAGS= 728 AC_SUBST(OPTIMIZE_CXXFLAGS) 729 730 WARN_FLAGS='-Wall -W -Wwrite-strings -Wcast-qual' 731 AC_SUBST(WARN_FLAGS) 732]) 733 734 735dnl 736dnl All installation directory information is determined here. 737dnl 738dnl Substs: 739dnl gxx_install_dir 740dnl glibcxx_prefixdir 741dnl glibcxx_toolexecdir 742dnl glibcxx_toolexeclibdir 743dnl 744dnl Assumes cross_compiling bits already done, and with_cross_host in 745dnl particular. 746dnl 747AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [ 748 glibcxx_toolexecdir=no 749 glibcxx_toolexeclibdir=no 750 glibcxx_prefixdir=$prefix 751 752 AC_MSG_CHECKING([for gxx-include-dir]) 753 AC_ARG_WITH([gxx-include-dir], 754 AC_HELP_STRING([--with-gxx-include-dir=DIR], 755 [installation directory for include files]), 756 [case "$withval" in 757 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;; 758 no) gxx_include_dir=no ;; 759 *) gxx_include_dir=$withval ;; 760 esac], 761 [gxx_include_dir=no]) 762 AC_MSG_RESULT($gxx_include_dir) 763 764 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 765 AC_ARG_ENABLE([version-specific-runtime-libs], 766 AC_HELP_STRING([--enable-version-specific-runtime-libs], 767 [Specify that runtime libraries should be installed in a compiler-specific directory]), 768 [case "$enableval" in 769 yes) version_specific_libs=yes ;; 770 no) version_specific_libs=no ;; 771 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 772 esac], 773 [version_specific_libs=no]) 774 AC_MSG_RESULT($version_specific_libs) 775 776 # Default case for install directory for include files. 777 if test $version_specific_libs = no && test $gxx_include_dir = no; then 778 gxx_include_dir='${prefix}'/include/c++/${gcc_version} 779 fi 780 781 # Version-specific runtime libs processing. 782 if test $version_specific_libs = yes; then 783 # Need the gcc compiler version to know where to install libraries 784 # and header files if --enable-version-specific-runtime-libs option 785 # is selected. FIXME: these variables are misnamed, there are 786 # no executables installed in _toolexecdir or _toolexeclibdir. 787 if test x"$gxx_include_dir" = x"no"; then 788 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++ 789 fi 790 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 791 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)' 792 fi 793 794 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir 795 # Install a library built with a cross compiler in tooldir, not libdir. 796 if test x"$glibcxx_toolexecdir" = x"no"; then 797 if test -n "$with_cross_host" && 798 test x"$with_cross_host" != x"no"; then 799 glibcxx_toolexecdir='${exec_prefix}/${host_alias}' 800 glibcxx_toolexeclibdir='${toolexecdir}/lib' 801 else 802 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 803 glibcxx_toolexeclibdir='${libdir}' 804 fi 805 multi_os_directory=`$CXX -print-multi-os-directory` 806 case $multi_os_directory in 807 .) ;; # Avoid trailing /. 808 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;; 809 esac 810 fi 811 812 AC_MSG_CHECKING([for install location]) 813 AC_MSG_RESULT($gxx_include_dir) 814 815 AC_SUBST(glibcxx_prefixdir) 816 AC_SUBST(gxx_include_dir) 817 AC_SUBST(glibcxx_toolexecdir) 818 AC_SUBST(glibcxx_toolexeclibdir) 819]) 820 821 822dnl 823dnl GLIBCXX_ENABLE 824dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) 825dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) 826dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) 827dnl 828dnl See docs/html/17_intro/configury.html#enable for documentation. 829dnl 830m4_define([GLIBCXX_ENABLE],[dnl 831m4_define([_g_switch],[--enable-$1])dnl 832m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl 833 AC_ARG_ENABLE($1,_g_help, 834 m4_bmatch([$5], 835 [^permit ], 836 [[ 837 case "$enableval" in 838 m4_bpatsubst([$5],[permit ])) ;; 839 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; 840 dnl Idea for future: generate a URL pointing to 841 dnl "onlinedocs/configopts.html#whatever" 842 esac 843 ]], 844 [^$], 845 [[ 846 case "$enableval" in 847 yes|no) ;; 848 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; 849 esac 850 ]], 851 [[$5]]), 852 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) 853m4_undefine([_g_switch])dnl 854m4_undefine([_g_help])dnl 855]) 856 857 858dnl 859dnl Check for ISO/IEC 9899:1999 "C99" support. 860dnl 861dnl --enable-c99 defines _GLIBCXX_USE_C99 862dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined 863dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)] 864dnl Where DEFAULT is either `yes' or `no'. 865dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. 