acinclude.m4 revision 132720
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 Does any necessary configuration of the testsuite directory. Generates 624dnl the testsuite_hooks.h header. 625dnl 626dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this. 627dnl 628dnl Sets: 629dnl enable_abi_check / GLIBCXX_TEST_ABI 630dnl Substs: 631dnl baseline_dir 632dnl 633AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [ 634 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then 635 # Do checks for resource limit functions. 636 GLIBCXX_CHECK_SETRLIMIT 637 638 # Look for setenv, so that extended locale tests can be performed. 639 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) 640 641 if test $enable_symvers = no; then 642 enable_abi_check=no 643 else 644 case "$host" in 645 *-*-cygwin*) 646 enable_abi_check=no ;; 647 *) 648 enable_abi_check=yes ;; 649 esac 650 fi 651 else 652 # Only build this as native, since automake does not understand 653 # CXX_FOR_BUILD. 654 enable_abi_check=no 655 fi 656 657 # Export file names for ABI checking. 658 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)" 659 AC_SUBST(baseline_dir) 660 661 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes) 662 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes) 663]) 664 665 666dnl 667dnl Set up *_INCLUDES variables for all sundry Makefile.am's. 668dnl 669dnl Substs: 670dnl GLIBCXX_INCLUDES 671dnl TOPLEVEL_INCLUDES 672dnl 673AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [ 674 # Used for every C++ compile we perform. 675 GLIBCXX_INCLUDES="\ 676-I$glibcxx_builddir/include/$host_alias \ 677-I$glibcxx_builddir/include \ 678-I$glibcxx_srcdir/libsupc++" 679 680 # For Canadian crosses, pick this up too. 681 if test $CANADIAN = yes; then 682 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}" 683 fi 684 685 # Stuff in the actual top level. Currently only used by libsupc++ to 686 # get unwind* headers from the gcc dir. 687 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include' 688 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc' 689 690 # Now, export this to all the little Makefiles.... 691 AC_SUBST(GLIBCXX_INCLUDES) 692 AC_SUBST(TOPLEVEL_INCLUDES) 693]) 694 695 696dnl 697dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's. 698dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.) 699dnl 700dnl Substs: 701dnl OPTIMIZE_CXXFLAGS 702dnl WARN_FLAGS 703dnl 704AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [ 705 # Optimization flags that are probably a good idea for thrill-seekers. Just 706 # uncomment the lines below and make, everything else is ready to go... 707 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc 708 OPTIMIZE_CXXFLAGS= 709 AC_SUBST(OPTIMIZE_CXXFLAGS) 710 711 WARN_FLAGS='-Wall -W -Wwrite-strings -Wcast-qual' 712 AC_SUBST(WARN_FLAGS) 713]) 714 715 716dnl 717dnl All installation directory information is determined here. 718dnl 719dnl Substs: 720dnl gxx_install_dir 721dnl glibcxx_prefixdir 722dnl glibcxx_toolexecdir 723dnl glibcxx_toolexeclibdir 724dnl 725dnl Assumes cross_compiling bits already done, and with_cross_host in 726dnl particular. 727dnl 728AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [ 729 glibcxx_toolexecdir=no 730 glibcxx_toolexeclibdir=no 731 glibcxx_prefixdir=$prefix 732 733 AC_MSG_CHECKING([for gxx-include-dir]) 734 AC_ARG_WITH([gxx-include-dir], 735 AC_HELP_STRING([--with-gxx-include-dir=DIR], 736 [installation directory for include files]), 737 [case "$withval" in 738 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;; 739 no) gxx_include_dir=no ;; 740 *) gxx_include_dir=$withval ;; 741 esac], 742 [gxx_include_dir=no]) 743 AC_MSG_RESULT($gxx_include_dir) 744 745 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 746 AC_ARG_ENABLE([version-specific-runtime-libs], 747 AC_HELP_STRING([--enable-version-specific-runtime-libs], 748 [Specify that runtime libraries should be installed in a compiler-specific directory]), 749 [case "$enableval" in 750 yes) version_specific_libs=yes ;; 751 no) version_specific_libs=no ;; 752 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 753 esac], 754 [version_specific_libs=no]) 755 AC_MSG_RESULT($version_specific_libs) 756 757 # Default case for install directory for include files. 758 if test $version_specific_libs = no && test $gxx_include_dir = no; then 759 gxx_include_dir='${prefix}'/include/c++/${gcc_version} 760 fi 761 762 # Version-specific runtime libs processing. 763 if test $version_specific_libs = yes; then 764 # Need the gcc compiler version to know where to install libraries 765 # and header files if --enable-version-specific-runtime-libs option 766 # is selected. FIXME: these variables are misnamed, there are 767 # no executables installed in _toolexecdir or _toolexeclibdir. 