1 # Process this file with autoreconf to produce a configure script.
4 AC_INIT(package-unused, version-unused,, libstdc++)
5 AC_CONFIG_SRCDIR(src/shared/hashtable-aux.cc)
6 AC_CONFIG_HEADER(config.h)
8 # This works around the fact that libtool configuration may change LD
9 # for this particular configuration, but some shells, instead of
10 # keeping the changes in LD private, export them just because LD is
11 # exported. Only used at the end of this file.
12 ### am handles this now? ORIGINAL_LD_FOR_MULTILIBS=$LD
14 # Find the rest of the source tree framework.
15 AM_ENABLE_MULTILIB(, ..)
17 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
19 # You will slowly go insane if you do not grok the following fact: when
20 # building v3 as part of the compiler, the top-level /target/ becomes the
21 # library's /host/. configure then causes --target to default to --host,
22 # exactly like any other package using autoconf. Therefore, 'target' and
23 # 'host' will always be the same. This makes sense both for native and
24 # cross compilers, just think about it for a little while. :-)
26 # Also, if v3 is being configured as part of a cross compiler, the top-level
27 # configure script will pass the "real" host as $with_cross_host.
29 # Do not delete or change the following two lines. For why, see
30 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
32 target_alias=${target_alias-$host_alias}
34 # Handy for debugging:
35 #AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
37 if test "$build" != "$host"; then
38 # We are being configured with some form of cross compiler.
39 GLIBCXX_IS_NATIVE=false
40 case "$host","$target" in
41 # Darwin crosses can use the host system's libraries and headers,
42 # because of the fat library support. Of course, it must be the
43 # same version of Darwin on both sides. Allow the user to
44 # just say --target=foo-darwin without a version number to mean
45 # "the version on this system".
46 *-*-darwin*,*-*-darwin*)
47 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
48 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
49 if test $hostos = $targetos -o $targetos = darwin ; then
50 GLIBCXX_IS_NATIVE=true
59 GLIBCXX_IS_NATIVE=true
62 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
63 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
64 # 1.x: minimum required version
65 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
66 # of other PACKAGE_* variables will, however, and there's nothing
67 # we can do about that; they come from AC_INIT).
68 # foreign: we don't follow the normal rules for GNU packages (no COPYING
69 # file in the top srcdir, etc, etc), so stop complaining.
70 # no-dependencies: turns off auto dependency generation (just for now)
71 # no-dist: we don't want 'dist' and related rules.
72 # -Wall: turns on all automake warnings...
73 # -Wno-portability: ...except this one, since GNU make is now required.
74 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies no-dist -Wall -Wno-portability -Wno-override])
75 AH_TEMPLATE(PACKAGE, [Name of package])
76 AH_TEMPLATE(VERSION, [Version number of package])
78 # -fno-builtin must be present here so that a non-conflicting form of
79 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
81 save_CXXFLAGS="$CXXFLAGS"
82 CXXFLAGS="$CXXFLAGS -fno-builtin"
85 CXXFLAGS="$save_CXXFLAGS"
87 # Runs configure.host, and assorted other critical bits. Sets
88 # up critical shell variables.
92 if test "x${with_newlib}" != "xyes"; then
97 AC_SUBST(enable_shared)
98 AC_SUBST(enable_static)
100 if test "$enable_vtable_verify" = yes; then
101 predep_objects_CXX="${predep_objects_CXX} ${glibcxx_builddir}/../libgcc/vtv_start.o"
102 postdep_objects_CXX="${postdep_objects_CXX} ${glibcxx_builddir}/../libgcc/vtv_end.o"
106 # libtool variables for C++ shared and position-independent compiles.
108 # Use glibcxx_lt_pic_flag to designate the automake variable
109 # used to encapsulate the default libtool approach to creating objects
110 # with position-independent code. Default: -prefer-pic.
112 # Use glibcxx_compiler_shared_flag to designate a compile-time flags for
113 # creating shared objects. Default: -D_GLIBCXX_SHARED.
115 # Use glibcxx_compiler_pic_flag to designate a compile-time flags for
116 # creating position-independent objects. This varies with the target
117 # hardware and operating system, but is often: -DPIC -fPIC.
118 if test "$enable_shared" = yes; then
119 glibcxx_lt_pic_flag="-prefer-pic"
120 glibcxx_compiler_pic_flag="$lt_prog_compiler_pic_CXX"
121 glibcxx_compiler_shared_flag="-D_GLIBCXX_SHARED"
125 glibcxx_compiler_pic_flag=
126 glibcxx_compiler_shared_flag=
128 AC_SUBST(glibcxx_lt_pic_flag)
129 AC_SUBST(glibcxx_compiler_pic_flag)
130 AC_SUBST(glibcxx_compiler_shared_flag)
132 # Override the libtool's pic_flag and pic_mode.