866dnl 867AC_DEFUN([GLIBCXX_ENABLE_C99], [ 868 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support]) 869 870 AC_LANG_SAVE 871 AC_LANG_CPLUSPLUS 872 873 # Check for the existence of <math.h> functions used if C99 is enabled. 874 ac_c99_math=yes; 875 AC_MSG_CHECKING([for ISO C99 support in <math.h>]) 876 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no]) 877 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no]) 878 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no]) 879 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no]) 880 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no]) 881 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no]) 882 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no]) 883 AC_TRY_COMPILE([#include <math.h>], 884 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no]) 885 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no]) 886 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no]) 887 AC_TRY_COMPILE([#include <math.h>], 888 [islessgreater(0.0,0.0);],, [ac_c99_math=no]) 889 AC_TRY_COMPILE([#include <math.h>], 890 [isunordered(0.0,0.0);],, [ac_c99_math=no]) 891 AC_MSG_RESULT($ac_c99_math) 892 893 if test x"$ac_c99_math" = x"yes"; then 894 AC_DEFINE(_GLIBCXX_USE_C99_MATH) 895 fi 896 897 # Check for the existence in <stdio.h> of vscanf, et. al. 898 ac_c99_stdio=yes; 899 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>]) 900 AC_TRY_COMPILE([#include <stdio.h>], 901 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no]) 902 AC_TRY_COMPILE([#include <stdio.h> 903 #include <stdarg.h> 904 void foo(char* fmt, ...) 905 {va_list args; va_start(args, fmt); 906 vfscanf(stderr, "%i", args);}], 907 [],, [ac_c99_stdio=no]) 908 AC_TRY_COMPILE([#include <stdio.h> 909 #include <stdarg.h> 910 void foo(char* fmt, ...) 911 {va_list args; va_start(args, fmt); 912 vscanf("%i", args);}], 913 [],, [ac_c99_stdio=no]) 914 AC_TRY_COMPILE([#include <stdio.h> 915 #include <stdarg.h> 916 void foo(char* fmt, ...) 917 {va_list args; va_start(args, fmt); 918 vsnprintf(fmt, 0, "%i", args);}], 919 [],, [ac_c99_stdio=no]) 920 AC_TRY_COMPILE([#include <stdio.h> 921 #include <stdarg.h> 922 void foo(char* fmt, ...) 923 {va_list args; va_start(args, fmt); 924 vsscanf(fmt, "%i", args);}], 925 [],, [ac_c99_stdio=no]) 926 AC_MSG_RESULT($ac_c99_stdio) 927 928 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 929 ac_c99_stdlib=yes; 930 AC_MSG_CHECKING([for lldiv_t declaration]) 931 AC_CACHE_VAL(ac_c99_lldiv_t, [ 932 AC_TRY_COMPILE([#include <stdlib.h>], 933 [ lldiv_t mydivt;], 934 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no]) 935 ]) 936 AC_MSG_RESULT($ac_c99_lldiv_t) 937 938 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>]) 939 AC_TRY_COMPILE([#include <stdlib.h>], 940 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no]) 941 AC_TRY_COMPILE([#include <stdlib.h>], 942 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no]) 943 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no]) 944 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no]) 945 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no]) 946 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no]) 947 if test x"$ac_c99_lldiv_t" = x"no"; then 948 ac_c99_stdlib=no; 949 fi; 950 AC_MSG_RESULT($ac_c99_stdlib) 951 952 # Check for the existence of <wchar.h> functions used if C99 is enabled. 953 # XXX the wchar.h checks should be rolled into the general C99 bits. 954 ac_c99_wchar=yes; 955 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>]) 956 AC_TRY_COMPILE([#include <wchar.h>], 957 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no]) 958 AC_TRY_COMPILE([#include <wchar.h>], 959 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no]) 960 AC_TRY_COMPILE([#include <wchar.h>], 961 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no]) 962 AC_MSG_RESULT($ac_c99_wchar) 963 964 AC_MSG_CHECKING([for enabled ISO C99 support]) 965 if test x"$ac_c99_math" = x"no" || 966 test x"$ac_c99_stdio" = x"no" || 967 test x"$ac_c99_stdlib" = x"no" || 968 test x"$ac_c99_wchar" = x"no"; then 969 enable_c99=no; 970 fi; 971 AC_MSG_RESULT($enable_c99) 972 973 if test x"$ac_99_math" = x"yes"; then 974 AC_DEFINE(_GLIBCXX_USE_C99_MATH) 975 fi 976 977 # Option parsed, now set things appropriately 978 if test x"$enable_c99" = x"yes"; then 979 AC_DEFINE(_GLIBCXX_USE_C99) 980 fi 981 982 AC_LANG_RESTORE 983]) 984 985 986dnl 987dnl Check for what type of C headers to use. 988dnl 989dnl --enable-cheaders= [does stuff]. 990dnl --disable-cheaders [does not do anything, really]. 991dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)] 992dnl Where DEFAULT is either `c' or `c_std'. 993dnl 994AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [ 995 GLIBCXX_ENABLE(cheaders,$1,[=KIND], 996 [construct "C" headers for g++], [permit c|c_std]) 997 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders) 998 999 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders 1000 1001 AC_SUBST(C_INCLUDE_DIR) 1002 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c) 1003 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std) 1004 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes) 1005]) 1006 1007 1008dnl 1009dnl Check for which locale library to use. The choice is mapped to 1010dnl a subdirectory of config/locale. 1011dnl 1012dnl Default is generic. 1013dnl 1014AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [ 1015 AC_MSG_CHECKING([for C locale to use]) 1016 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@], 1017 [use MODEL for target locale package], 1018 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto]) 1019 1020 # If they didn't use this option switch, or if they specified --enable 1021 # with no specific model, we'll have to look for one. If they 1022 # specified --disable (???), do likewise. 1023 if test $enable_clocale = no || test $enable_clocale = yes; then 1024 enable_clocale=auto 1025 fi 1026 1027 # Either a known package, or "auto" 1028 enable_clocale_flag=$enable_clocale 1029 1030 # Probe for locale support if no specific model is specified. 1031 # Default to "generic". 1032 if test $enable_clocale_flag = auto; then 1033 case x${target_os} in 1034 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu) 1035 AC_EGREP_CPP([_GLIBCXX_ok], [ 1036 #include <features.h> 1037 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) 1038 _GLIBCXX_ok 1039 #endif 1040 ], enable_clocale_flag=gnu, enable_clocale_flag=generic) 1041 1042 # Test for bugs early in glibc-2.2.x series 1043 if test x$enable_clocale_flag = xgnu; then 1044 AC_TRY_RUN([ 1045 #define _GNU_SOURCE 1 1046 #include <locale.h> 1047 #include <string.h> 1048 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 1049 extern __typeof(newlocale) __newlocale; 1050 extern __typeof(duplocale) __duplocale; 1051 extern __typeof(strcoll_l) __strcoll_l; 1052 #endif 1053 int main() 1054 { 1055 const char __one[] = "�uglein Augmen"; 1056 const char __two[] = "�uglein"; 1057 int i; 1058 int j; 1059 __locale_t loc; 1060 __locale_t loc_dup; 1061 loc = __newlocale(1 << LC_ALL, "de_DE", 0); 1062 loc_dup = __duplocale(loc); 1063 i = __strcoll_l(__one, __two, loc); 1064 j = __strcoll_l(__one, __two, loc_dup); 1065 return 0; 1066 } 1067 ], 1068 [enable_clocale_flag=gnu],[enable_clocale_flag=generic], 1069 [enable_clocale_flag=generic]) 1070 fi 1071 1072 # ... at some point put __strxfrm_l tests in as well. 1073 ;; 1074 *) 1075 enable_clocale_flag=generic 1076 ;; 1077 esac 1078 fi 1079 1080 # Deal with gettext issues. Default to not using it (=no) until we detect 1081 # support for it later. Let the user turn it off via --e/d, but let that 1082 # default to on for easier handling. 1083 USE_NLS=no 1084 AC_ARG_ENABLE(nls, 1085 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]), 1086 [], 1087 [enable_nls=yes]) 1088 1089 # Set configure bits for specified locale package 1090 case ${enable_clocale_flag} in 1091 generic) 1092 AC_MSG_RESULT(generic) 1093 1094 CLOCALE_H=config/locale/generic/c_locale.h 1095 CLOCALE_CC=config/locale/generic/c_locale.cc 1096 CCODECVT_H=config/locale/generic/codecvt_specializations.h 1097 CCODECVT_CC=config/locale/generic/codecvt_members.cc 1098 CCOLLATE_CC=config/locale/generic/collate_members.cc 1099 CCTYPE_CC=config/locale/generic/ctype_members.cc 1100 CMESSAGES_H=config/locale/generic/messages_members.h 1101 CMESSAGES_CC=config/locale/generic/messages_members.cc 1102 CMONEY_CC=config/locale/generic/monetary_members.cc 1103 CNUMERIC_CC=config/locale/generic/numeric_members.cc 1104 CTIME_H=config/locale/generic/time_members.h 1105 CTIME_CC=config/locale/generic/time_members.cc 1106 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 1107 ;; 1108 gnu) 1109 AC_MSG_RESULT(gnu) 1110 1111 # Declare intention to use gettext, and add support for specific 1112 # languages. 1113 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT 1114 ALL_LINGUAS="de fr" 1115 1116 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. 1117 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) 1118 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then 1119 USE_NLS=yes 1120 fi 1121 # Export the build objects. 