768 if test x"$gxx_include_dir" = x"no"; then 769 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++ 770 fi 771 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 772 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)' 773 fi 774 775 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir 776 # Install a library built with a cross compiler in tooldir, not libdir. 777 if test x"$glibcxx_toolexecdir" = x"no"; then 778 if test -n "$with_cross_host" && 779 test x"$with_cross_host" != x"no"; then 780 glibcxx_toolexecdir='${exec_prefix}/${host_alias}' 781 glibcxx_toolexeclibdir='${toolexecdir}/lib' 782 else 783 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 784 glibcxx_toolexeclibdir='${libdir}' 785 fi 786 multi_os_directory=`$CXX -print-multi-os-directory` 787 case $multi_os_directory in 788 .) ;; # Avoid trailing /. 789 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;; 790 esac 791 fi 792 793 AC_MSG_CHECKING([for install location]) 794 AC_MSG_RESULT($gxx_include_dir) 795 796 AC_SUBST(glibcxx_prefixdir) 797 AC_SUBST(gxx_include_dir) 798 AC_SUBST(glibcxx_toolexecdir) 799 AC_SUBST(glibcxx_toolexeclibdir) 800]) 801 802 803dnl 804dnl GLIBCXX_ENABLE 805dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) 806dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) 807dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) 808dnl 809dnl See docs/html/17_intro/configury.html#enable for documentation. 810dnl 811m4_define([GLIBCXX_ENABLE],[dnl 812m4_define([_g_switch],[--enable-$1])dnl 813m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl 814 AC_ARG_ENABLE($1,_g_help, 815 m4_bmatch([$5], 816 [^permit ], 817 [[ 818 case "$enableval" in 819 m4_bpatsubst([$5],[permit ])) ;; 820 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; 821 dnl Idea for future: generate a URL pointing to 822 dnl "onlinedocs/configopts.html#whatever" 823 esac 824 ]], 825 [^$], 826 [[ 827 case "$enableval" in 828 yes|no) ;; 829 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; 830 esac 831 ]], 832 [[$5]]), 833 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) 834m4_undefine([_g_switch])dnl 835m4_undefine([_g_help])dnl 836]) 837 838 839dnl 840dnl Check for ISO/IEC 9899:1999 "C99" support. 841dnl 842dnl --enable-c99 defines _GLIBCXX_USE_C99 843dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined 844dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)] 845dnl Where DEFAULT is either `yes' or `no'. 846dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. 847dnl 848AC_DEFUN([GLIBCXX_ENABLE_C99], [ 849 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support]) 850 851 AC_LANG_SAVE 852 AC_LANG_CPLUSPLUS 853 854 # Check for the existence of <math.h> functions used if C99 is enabled. 855 ac_c99_math=yes; 856 AC_MSG_CHECKING([for ISO C99 support in <math.h>]) 857 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no]) 858 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no]) 859 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no]) 860 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no]) 861 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no]) 862 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no]) 863 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no]) 864 AC_TRY_COMPILE([#include <math.h>], 865 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no]) 866 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no]) 867 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no]) 868 AC_TRY_COMPILE([#include <math.h>], 869 [islessgreater(0.0,0.0);],, [ac_c99_math=no]) 870 AC_TRY_COMPILE([#include <math.h>], 871 [isunordered(0.0,0.0);],, [ac_c99_math=no]) 872 AC_MSG_RESULT($ac_c99_math) 873 874 if test x"$ac_c99_math" = x"yes"; then 875 AC_DEFINE(_GLIBCXX_USE_C99_MATH) 876 fi 877 878 # Check for the existence in <stdio.h> of vscanf, et. al. 879 ac_c99_stdio=yes; 880 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>]) 881 AC_TRY_COMPILE([#include <stdio.h>], 882 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no]) 883 AC_TRY_COMPILE([#include <stdio.h> 884 #include <stdarg.h> 885 void foo(char* fmt, ...) 886 {va_list args; va_start(args, fmt); 887 vfscanf(stderr, "%i", args);}], 888 [],, [ac_c99_stdio=no]) 889 AC_TRY_COMPILE([#include <stdio.h> 890 #include <stdarg.h> 891 void foo(char* fmt, ...) 892 {va_list args; va_start(args, fmt); 893 vscanf("%i", args);}], 894 [],, [ac_c99_stdio=no]) 895 AC_TRY_COMPILE([#include <stdio.h> 896 #include <stdarg.h> 897 void foo(char* fmt, ...) 898 {va_list args; va_start(args, fmt); 899 vsnprintf(fmt, 0, "%i", args);}], 900 [],, [ac_c99_stdio=no]) 901 AC_TRY_COMPILE([#include <stdio.h> 902 #include <stdarg.h> 903 void foo(char* fmt, ...) 