133 # Do this step after AM_PROG_LIBTOOL, but before AC_OUTPUT.
134 # NB: this impacts --with-pic and --without-pic.
135 lt_prog_compiler_pic_CXX="$glibcxx_compiler_pic_flag $glibcxx_compiler_shared_flag"
138 # Eliminate -lstdc++ addition to postdeps for cross compiles.
139 postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'`
141 # Possibly disable most of the library.
142 ## TODO: Consider skipping unncessary tests altogether in this case, rather
143 ## than just ignoring the results. Faster /and/ more correct, win win.
144 GLIBCXX_ENABLE_HOSTED
146 # Enable descriptive messages to standard output on termination.
147 GLIBCXX_ENABLE_VERBOSE
149 # Enable compiler support that doesn't require linking.
150 GLIBCXX_ENABLE_PCH($is_hosted)
151 GLIBCXX_ENABLE_THREADS
152 GLIBCXX_ENABLE_ATOMIC_BUILTINS
153 GLIBCXX_ENABLE_DECIMAL_FLOAT
154 GLIBCXX_ENABLE_INT128_FLOAT128
155 if test "$enable_float128" = yes; then
156 port_specific_symbol_files="$port_specific_symbol_files \$(top_srcdir)/config/abi/pre/float128.ver"
159 # Checks for compiler support that doesn't require linking.
160 GLIBCXX_CHECK_COMPILER_FEATURES
162 # Enable all the variable C++ runtime options that don't require linking.
163 GLIBCXX_ENABLE_CSTDIO
164 GLIBCXX_ENABLE_CLOCALE
165 GLIBCXX_ENABLE_ALLOCATOR
166 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
167 GLIBCXX_ENABLE_LONG_LONG([yes])
168 GLIBCXX_ENABLE_WCHAR_T([yes])
169 GLIBCXX_ENABLE_C99([yes])
170 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
171 GLIBCXX_ENABLE_DEBUG_FLAGS(["-gdwarf-4 -g3 -O0"])
172 GLIBCXX_ENABLE_DEBUG([no])
173 GLIBCXX_ENABLE_PARALLEL([yes])
174 GLIBCXX_ENABLE_CXX_FLAGS
175 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
176 GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes])
177 GLIBCXX_ENABLE_PYTHON
178 GLIBCXX_ENABLE_WERROR([yes])
179 GLIBCXX_ENABLE_VTABLE_VERIFY([no])
181 # Checks for operating systems support that doesn't require linking.
182 GLIBCXX_CHECK_STDIO_PROTO
183 GLIBCXX_CHECK_MATH11_PROTO
184 GLIBCXX_CHECK_SYSTEM_ERROR
185 GLIBCXX_CHECK_UCHAR_H
187 # For the streamoff typedef.
188 GLIBCXX_CHECK_INT64_T
193 # For showmanyc_helper().
194 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
196 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
199 AC_CHECK_HEADERS(sys/uio.h)
202 # Check for fenv.h and complex.h before GLIBCXX_CHECK_C99_TR1
203 # so that the check is done with the C compiler (not C++).
204 # Checking with C++ can break a canadian cross build if either
205 # file does not exist in C but does in C++.
206 AC_CHECK_HEADERS(fenv.h complex.h)
208 # For C99 support to TR1.
209 GLIBCXX_CHECK_C99_TR1
211 # For the EOF, SEEK_CUR, and SEEK_END integer constants.
212 GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS
214 # For gettimeofday support.
215 GLIBCXX_CHECK_GETTIMEOFDAY
217 # For clock_gettime, nanosleep and sched_yield support.
218 GLIBCXX_ENABLE_LIBSTDCXX_TIME
220 # Check for tmpnam which is obsolescent in POSIX.1-2008
225 # For hardware_concurrency
226 AC_CHECK_HEADERS(sys/sysinfo.h)
227 GLIBCXX_CHECK_GET_NPROCS
228 AC_CHECK_HEADERS(unistd.h)
229 GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
230 GLIBCXX_CHECK_SC_NPROC_ONLN
231 GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
232 GLIBCXX_CHECK_SYSCTL_HW_NCPU
235 # Check for available headers.
236 AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
237 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
238 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
239 sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
240 wchar.h wctype.h linux/random.h])
242 # Only do link tests if native. Else, hardcode.
243 if $GLIBCXX_IS_NATIVE; then
245 # We can do more elaborate tests that assume a working linker.