1122 for ling in $ALL_LINGUAS; do \ 1123 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \ 1124 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \ 1125 done 1126 AC_SUBST(glibcxx_MOFILES) 1127 AC_SUBST(glibcxx_POFILES) 1128 1129 CLOCALE_H=config/locale/gnu/c_locale.h 1130 CLOCALE_CC=config/locale/gnu/c_locale.cc 1131 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h 1132 CCODECVT_CC=config/locale/gnu/codecvt_members.cc 1133 CCOLLATE_CC=config/locale/gnu/collate_members.cc 1134 CCTYPE_CC=config/locale/gnu/ctype_members.cc 1135 CMESSAGES_H=config/locale/gnu/messages_members.h 1136 CMESSAGES_CC=config/locale/gnu/messages_members.cc 1137 CMONEY_CC=config/locale/gnu/monetary_members.cc 1138 CNUMERIC_CC=config/locale/gnu/numeric_members.cc 1139 CTIME_H=config/locale/gnu/time_members.h 1140 CTIME_CC=config/locale/gnu/time_members.cc 1141 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h 1142 ;; 1143 ieee_1003.1-2001) 1144 AC_MSG_RESULT(IEEE 1003.1) 1145 1146 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h 1147 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc 1148 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h 1149 CCODECVT_CC=config/locale/generic/codecvt_members.cc 1150 CCOLLATE_CC=config/locale/generic/collate_members.cc 1151 CCTYPE_CC=config/locale/generic/ctype_members.cc 1152 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h 1153 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc 1154 CMONEY_CC=config/locale/generic/monetary_members.cc 1155 CNUMERIC_CC=config/locale/generic/numeric_members.cc 1156 CTIME_H=config/locale/generic/time_members.h 1157 CTIME_CC=config/locale/generic/time_members.cc 1158 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 1159 ;; 1160 esac 1161 1162 # This is where the testsuite looks for locale catalogs, using the 1163 # -DLOCALEDIR define during testsuite compilation. 1164 glibcxx_localedir=${glibcxx_builddir}/po/share/locale 1165 AC_SUBST(glibcxx_localedir) 1166 1167 # A standalone libintl (e.g., GNU libintl) may be in use. 1168 if test $USE_NLS = yes; then 1169 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no) 1170 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no) 1171 fi 1172 if test $USE_NLS = yes; then 1173 AC_DEFINE(_GLIBCXX_USE_NLS) 1174 fi 1175 1176 AC_SUBST(USE_NLS) 1177 AC_SUBST(CLOCALE_H) 1178 AC_SUBST(CCODECVT_H) 1179 AC_SUBST(CMESSAGES_H) 1180 AC_SUBST(CCODECVT_CC) 1181 AC_SUBST(CCOLLATE_CC) 1182 AC_SUBST(CCTYPE_CC) 1183 AC_SUBST(CMESSAGES_CC) 1184 AC_SUBST(CMONEY_CC) 1185 AC_SUBST(CNUMERIC_CC) 1186 AC_SUBST(CTIME_H) 1187 AC_SUBST(CTIME_CC) 1188 AC_SUBST(CLOCALE_CC) 1189 AC_SUBST(CLOCALE_INTERNAL_H) 1190]) 1191 1192 1193dnl 1194dnl Check for which std::allocator base class to use. The choice is 1195dnl mapped from a subdirectory of include/ext. 1196dnl 1197dnl Default is new. 1198dnl 1199AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [ 1200 AC_MSG_CHECKING([for std::allocator base class to use]) 1201 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND], 1202 [use KIND for target std::allocator base], 1203 [permit new|malloc|mt|bitmap|pool|yes|no|auto]) 1204 # If they didn't use this option switch, or if they specified --enable 1205 # with no specific model, we'll have to look for one. If they 1206 # specified --disable (???), do likewise. 1207 if test $enable_libstdcxx_allocator = no || test $enable_libstdcxx_allocator = yes; then 1208 enable_libstdcxx_allocator=auto 1209 fi 1210 1211 # Either a known package, or "auto" 1212 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator 1213 1214 # Probe for host-specific support if no specific model is specified. 1215 # Default to "new". 1216 if test $enable_libstdcxx_allocator_flag = auto; then 1217 case ${target_os} in 1218 *) 1219 enable_libstdcxx_allocator_flag=new 1220 ;; 1221 esac 1222 fi 1223 AC_MSG_RESULT($enable_libstdcxx_allocator_flag) 1224 1225 1226 # Set configure bits for specified locale package 1227 case ${enable_libstdcxx_allocator_flag} in 1228 bitmap) 1229 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h 1230 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator 1231 ;; 1232 malloc) 1233 ALLOCATOR_H=config/allocator/malloc_allocator_base.h 1234 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator 1235 ;; 1236 mt) 1237 ALLOCATOR_H=config/allocator/mt_allocator_base.h 1238 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc 1239 ;; 1240 new) 1241 ALLOCATOR_H=config/allocator/new_allocator_base.h 1242 ALLOCATOR_NAME=__gnu_cxx::new_allocator 1243 ;; 1244 pool) 1245 ALLOCATOR_H=config/allocator/pool_allocator_base.h 1246 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc 1247 ;; 1248 esac 1249 1250 AC_SUBST(ALLOCATOR_H) 1251 AC_SUBST(ALLOCATOR_NAME) 1252]) 1253 1254 1255dnl 1256dnl Check for whether the Boost-derived checks should be turned on. 1257dnl 1258dnl --enable-concept-checks turns them on. 1259dnl --disable-concept-checks leaves them off. 1260dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)] 1261dnl Where DEFAULT is either `yes' or `no'. 