904 {va_list args; va_start(args, fmt); 905 vsscanf(fmt, "%i", args);}], 906 [],, [ac_c99_stdio=no]) 907 AC_MSG_RESULT($ac_c99_stdio) 908 909 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 910 ac_c99_stdlib=yes; 911 AC_MSG_CHECKING([for lldiv_t declaration]) 912 AC_CACHE_VAL(ac_c99_lldiv_t, [ 913 AC_TRY_COMPILE([#include <stdlib.h>], 914 [ lldiv_t mydivt;], 915 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no]) 916 ]) 917 AC_MSG_RESULT($ac_c99_lldiv_t) 918 919 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>]) 920 AC_TRY_COMPILE([#include <stdlib.h>], 921 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no]) 922 AC_TRY_COMPILE([#include <stdlib.h>], 923 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no]) 924 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no]) 925 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no]) 926 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no]) 927 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no]) 928 if test x"$ac_c99_lldiv_t" = x"no"; then 929 ac_c99_stdlib=no; 930 fi; 931 AC_MSG_RESULT($ac_c99_stdlib) 932 933 # Check for the existence of <wchar.h> functions used if C99 is enabled. 934 # XXX the wchar.h checks should be rolled into the general C99 bits. 935 ac_c99_wchar=yes; 936 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>]) 937 AC_TRY_COMPILE([#include <wchar.h>], 938 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no]) 939 AC_TRY_COMPILE([#include <wchar.h>], 940 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no]) 941 AC_TRY_COMPILE([#include <wchar.h>], 942 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no]) 943 AC_MSG_RESULT($ac_c99_wchar) 944 945 AC_MSG_CHECKING([for enabled ISO C99 support]) 946 if test x"$ac_c99_math" = x"no" || 947 test x"$ac_c99_stdio" = x"no" || 948 test x"$ac_c99_stdlib" = x"no" || 949 test x"$ac_c99_wchar" = x"no"; then 950 enable_c99=no; 951 fi; 952 AC_MSG_RESULT($enable_c99) 953 954 if test x"$ac_99_math" = x"yes"; then 955 AC_DEFINE(_GLIBCXX_USE_C99_MATH) 956 fi 957 958 # Option parsed, now set things appropriately 959 if test x"$enable_c99" = x"yes"; then 960 AC_DEFINE(_GLIBCXX_USE_C99) 961 fi 962 963 AC_LANG_RESTORE 964]) 965 966 967dnl 968dnl Check for what type of C headers to use. 969dnl 970dnl --enable-cheaders= [does stuff]. 971dnl --disable-cheaders [does not do anything, really]. 972dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)] 973dnl Where DEFAULT is either `c' or `c_std'. 974dnl 975AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [ 976 GLIBCXX_ENABLE(cheaders,$1,[=KIND], 977 [construct "C" headers for g++], [permit c|c_std]) 978 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders) 979 980 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders 981 982 AC_SUBST(C_INCLUDE_DIR) 983 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c) 984 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std) 985 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes) 986]) 987 988 989dnl 990dnl Check for which locale library to use. The choice is mapped to 991dnl a subdirectory of config/locale. 992dnl 993dnl Default is generic. 994dnl 995AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [ 996 AC_MSG_CHECKING([for C locale to use]) 997 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@], 998 [use MODEL for target locale package], 999 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto]) 1000 1001 # If they didn't use this option switch, or if they specified --enable 1002 # with no specific model, we'll have to look for one. If they 1003 # specified --disable (???), do likewise. 1004 if test $enable_clocale = no || test $enable_clocale = yes; then 1005 enable_clocale=auto 1006 fi 1007 1008 # Either a known package, or "auto" 1009 enable_clocale_flag=$enable_clocale 1010 1011 # Probe for locale support if no specific model is specified. 1012 # Default to "generic". 1013 if test $enable_clocale_flag = auto; then 1014 case x${target_os} in 1015 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu) 1016 AC_EGREP_CPP([_GLIBCXX_ok], [ 1017 #include <features.h> 1018 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) 1019 _GLIBCXX_ok 1020 #endif 1021 ], enable_clocale_flag=gnu, enable_clocale_flag=generic) 1022 1023 # Test for bugs early in glibc-2.2.x series 1024 if test x$enable_clocale_flag = xgnu; then 1025 AC_TRY_RUN([ 1026 #define _GNU_SOURCE 1 1027 #include <locale.h> 1028 #include <string.h> 1029 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 1030 extern __typeof(newlocale) __newlocale; 1031 extern __typeof(duplocale) __duplocale; 1032 extern __typeof(strcoll_l) __strcoll_l; 1033 #endif 1034 int main() 1035 { 1036 const char __one[] = "�uglein Augmen"; 1037 const char __two[] = "�uglein"; 1038 int i; 1039 int j; 1040 __locale_t loc; 1041 __locale_t loc_dup; 1042 loc = __newlocale(1 << LC_ALL, "de_DE", 0); 1043 loc_dup = __duplocale(loc); 1044 i = __strcoll_l(__one, __two, loc); 1045 j = __strcoll_l(__one, __two, loc_dup); 1046 return 0; 1047 } 1048 ], 1049 [enable_clocale_flag=gnu],[enable_clocale_flag=generic], 1050 [enable_clocale_flag=generic]) 1051 fi 1052 1053 # ... at some point put __strxfrm_l tests in as well. 1054 ;; 1055 *) 1056 enable_clocale_flag=generic 1057 ;; 1058 esac 1059 fi 1060 1061 # Deal with gettext issues. Default to not using it (=no) until we detect 1062 # support for it later. Let the user turn it off via --e/d, but let that 1063 # default to on for easier handling. 