248 GLIBCXX_CHECK_LINKER_FEATURES
249 GLIBCXX_CHECK_MATH_SUPPORT
250 GLIBCXX_CHECK_STDLIB_SUPPORT
252 # For /dev/random and /dev/urandom for TR1.
253 GLIBCXX_CHECK_RANDOM_TR1
258 AC_CHECK_FUNCS(__cxa_thread_atexit_impl __cxa_thread_atexit)
259 AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign _aligned_malloc)
266 # This lets us hard-code the functionality we know we'll have in the cross
267 # target environment. "Let" is a sugar-coated word placed on an especially
268 # dull and tedious hack, actually.
270 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
271 # that involve linking, can't be used:
272 # "cannot open sim-crt0.o"
273 # "cannot open crt0.o"
274 # etc. All this is because there currently exists no unified, consistent
275 # way for top level CC information to be passed down to target directories:
276 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
277 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
278 # crosses can be removed.
280 # If Canadian cross, then don't pick up tools from the build directory.
281 # Used only in GLIBCXX_EXPORT_INCLUDES.
282 if test -n "$with_cross_host" &&
283 test x"$build_alias" != x"$with_cross_host" &&
284 test x"$build" != x"$target";
291 # Construct crosses by hand, eliminating bits that need ld...
292 # GLIBCXX_CHECK_MATH_SUPPORT
294 # First, test for "known" system libraries. We may be using newlib even
295 # on a hosted environment.
296 if test "x${with_newlib}" = "xyes"; then
297 os_include_dir="os/newlib"
298 AC_DEFINE(HAVE_HYPOT)
300 # GLIBCXX_CHECK_STDLIB_SUPPORT
301 AC_DEFINE(HAVE_STRTOF)
303 AC_DEFINE(HAVE_ACOSF)
304 AC_DEFINE(HAVE_ASINF)
305 AC_DEFINE(HAVE_ATAN2F)
306 AC_DEFINE(HAVE_ATANF)
307 AC_DEFINE(HAVE_CEILF)
309 AC_DEFINE(HAVE_COSHF)
311 AC_DEFINE(HAVE_FABSF)
312 AC_DEFINE(HAVE_FLOORF)
313 AC_DEFINE(HAVE_FMODF)
314 AC_DEFINE(HAVE_FREXPF)
315 AC_DEFINE(HAVE_LDEXPF)
316 AC_DEFINE(HAVE_LOG10F)
318 AC_DEFINE(HAVE_MODFF)
321 AC_DEFINE(HAVE_SINHF)
322 AC_DEFINE(HAVE_SQRTF)
324 AC_DEFINE(HAVE_TANHF)
326 AC_DEFINE(HAVE_ICONV)
327 AC_DEFINE(HAVE_MEMALIGN)
332 # At some point, we should differentiate between architectures
333 # like x86, which have long double versions, and alpha/powerpc/etc.,
334 # which don't. For the time being, punt.
335 if test x"long_double_math_on_this_cpu" = x"yes"; then
336 AC_DEFINE(HAVE_ACOSL)
337 AC_DEFINE(HAVE_ASINL)
338 AC_DEFINE(HAVE_ATAN2L)
339 AC_DEFINE(HAVE_ATANL)
340 AC_DEFINE(HAVE_CEILL)
342 AC_DEFINE(HAVE_COSHL)
344 AC_DEFINE(HAVE_FABSL)
345 AC_DEFINE(HAVE_FLOORL)
346 AC_DEFINE(HAVE_FMODL)
347 AC_DEFINE(HAVE_FREXPL)
348 AC_DEFINE(HAVE_LDEXPL)
349 AC_DEFINE(HAVE_LOG10L)
351 AC_DEFINE(HAVE_MODFL)
353 AC_DEFINE(HAVE_SINCOSL)
355 AC_DEFINE(HAVE_SINHL)
356 AC_DEFINE(HAVE_SQRTL)
358 AC_DEFINE(HAVE_TANHL)
362 # Check for _Unwind_GetIPInfo.
363 GCC_CHECK_UNWIND_GETIPINFO
365 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
367 GCC_HEADER_STDINT(include/gstdint.h)
369 GLIBCXX_ENABLE_SYMVERS([yes])
370 AC_SUBST(libtool_VERSION)
372 GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes])
374 GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI([yes])
378 LONG_DOUBLE_COMPAT_FLAGS="-mlong-double-64"
380 powerpc*-*-linux* | \
385 #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
386 #error no need for long double compatibility
388 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
389 if test "$ac_ldbl_compat" = yes; then
390 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
391 [Define if compatibility should be provided for -mlong-double-64.])