1262dnl 1263AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [ 1264 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks]) 1265 if test $enable_concept_checks = yes; then 1266 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS) 1267 fi 1268]) 1269 1270 1271dnl 1272dnl Check for which I/O library to use: stdio, or something specific. 1273dnl 1274dnl Default is stdio. 1275dnl 1276AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [ 1277 AC_MSG_CHECKING([for underlying I/O to use]) 1278 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE], 1279 [use target-specific I/O package], [permit stdio]) 1280 1281 # Now that libio has been removed, you can have any color you want as long 1282 # as it's black. This is one big no-op until other packages are added, but 1283 # showing the framework never hurts. 1284 case ${enable_cstdio} in 1285 stdio) 1286 CSTDIO_H=config/io/c_io_stdio.h 1287 BASIC_FILE_H=config/io/basic_file_stdio.h 1288 BASIC_FILE_CC=config/io/basic_file_stdio.cc 1289 AC_MSG_RESULT(stdio) 1290 ;; 1291 esac 1292 1293 AC_SUBST(CSTDIO_H) 1294 AC_SUBST(BASIC_FILE_H) 1295 AC_SUBST(BASIC_FILE_CC) 1296]) 1297 1298 1299dnl 1300dnl Check for "unusual" flags to pass to the compiler while building. 1301dnl 1302dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing 1303dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc. 1304dnl --disable-cxx-flags passes nothing. 1305dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html 1306dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html 1307dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html 1308dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags) 1309dnl If "default flags" is an empty string, the effect is the same 1310dnl as --disable or --enable=no. 1311dnl 1312AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl 1313 AC_MSG_CHECKING([for extra compiler flags for building]) 1314 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS], 1315 [pass compiler FLAGS when building library], 1316 [case "x$enable_cxx_flags" in 1317 xno | x) enable_cxx_flags= ;; 1318 x-*) ;; 1319 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 1320 esac]) 1321 1322 # Run through flags (either default or command-line) and set anything 1323 # extra (e.g., #defines) that must accompany particular g++ options. 1324 if test -n "$enable_cxx_flags"; then 1325 for f in $enable_cxx_flags; do 1326 case "$f" in 1327 -fhonor-std) ;; 1328 -*) ;; 1329 *) # and we're trying to pass /what/ exactly? 1330 AC_MSG_ERROR([compiler flags start with a -]) ;; 1331 esac 1332 done 1333 fi 1334 1335 EXTRA_CXX_FLAGS="$enable_cxx_flags" 1336 AC_MSG_RESULT($EXTRA_CXX_FLAGS) 1337 AC_SUBST(EXTRA_CXX_FLAGS) 1338]) 1339 1340 1341dnl 1342dnl Check for wide character support. Has the same effect as the option 1343dnl in gcc's configure, but in a form that autoconf can mess with. 1344dnl 1345dnl --enable-c-mbchar requests all the wchar_t stuff. 1346dnl --disable-c-mbchar doesn't. 1347dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)] 1348dnl Where DEFAULT is either `yes' or `no'. 1349dnl 1350AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [ 1351 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters]) 1352 # Option parsed, now other scripts can test enable_c_mbchar for yes/no. 1353]) 1354 1355 1356dnl 1357dnl Check to see if debugging libraries are to be built. 1358dnl 1359dnl --enable-libstdcxx-debug 1360dnl builds a separate set of debugging libraries in addition to the 1361dnl normal (shared, static) libstdc++ binaries. 1362dnl 1363dnl --disable-libstdcxx-debug 1364dnl builds only one (non-debug) version of libstdc++. 1365dnl 1366dnl --enable-libstdcxx-debug-flags=FLAGS 1367dnl iff --enable-debug == yes, then use FLAGS to build the debug library. 1368dnl 1369dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)] 1370dnl Where DEFAULT is either `yes' or `no'. 1371dnl 1372AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ 1373 AC_MSG_CHECKING([for additional debug build]) 1374 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) 1375 AC_MSG_RESULT($enable_libstdcxx_debug) 1376 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) 1377]) 1378 1379 1380dnl 1381dnl Check for explicit debug flags. 