1064 USE_NLS=no 1065 AC_ARG_ENABLE(nls, 1066 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]), 1067 [], 1068 [enable_nls=yes]) 1069 1070 # Set configure bits for specified locale package 1071 case ${enable_clocale_flag} in 1072 generic) 1073 AC_MSG_RESULT(generic) 1074 1075 CLOCALE_H=config/locale/generic/c_locale.h 1076 CLOCALE_CC=config/locale/generic/c_locale.cc 1077 CCODECVT_H=config/locale/generic/codecvt_specializations.h 1078 CCODECVT_CC=config/locale/generic/codecvt_members.cc 1079 CCOLLATE_CC=config/locale/generic/collate_members.cc 1080 CCTYPE_CC=config/locale/generic/ctype_members.cc 1081 CMESSAGES_H=config/locale/generic/messages_members.h 1082 CMESSAGES_CC=config/locale/generic/messages_members.cc 1083 CMONEY_CC=config/locale/generic/monetary_members.cc 1084 CNUMERIC_CC=config/locale/generic/numeric_members.cc 1085 CTIME_H=config/locale/generic/time_members.h 1086 CTIME_CC=config/locale/generic/time_members.cc 1087 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 1088 ;; 1089 gnu) 1090 AC_MSG_RESULT(gnu) 1091 1092 # Declare intention to use gettext, and add support for specific 1093 # languages. 1094 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT 1095 ALL_LINGUAS="de fr" 1096 1097 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. 1098 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) 1099 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then 1100 USE_NLS=yes 1101 fi 1102 # Export the build objects. 1103 for ling in $ALL_LINGUAS; do \ 1104 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \ 1105 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \ 1106 done 1107 AC_SUBST(glibcxx_MOFILES) 1108 AC_SUBST(glibcxx_POFILES) 1109 1110 CLOCALE_H=config/locale/gnu/c_locale.h 1111 CLOCALE_CC=config/locale/gnu/c_locale.cc 1112 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h 1113 CCODECVT_CC=config/locale/gnu/codecvt_members.cc 1114 CCOLLATE_CC=config/locale/gnu/collate_members.cc 1115 CCTYPE_CC=config/locale/gnu/ctype_members.cc 1116 CMESSAGES_H=config/locale/gnu/messages_members.h 1117 CMESSAGES_CC=config/locale/gnu/messages_members.cc 1118 CMONEY_CC=config/locale/gnu/monetary_members.cc 1119 CNUMERIC_CC=config/locale/gnu/numeric_members.cc 1120 CTIME_H=config/locale/gnu/time_members.h 1121 CTIME_CC=config/locale/gnu/time_members.cc 1122 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h 1123 ;; 1124 ieee_1003.1-2001) 1125 AC_MSG_RESULT(IEEE 1003.1) 1126 1127 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h 1128 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc 1129 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h 1130 CCODECVT_CC=config/locale/generic/codecvt_members.cc 1131 CCOLLATE_CC=config/locale/generic/collate_members.cc 1132 CCTYPE_CC=config/locale/generic/ctype_members.cc 1133 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h 1134 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc 1135 CMONEY_CC=config/locale/generic/monetary_members.cc 1136 CNUMERIC_CC=config/locale/generic/numeric_members.cc 1137 CTIME_H=config/locale/generic/time_members.h 1138 CTIME_CC=config/locale/generic/time_members.cc 1139 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 1140 ;; 1141 esac 1142 1143 # This is where the testsuite looks for locale catalogs, using the 1144 # -DLOCALEDIR define during testsuite compilation. 1145 glibcxx_localedir=${glibcxx_builddir}/po/share/locale 1146 AC_SUBST(glibcxx_localedir) 1147 1148 # A standalone libintl (e.g., GNU libintl) may be in use. 1149 if test $USE_NLS = yes; then 1150 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no) 1151 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no) 1152 fi 1153 if test $USE_NLS = yes; then 1154 AC_DEFINE(_GLIBCXX_USE_NLS) 1155 fi 1156 1157 AC_SUBST(USE_NLS) 1158 AC_SUBST(CLOCALE_H) 1159 AC_SUBST(CCODECVT_H) 1160 AC_SUBST(CMESSAGES_H) 1161 AC_SUBST(CCODECVT_CC) 1162 AC_SUBST(CCOLLATE_CC) 1163 AC_SUBST(CCTYPE_CC) 1164 AC_SUBST(CMESSAGES_CC) 1165 AC_SUBST(CMONEY_CC) 1166 AC_SUBST(CNUMERIC_CC) 1167 AC_SUBST(CTIME_H) 1168 AC_SUBST(CTIME_CC) 1169 AC_SUBST(CLOCALE_CC) 1170 AC_SUBST(CLOCALE_INTERNAL_H) 1171]) 1172 1173 1174dnl 1175dnl Check for which std::allocator base class to use. The choice is 1176dnl mapped from a subdirectory of include/ext. 1177dnl 1178dnl Default is new. 1179dnl 1180AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [ 1181 AC_MSG_CHECKING([for std::allocator base class to use]) 1182 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND], 1183 [use KIND for target std::allocator base], 1184 [permit new|malloc|mt|bitmap|pool|yes|no|auto]) 1185 # If they didn't use this option switch, or if they specified --enable 1186 # with no specific model, we'll have to look for one. If they 1187 # specified --disable (???), do likewise. 1188 if test $enable_libstdcxx_allocator = no || test $enable_libstdcxx_allocator = yes; then 1189 enable_libstdcxx_allocator=auto 1190 fi 1191 1192 # Either a known package, or "auto" 1193 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator 1194 1195 # Probe for host-specific support if no specific model is specified. 1196 # Default to "new". 1197 if test $enable_libstdcxx_allocator_flag = auto; then 1198 case ${target_os} in 1199 *) 1200 enable_libstdcxx_allocator_flag=new 1201 ;; 1202 esac 1203 fi 1204 AC_MSG_RESULT($enable_libstdcxx_allocator_flag) 1205 1206 1207 # Set configure bits for specified locale package 1208 case ${enable_libstdcxx_allocator_flag} in 1209 bitmap) 1210 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h 1211 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator 1212 ;; 1213 malloc) 1214 ALLOCATOR_H=config/allocator/malloc_allocator_base.h 1215 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator 1216 ;; 1217 mt) 1218 ALLOCATOR_H=config/allocator/mt_allocator_base.h 1219 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc 1220 ;; 1221 new) 1222 ALLOCATOR_H=config/allocator/new_allocator_base.h 1223 ALLOCATOR_NAME=__gnu_cxx::new_allocator 1224 ;; 1225 pool) 1226 ALLOCATOR_H=config/allocator/pool_allocator_base.h 1227 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc 1228 ;; 1229 esac 1230 1231 AC_SUBST(ALLOCATOR_H) 1232 AC_SUBST(ALLOCATOR_NAME) 1233]) 1234 1235 1236dnl 1237dnl Check for whether the Boost-derived checks should be turned on. 1238dnl 1239dnl --enable-concept-checks turns them on. 1240dnl --disable-concept-checks leaves them off. 1241dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)] 1242dnl Where DEFAULT is either `yes' or `no'. 1243dnl 1244AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [ 1245 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks]) 1246 if test $enable_concept_checks = yes; then 1247 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS) 1248 fi 1249]) 1250 1251 1252dnl 1253dnl Check for which I/O library to use: stdio, or something specific. 1254dnl 1255dnl Default is stdio. 1256dnl 1257AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [ 1258 AC_MSG_CHECKING([for underlying I/O to use]) 1259 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE], 1260 [use target-specific I/O package], [permit stdio]) 1261 1262 # Now that libio has been removed, you can have any color you want as long 1263 # as it's black. This is one big no-op until other packages are added, but 1264 # showing the framework never hurts. 1265 case ${enable_cstdio} in 1266 stdio) 1267 CSTDIO_H=config/io/c_io_stdio.h 1268 BASIC_FILE_H=config/io/basic_file_stdio.h 1269 BASIC_FILE_CC=config/io/basic_file_stdio.cc 1270 AC_MSG_RESULT(stdio) 1271 ;; 1272 esac 1273 1274 AC_SUBST(CSTDIO_H) 1275 AC_SUBST(BASIC_FILE_H) 1276 AC_SUBST(BASIC_FILE_CC) 1277]) 1278 1279 1280dnl 1281dnl Check for "unusual" flags to pass to the compiler while building. 1282dnl 1283dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing 1284dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc. 1285dnl --disable-cxx-flags passes nothing. 1286dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html 1287dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html 1288dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html 1289dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags) 1290dnl If "default flags" is an empty string, the effect is the same 1291dnl as --disable or --enable=no. 1292dnl 1293AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl 1294 AC_MSG_CHECKING([for extra compiler flags for building]) 1295 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS], 1296 [pass compiler FLAGS when building library], 1297 [case "x$enable_cxx_flags" in 1298 xno | x) enable_cxx_flags= ;; 1299 x-*) ;; 1300 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 1301 esac]) 1302 1303 # Run through flags (either default or command-line) and set anything 1304 # extra (e.g., #defines) that must accompany particular g++ options. 1305 if test -n "$enable_cxx_flags"; then 1306 for f in $enable_cxx_flags; do 1307 case "$f" in 1308 -fhonor-std) ;; 1309 -*) ;; 1310 *) # and we're trying to pass /what/ exactly? 1311 AC_MSG_ERROR([compiler flags start with a -]) ;; 1312 esac 1313 done 1314 fi 1315 1316 EXTRA_CXX_FLAGS="$enable_cxx_flags" 1317 AC_MSG_RESULT($EXTRA_CXX_FLAGS) 1318 AC_SUBST(EXTRA_CXX_FLAGS) 1319]) 1320 1321 1322dnl 1323dnl Check for wide character support. Has the same effect as the option 1324dnl in gcc's configure, but in a form that autoconf can mess with. 1325dnl 1326dnl --enable-c-mbchar requests all the wchar_t stuff. 1327dnl --disable-c-mbchar doesn't. 1328dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)] 1329dnl Where DEFAULT is either `yes' or `no'. 