1382dnl 1383dnl --enable-libstdcxx-debug-flags='-O1' 1384dnl is a general method for passing flags to be used when 1385dnl building debug libraries with --enable-debug. 1386dnl 1387dnl --disable-libstdcxx-debug-flags does nothing. 1388dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags) 1389dnl If "default flags" is an empty string, the effect is the same 1390dnl as --disable or --enable=no. 1391dnl 1392AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [ 1393 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS], 1394 [pass compiler FLAGS when building debug library], 1395 [case "x$enable_libstdcxx_debug_flags" in 1396 xno | x) enable_libstdcxx_debug_flags= ;; 1397 x-*) ;; 1398 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 1399 esac]) 1400 1401 # Option parsed, now set things appropriately 1402 DEBUG_FLAGS="$enable_libstdcxx_debug_flags" 1403 AC_SUBST(DEBUG_FLAGS) 1404 1405 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS]) 1406]) 1407 1408 1409dnl 1410dnl Check if the user only wants a freestanding library implementation. 1411dnl 1412dnl --disable-hosted-libstdcxx will turn off most of the library build, 1413dnl installing only the headers required by [17.4.1.3] and the language 1414dnl support library. More than that will be built (to keep the Makefiles 1415dnl conveniently clean), but not installed. 1416dnl 1417dnl Sets: 1418dnl is_hosted (yes/no) 1419dnl 1420dnl Defines: 1421dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0) 1422dnl 1423AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [ 1424 AC_ARG_ENABLE([hosted-libstdcxx], 1425 AC_HELP_STRING([--disable-hosted-libstdcxx], 1426 [only build freestanding C++ runtime support]),, 1427 [enable_hosted_libstdcxx=yes]) 1428 if test "$enable_hosted_libstdcxx" = no; then 1429 AC_MSG_NOTICE([Only freestanding libraries will be built]) 1430 is_hosted=no 1431 hosted_define=0 1432 enable_abi_check=no 1433 enable_libstdcxx_pch=no 1434 else 1435 is_hosted=yes 1436 hosted_define=1 1437 fi 1438 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes) 1439 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define, 1440 [Define to 1 if a full hosted library is built, or 0 if freestanding.]) 1441]) 1442 1443 1444dnl 1445dnl Check for template specializations for the 'long long' type extension. 1446dnl The result determines only whether 'long long' I/O is enabled; things 1447dnl like numeric_limits<> specializations are always available. 1448dnl 1449dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG 1450dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined 1451dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)] 1452dnl Where DEFAULT is either `yes' or `no'. 1453dnl 1454AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [ 1455 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long']) 1456 if test $enable_long_long = yes; then 1457 AC_DEFINE(_GLIBCXX_USE_LONG_LONG) 1458 fi 1459]) 1460 1461 1462dnl 1463dnl Check to see if building and using a C++ precompiled header can be done. 1464dnl 1465dnl --enable-libstdcxx-pch=yes 1466dnl default, this shows intent to use stdc++.h.gch If it looks like it 1467dnl may work, after some light-hearted attempts to puzzle out compiler 1468dnl support, flip bits on in include/Makefile.am 1469dnl 1470dnl --disable-libstdcxx-pch 1471dnl turns off attempts to use or build stdc++.h.gch. 1472dnl 1473dnl Substs: 1474dnl glibcxx_PCHFLAGS 1475dnl 1476AC_DEFUN([GLIBCXX_ENABLE_PCH], [ 1477 AC_MSG_CHECKING([for enabled PCH]) 1478 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers]) 1479 AC_MSG_RESULT([$enable_libstdcxx_pch]) 1480 1481 if test $enable_libstdcxx_pch = yes; then 1482 AC_CACHE_CHECK([for compiler with PCH support], 1483 [glibcxx_cv_prog_CXX_pch], 1484 [ac_save_CXXFLAGS="$CXXFLAGS" 1485 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated" 1486 AC_LANG_SAVE 1487 AC_LANG_CPLUSPLUS 1488 echo '#include <math.h>' > conftest.h 1489 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \ 1490 -o conftest.h.gch 1>&5 2>&1 && 1491 echo '#error "pch failed"' > conftest.h && 1492 echo '#include "conftest.h"' > conftest.cc && 1493 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ; 1494 then 1495 glibcxx_cv_prog_CXX_pch=yes 1496 else 1497 glibcxx_cv_prog_CXX_pch=no 1498 fi 1499 rm -f conftest* 1500 CXXFLAGS=$ac_save_CXXFLAGS 1501 AC_LANG_RESTORE 1502 ]) 1503 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch 1504 fi 1505 1506 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes) 1507 if test $enable_libstdcxx_pch = yes; then 1508 glibcxx_PCHFLAGS="-include bits/stdc++.h" 1509 else 1510 glibcxx_PCHFLAGS="" 1511 fi 1512 AC_SUBST(glibcxx_PCHFLAGS) 1513]) 1514 1515 1516dnl 1517dnl Check for exception handling support. If an explicit enable/disable 1518dnl sjlj exceptions is given, we don't have to detect. Otherwise the 1519dnl target may or may not support call frame exceptions. 