1330dnl 1331AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [ 1332 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters]) 1333 # Option parsed, now other scripts can test enable_c_mbchar for yes/no. 1334]) 1335 1336 1337dnl 1338dnl Check to see if debugging libraries are to be built. 1339dnl 1340dnl --enable-libstdcxx-debug 1341dnl builds a separate set of debugging libraries in addition to the 1342dnl normal (shared, static) libstdc++ binaries. 1343dnl 1344dnl --disable-libstdcxx-debug 1345dnl builds only one (non-debug) version of libstdc++. 1346dnl 1347dnl --enable-libstdcxx-debug-flags=FLAGS 1348dnl iff --enable-debug == yes, then use FLAGS to build the debug library. 1349dnl 1350dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)] 1351dnl Where DEFAULT is either `yes' or `no'. 1352dnl 1353AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ 1354 AC_MSG_CHECKING([for additional debug build]) 1355 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) 1356 AC_MSG_RESULT($enable_libstdcxx_debug) 1357 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) 1358]) 1359 1360 1361dnl 1362dnl Check for explicit debug flags. 1363dnl 1364dnl --enable-libstdcxx-debug-flags='-O1' 1365dnl is a general method for passing flags to be used when 1366dnl building debug libraries with --enable-debug. 1367dnl 1368dnl --disable-libstdcxx-debug-flags does nothing. 1369dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags) 1370dnl If "default flags" is an empty string, the effect is the same 1371dnl as --disable or --enable=no. 1372dnl 1373AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [ 1374 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS], 1375 [pass compiler FLAGS when building debug library], 1376 [case "x$enable_libstdcxx_debug_flags" in 1377 xno | x) enable_libstdcxx_debug_flags= ;; 1378 x-*) ;; 1379 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 1380 esac]) 1381 1382 # Option parsed, now set things appropriately 1383 DEBUG_FLAGS="$enable_libstdcxx_debug_flags" 1384 AC_SUBST(DEBUG_FLAGS) 1385 1386 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS]) 1387]) 1388 1389 1390dnl 1391dnl Check if the user only wants a freestanding library implementation. 1392dnl 1393dnl --disable-hosted-libstdcxx will turn off most of the library build, 1394dnl installing only the headers required by [17.4.1.3] and the language 1395dnl support library. More than that will be built (to keep the Makefiles 1396dnl conveniently clean), but not installed. 1397dnl 1398dnl Sets: 1399dnl is_hosted (yes/no) 1400dnl 1401dnl Defines: 1402dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0) 1403dnl 1404AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [ 1405 AC_ARG_ENABLE([hosted-libstdcxx], 1406 AC_HELP_STRING([--disable-hosted-libstdcxx], 1407 [only build freestanding C++ runtime support]),, 1408 [enable_hosted_libstdcxx=yes]) 1409 if test "$enable_hosted_libstdcxx" = no; then 1410 AC_MSG_NOTICE([Only freestanding libraries will be built]) 1411 is_hosted=no 1412 hosted_define=0 1413 enable_abi_check=no 1414 enable_libstdcxx_pch=no 1415 else 1416 is_hosted=yes 1417 hosted_define=1 1418 fi 1419 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes) 1420 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define, 1421 [Define to 1 if a full hosted library is built, or 0 if freestanding.]) 1422]) 1423 1424 1425dnl 1426dnl Check for template specializations for the 'long long' type extension. 1427dnl The result determines only whether 'long long' I/O is enabled; things 1428dnl like numeric_limits<> specializations are always available. 1429dnl 1430dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG 1431dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined 1432dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)] 1433dnl Where DEFAULT is either `yes' or `no'. 1434dnl 1435AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [ 1436 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long']) 1437 if test $enable_long_long = yes; then 1438 AC_DEFINE(_GLIBCXX_USE_LONG_LONG) 1439 fi 1440]) 1441 1442 1443dnl 1444dnl Check to see if building and using a C++ precompiled header can be done. 1445dnl 1446dnl --enable-libstdcxx-pch=yes 1447dnl default, this shows intent to use stdc++.h.gch If it looks like it 1448dnl may work, after some light-hearted attempts to puzzle out compiler 1449dnl support, flip bits on in include/Makefile.am 1450dnl 1451dnl --disable-libstdcxx-pch 1452dnl turns off attempts to use or build stdc++.h.gch. 1453dnl 1454dnl Substs: 1455dnl glibcxx_PCHFLAGS 1456dnl 1457AC_DEFUN([GLIBCXX_ENABLE_PCH], [ 1458 AC_MSG_CHECKING([for enabled PCH]) 1459 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers]) 1460 AC_MSG_RESULT([$enable_libstdcxx_pch]) 1461 1462 if test $enable_libstdcxx_pch = yes; then 1463 AC_CACHE_CHECK([for compiler with PCH support], 1464 [glibcxx_cv_prog_CXX_pch], 1465 [ac_save_CXXFLAGS="$CXXFLAGS" 1466 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated" 1467 AC_LANG_SAVE 1468 AC_LANG_CPLUSPLUS 1469 echo '#include <math.h>' > conftest.h 1470 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \ 1471 -o conftest.h.gch 1>&5 2>&1 && 1472 echo '#error "pch failed"' > conftest.h && 1473 echo '#include "conftest.h"' > conftest.cc && 1474 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ; 1475 then 1476 glibcxx_cv_prog_CXX_pch=yes 1477 else 1478 glibcxx_cv_prog_CXX_pch=no 1479 fi 1480 rm -f conftest* 1481 CXXFLAGS=$ac_save_CXXFLAGS 1482 AC_LANG_RESTORE 1483 ]) 1484 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch 1485 fi 1486 1487 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes) 1488 if test $enable_libstdcxx_pch = yes; then 1489 glibcxx_PCHFLAGS="-include bits/stdc++.h" 1490 else 1491 glibcxx_PCHFLAGS="" 1492 fi 1493 AC_SUBST(glibcxx_PCHFLAGS) 1494]) 1495 1496 1497dnl 1498dnl Check for exception handling support. If an explicit enable/disable 1499dnl sjlj exceptions is given, we don't have to detect. Otherwise the 1500dnl target may or may not support call frame exceptions. 1501dnl 1502dnl --enable-sjlj-exceptions forces the use of builtin setjmp. 1503dnl --disable-sjlj-exceptions forces the use of call frame unwinding. 1504dnl Neither one forces an attempt at detection. 1505dnl 1506dnl Defines: 1507dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it 1508dnl 1509AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [ 1510 AC_MSG_CHECKING([for exception model to use]) 1511 AC_LANG_SAVE 1512 AC_LANG_CPLUSPLUS 1513 GLIBCXX_ENABLE(sjlj-exceptions,auto,, 1514 [force use of builtin_setjmp for exceptions], 1515 [permit yes|no|auto]) 1516 1517 if test $enable_sjlj_exceptions = auto; then 1518 # Botheration. Now we've got to detect the exception model. Link tests 1519 # against libgcc.a are problematic since we've not been given proper -L 1520 # bits for single-tree newlib and libgloss. 1521 # 1522 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style. 1523 cat > conftest.$ac_ext << EOF 1524[#]line __oline__ "configure" 1525struct S { ~S(); }; 1526void bar(); 1527void foo() 1528{ 1529 S s; 1530 bar(); 1531} 1532EOF 1533 old_CXXFLAGS="$CXXFLAGS" 1534 CXXFLAGS=-S 1535 if AC_TRY_EVAL(ac_compile); then 1536 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then 1537 enable_sjlj_exceptions=yes 1538 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then 1539 enable_sjlj_exceptions=no 1540 fi 1541 fi 1542 CXXFLAGS="$old_CXXFLAGS" 1543 rm -f conftest* 1544 fi 1545 1546 # This is a tad weird, for hysterical raisins. We have to map enable/disable 1547 # to two different models. 1548 case $enable_sjlj_exceptions in 1549 yes) 1550 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1, 1551 [Define if the compiler is configured for setjmp/longjmp exceptions.]) 1552 ac_exception_model_name=sjlj 1553 ;; 1554 no) 1555 ac_exception_model_name="call frame" 1556 ;; 1557 *) 1558 AC_MSG_ERROR([unable to detect exception model]) 1559 ;; 1560 esac 1561 AC_LANG_RESTORE 1562 AC_MSG_RESULT($ac_exception_model_name) 1563]) 1564 1565 1566dnl 1567dnl Add version tags to symbols in shared library (or not), additionally 1568dnl marking other symbols as private/local (or not). 1569dnl 1570dnl --enable-symvers=style adds a version script to the linker call when 1571dnl creating the shared library. The choice of version script is 1572dnl controlled by 'style'. 1573dnl --disable-symvers does not. 1574dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)] 1575dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to 1576dnl choose a default style based on linker characteristics. Passing 1577dnl 'no' disables versioning. 1578dnl 1579AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [ 1580 1581GLIBCXX_ENABLE(symvers,$1,[=STYLE], 1582 [enables symbol versioning of the shared library], 1583 [permit yes|no|gnu]) 1584 1585# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we 1586# don't know enough about $LD to do tricks... 1587AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES]) 1588# FIXME The following test is too strict, in theory. 1589if test $enable_shared = no || 1590 test "x$LD" = x || 1591 test x$glibcxx_gnu_ld_version = x; then 1592 enable_symvers=no 1593fi 1594 1595# Check to see if libgcc_s exists, indicating that shared libgcc is possible. 1596if test $enable_symvers != no; then 1597 AC_MSG_CHECKING([for shared libgcc]) 1598 ac_save_CFLAGS="$CFLAGS" 1599 CFLAGS=' -lgcc_s' 1600 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) 1601 CFLAGS="$ac_save_CFLAGS" 1602 if test $glibcxx_shared_libgcc = no; then 1603 cat > conftest.c <<EOF 1604int main (void) { return 0; } 1605EOF 1606changequote(,)dnl 1607 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ 1608 -shared -shared-libgcc -o conftest.so \ 1609 conftest.c -v 2>&1 >/dev/null \ 1610 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` 1611changequote([,])dnl 1612 rm -f conftest.c conftest.so 1613 if test x${glibcxx_libgcc_s_suffix+set} = xset; then 1614 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" 1615 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) 1616 CFLAGS="$ac_save_CFLAGS" 1617 fi 1618 fi 1619 AC_MSG_RESULT($glibcxx_shared_libgcc) 1620fi 1621 1622# For GNU ld, we need at least this version. The format is described in 1623# GLIBCXX_CHECK_LINKER_FEATURES above. 