1520dnl 1521dnl --enable-sjlj-exceptions forces the use of builtin setjmp. 1522dnl --disable-sjlj-exceptions forces the use of call frame unwinding. 1523dnl Neither one forces an attempt at detection. 1524dnl 1525dnl Defines: 1526dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it 1527dnl 1528AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [ 1529 AC_MSG_CHECKING([for exception model to use]) 1530 AC_LANG_SAVE 1531 AC_LANG_CPLUSPLUS 1532 GLIBCXX_ENABLE(sjlj-exceptions,auto,, 1533 [force use of builtin_setjmp for exceptions], 1534 [permit yes|no|auto]) 1535 1536 if test $enable_sjlj_exceptions = auto; then 1537 # Botheration. Now we've got to detect the exception model. Link tests 1538 # against libgcc.a are problematic since we've not been given proper -L 1539 # bits for single-tree newlib and libgloss. 1540 # 1541 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style. 1542 cat > conftest.$ac_ext << EOF 1543[#]line __oline__ "configure" 1544struct S { ~S(); }; 1545void bar(); 1546void foo() 1547{ 1548 S s; 1549 bar(); 1550} 1551EOF 1552 old_CXXFLAGS="$CXXFLAGS" 1553 CXXFLAGS=-S 1554 if AC_TRY_EVAL(ac_compile); then 1555 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then 1556 enable_sjlj_exceptions=yes 1557 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then 1558 enable_sjlj_exceptions=no 1559 fi 1560 fi 1561 CXXFLAGS="$old_CXXFLAGS" 1562 rm -f conftest* 1563 fi 1564 1565 # This is a tad weird, for hysterical raisins. We have to map enable/disable 1566 # to two different models. 1567 case $enable_sjlj_exceptions in 1568 yes) 1569 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1, 1570 [Define if the compiler is configured for setjmp/longjmp exceptions.]) 1571 ac_exception_model_name=sjlj 1572 ;; 1573 no) 1574 ac_exception_model_name="call frame" 1575 ;; 1576 *) 1577 AC_MSG_ERROR([unable to detect exception model]) 1578 ;; 1579 esac 1580 AC_LANG_RESTORE 1581 AC_MSG_RESULT($ac_exception_model_name) 1582]) 1583 1584 1585dnl 1586dnl Add version tags to symbols in shared library (or not), additionally 1587dnl marking other symbols as private/local (or not). 1588dnl 1589dnl --enable-symvers=style adds a version script to the linker call when 1590dnl creating the shared library. The choice of version script is 1591dnl controlled by 'style'. 1592dnl --disable-symvers does not. 1593dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)] 1594dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to 1595dnl choose a default style based on linker characteristics. Passing 1596dnl 'no' disables versioning. 1597dnl 1598AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [ 1599 1600GLIBCXX_ENABLE(symvers,$1,[=STYLE], 1601 [enables symbol versioning of the shared library], 1602 [permit yes|no|gnu]) 1603 1604# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we 1605# don't know enough about $LD to do tricks... 1606AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES]) 1607# FIXME The following test is too strict, in theory. 1608if test $enable_shared = no || 1609 test "x$LD" = x || 1610 test x$glibcxx_gnu_ld_version = x; then 1611 enable_symvers=no 1612fi 1613 1614# Check to see if libgcc_s exists, indicating that shared libgcc is possible. 1615if test $enable_symvers != no; then 1616 AC_MSG_CHECKING([for shared libgcc]) 1617 ac_save_CFLAGS="$CFLAGS" 1618 CFLAGS=' -lgcc_s' 1619 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) 1620 CFLAGS="$ac_save_CFLAGS" 1621 if test $glibcxx_shared_libgcc = no; then 1622 cat > conftest.c <<EOF 1623int main (void) { return 0; } 1624EOF 1625changequote(,)dnl 1626 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ 1627 -shared -shared-libgcc -o conftest.so \ 1628 conftest.c -v 2>&1 >/dev/null \ 1629 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` 1630changequote([,])dnl 1631 rm -f conftest.c conftest.so 1632 if test x${glibcxx_libgcc_s_suffix+set} = xset; then 1633 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" 1634 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) 1635 CFLAGS="$ac_save_CFLAGS" 1636 fi 1637 fi 1638 AC_MSG_RESULT($glibcxx_shared_libgcc) 1639fi 1640 1641# For GNU ld, we need at least this version. The format is described in 1642# GLIBCXX_CHECK_LINKER_FEATURES above. 