1624glibcxx_min_gnu_ld_version=21400 1625# XXXXXXXXXXX glibcxx_gnu_ld_version=21390 1626 1627# Check to see if unspecified "yes" value can win, given results above. 1628# Change "yes" into either "no" or a style name. 1629if test $enable_symvers = yes; then 1630 if test $with_gnu_ld = yes && 1631 test $glibcxx_shared_libgcc = yes; 1632 then 1633 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then 1634 enable_symvers=gnu 1635 else 1636 # The right tools, the right setup, but too old. Fallbacks? 1637 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for) 1638 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) 1639 AC_MSG_WARN(=== You would need to upgrade your binutils to version) 1640 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.) 1641 if test $glibcxx_gnu_ld_version -ge 21200 ; then 1642 # Globbing fix is present, proper block support is not. 1643 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.]) 1644 dnl enable_symvers=??? 1645 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 1646 enable_symvers=no 1647 else 1648 # 2.11 or older. 1649 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 1650 enable_symvers=no 1651 fi 1652 fi 1653 else 1654 # just fail for now 1655 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but]) 1656 AC_MSG_WARN([=== either you are not using a supported linker, or you are]) 1657 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).]) 1658 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 1659 enable_symvers=no 1660 fi 1661fi 1662 1663# Everything parsed; figure out what file to use. 1664case $enable_symvers in 1665 no) 1666 SYMVER_MAP=config/linker-map.dummy 1667 ;; 1668 gnu) 1669 SYMVER_MAP=config/linker-map.gnu 1670 AC_DEFINE(_GLIBCXX_SYMVER) 1671 ;; 1672esac 1673 1674AC_SUBST(SYMVER_MAP) 1675AC_SUBST(port_specific_symbol_files) 1676GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no) 1677AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) 1678]) 1679 1680 1681dnl 1682dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. 1683dnl We must stage the required headers so that they will be installed 1684dnl with the library (unlike libgcc, the STL implementation is provided 1685dnl solely within headers). Since we must not inject random user-space 1686dnl macro names into user-provided C++ code, we first stage into <file>-in 1687dnl and process to <file> with an output command. The reason for a two- 1688dnl stage process here is to correctly handle $srcdir!=$objdir without 1689dnl having to write complex code (the sed commands to clean the macro 1690dnl namespace are complex and fragile enough as it is). We must also 1691dnl add a relative path so that -I- is supported properly. 1692dnl 1693dnl Substs: 1694dnl glibcxx_thread_h 1695dnl 1696dnl Defines: 1697dnl HAVE_GTHR_DEFAULT 1698dnl 1699AC_DEFUN([GLIBCXX_ENABLE_THREADS], [ 1700 AC_MSG_CHECKING([for thread model used by GCC]) 1701 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 1702 AC_MSG_RESULT([$target_thread_file]) 1703 1704 if test $target_thread_file != single; then 1705 AC_DEFINE(HAVE_GTHR_DEFAULT) 1706 fi 1707 1708 glibcxx_thread_h=gthr-$target_thread_file.h 1709 AC_SUBST(glibcxx_thread_h) 1710]) 1711 1712 1713# Check whether LC_MESSAGES is available in <locale.h>. 1714# Ulrich Drepper <drepper@cygnus.com>, 1995. 1715# 1716# This file file be copied and used freely without restrictions. It can 1717# be used in projects which are not available under the GNU Public License 1718# but which still want to provide support for the GNU gettext functionality. 1719# Please note that the actual code is *not* freely available. 1720 1721# serial 1 1722AC_DEFUN([AC_LC_MESSAGES], [ 1723 AC_CHECK_HEADER(locale.h, [ 1724 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, 1725 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES], 1726 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) 1727 if test $ac_cv_val_LC_MESSAGES = yes; then 1728 AC_DEFINE(HAVE_LC_MESSAGES) 1729 fi 1730 ]) 1731]) 1732 1733 1734sinclude([../libtool.m4]) 1735dnl The lines below arrange for aclocal not to bring an installed 1736dnl libtool.m4 into aclocal.m4, while still arranging for automake to 1737dnl add a definition of LIBTOOL to Makefile.in. 1738ifelse(,,,[AC_SUBST(LIBTOOL) 1739AC_DEFUN([AM_PROG_LIBTOOL]) 1740AC_DEFUN([AC_LIBTOOL_DLOPEN]) 1741AC_DEFUN([AC_PROG_LD]) 1742]) 1743 1744dnl vim:et:ts=2:sw=2 1745