1643glibcxx_min_gnu_ld_version=21400 1644# XXXXXXXXXXX glibcxx_gnu_ld_version=21390 1645 1646# Check to see if unspecified "yes" value can win, given results above. 1647# Change "yes" into either "no" or a style name. 1648if test $enable_symvers = yes; then 1649 if test $with_gnu_ld = yes && 1650 test $glibcxx_shared_libgcc = yes; 1651 then 1652 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then 1653 enable_symvers=gnu 1654 else 1655 # The right tools, the right setup, but too old. Fallbacks? 1656 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for) 1657 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) 1658 AC_MSG_WARN(=== You would need to upgrade your binutils to version) 1659 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.) 1660 if test $glibcxx_gnu_ld_version -ge 21200 ; then 1661 # Globbing fix is present, proper block support is not. 1662 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.]) 1663 dnl enable_symvers=??? 1664 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 1665 enable_symvers=no 1666 else 1667 # 2.11 or older. 1668 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 1669 enable_symvers=no 1670 fi 1671 fi 1672 else 1673 # just fail for now 1674 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but]) 1675 AC_MSG_WARN([=== either you are not using a supported linker, or you are]) 1676 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).]) 1677 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 1678 enable_symvers=no 1679 fi 1680fi 1681 1682# Everything parsed; figure out what file to use. 1683case $enable_symvers in 1684 no) 1685 SYMVER_MAP=config/linker-map.dummy 1686 ;; 1687 gnu) 1688 SYMVER_MAP=config/linker-map.gnu 1689 AC_DEFINE(_GLIBCXX_SYMVER) 1690 ;; 1691esac 1692 1693AC_SUBST(SYMVER_MAP) 1694AC_SUBST(port_specific_symbol_files) 1695GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no) 1696AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) 1697]) 1698 1699 1700dnl 1701dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. 1702dnl We must stage the required headers so that they will be installed 1703dnl with the library (unlike libgcc, the STL implementation is provided 1704dnl solely within headers). Since we must not inject random user-space 1705dnl macro names into user-provided C++ code, we first stage into <file>-in 1706dnl and process to <file> with an output command. The reason for a two- 1707dnl stage process here is to correctly handle $srcdir!=$objdir without 1708dnl having to write complex code (the sed commands to clean the macro 1709dnl namespace are complex and fragile enough as it is). We must also 1710dnl add a relative path so that -I- is supported properly. 1711dnl 1712dnl Substs: 1713dnl glibcxx_thread_h 1714dnl 1715dnl Defines: 1716dnl HAVE_GTHR_DEFAULT 1717dnl 1718AC_DEFUN([GLIBCXX_ENABLE_THREADS], [ 1719 AC_MSG_CHECKING([for thread model used by GCC]) 1720 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 1721 AC_MSG_RESULT([$target_thread_file]) 1722 1723 if test $target_thread_file != single; then 1724 AC_DEFINE(HAVE_GTHR_DEFAULT) 1725 fi 1726 1727 glibcxx_thread_h=gthr-$target_thread_file.h 1728 AC_SUBST(glibcxx_thread_h) 1729]) 1730 1731 1732# Check whether LC_MESSAGES is available in <locale.h>. 1733# Ulrich Drepper <drepper@cygnus.com>, 1995. 1734# 1735# This file file be copied and used freely without restrictions. It can 1736# be used in projects which are not available under the GNU Public License 1737# but which still want to provide support for the GNU gettext functionality. 1738# Please note that the actual code is *not* freely available. 1739 1740# serial 1 1741AC_DEFUN([AC_LC_MESSAGES], [ 1742 AC_CHECK_HEADER(locale.h, [ 1743 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, 1744 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES], 1745 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) 1746 if test $ac_cv_val_LC_MESSAGES = yes; then 1747 AC_DEFINE(HAVE_LC_MESSAGES) 1748 fi 1749 ]) 1750]) 1751 1752 1753sinclude([../libtool.m4]) 1754dnl The lines below arrange for aclocal not to bring an installed 1755dnl libtool.m4 into aclocal.m4, while still arranging for automake to 1756dnl add a definition of LIBTOOL to Makefile.in. 1757ifelse(,,,[AC_SUBST(LIBTOOL) 1758AC_DEFUN([AM_PROG_LIBTOOL]) 1759AC_DEFUN([AC_LIBTOOL_DLOPEN]) 1760AC_DEFUN([AC_PROG_LD]) 1761]) 1762 1763dnl vim:et:ts=2:sw=2 1764