392 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
395 LONG_DOUBLE_COMPAT_FLAGS="$LONG_DOUBLE_COMPAT_FLAGS -mno-gnu-attribute" ;;
399 AC_SUBST(LONG_DOUBLE_COMPAT_FLAGS)
400 GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
402 # Check if assembler supports disabling hardware capability support.
403 GCC_CHECK_ASSEMBLER_HWCAP
405 # Check if assembler supports rdrand opcode.
406 GLIBCXX_CHECK_X86_RDRAND
408 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
409 GLIBCXX_CONFIGURE_TESTSUITE
411 # For gthread support. Depends on GLIBCXX_ENABLE_SYMVERS.
412 GLIBCXX_CHECK_GTHREADS
415 AC_CHECK_HEADERS([fcntl.h dirent.h sys/statvfs.h utime.h])
416 GLIBCXX_ENABLE_FILESYSTEM_TS
417 GLIBCXX_CHECK_FILESYSTEM_DEPS
419 # For Transactional Memory TS
420 GLIBCXX_CHECK_SIZE_T_MANGLING
422 # Check which release added std::exception_ptr for the target
423 GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER
425 # Define documentation rules conditionally.
427 # See if makeinfo has been installed and is modern enough
428 # that we can use it.
429 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
430 [GNU texinfo.* \([0-9][0-9.]*\)],
431 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
432 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
435 AC_CHECK_PROG([DOXYGEN], doxygen, yes, no)
436 AC_CHECK_PROG([DOT], dot, yes, no)
439 AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no)
440 AC_CHECK_PROG([XMLLINT], xmllint, yes, no)
441 GLIBCXX_CONFIGURE_DOCBOOK
443 # Check for xml/html dependencies.
444 AM_CONDITIONAL(BUILD_XML,
445 test $ac_cv_prog_DOXYGEN = "yes" &&
446 test $ac_cv_prog_DOT = "yes" &&
447 test $ac_cv_prog_XSLTPROC = "yes" &&
448 test $ac_cv_prog_XMLLINT = "yes" &&
449 test $glibcxx_stylesheets = "yes")
451 AM_CONDITIONAL(BUILD_HTML,
452 test $ac_cv_prog_DOXYGEN = "yes" &&
453 test $ac_cv_prog_DOT = "yes" &&
454 test $ac_cv_prog_XSLTPROC = "yes" &&
455 test $ac_cv_prog_XMLLINT = "yes" &&
456 test $glibcxx_stylesheets = "yes")
458 # Check for man dependencies.
459 AM_CONDITIONAL(BUILD_MAN,
460 test $ac_cv_prog_DOXYGEN = "yes" &&
461 test $ac_cv_prog_DOT = "yes")
463 # Check for pdf dependencies.
464 AC_CHECK_PROG([DBLATEX], dblatex, yes, no)
465 AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no)
466 AM_CONDITIONAL(BUILD_PDF,
467 test $ac_cv_prog_DBLATEX = "yes" &&
468 test $ac_cv_prog_PDFLATEX = "yes")
471 # Propagate the target-specific source directories through the build chain.
472 ATOMICITY_SRCDIR=config/${atomicity_dir}
473 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
474 ATOMIC_FLAGS=${atomic_flags}
475 CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
476 OS_INC_SRCDIR=config/${os_include_dir}
477 ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
478 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
479 CPU_OPT_EXT_RANDOM=config/${cpu_opt_ext_random}
480 CPU_OPT_BITS_RANDOM=config/${cpu_opt_bits_random}
481 AC_SUBST(ATOMICITY_SRCDIR)
482 AC_SUBST(ATOMIC_WORD_SRCDIR)
483 AC_SUBST(ATOMIC_FLAGS)
484 AC_SUBST(CPU_DEFINES_SRCDIR)
485 AC_SUBST(ABI_TWEAKS_SRCDIR)
486 AC_SUBST(OS_INC_SRCDIR)
487 AC_SUBST(ERROR_CONSTANTS_SRCDIR)
488 AC_SUBST(CPU_OPT_EXT_RANDOM)
489 AC_SUBST(CPU_OPT_BITS_RANDOM)
492 # Determine cross-compile flags and AM_CONDITIONALs.
493 #AC_SUBST(GLIBCXX_IS_NATIVE)
494 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
495 GLIBCXX_EVALUATE_CONDITIONALS
499 if test ${multilib} = yes; then
500 multilib_arg="--enable-multilib"
505 # Export all the install information.
506 GLIBCXX_EXPORT_INSTALL_INFO
508 # Export all the include and flag information to Makefiles.
509 GLIBCXX_EXPORT_INCLUDES
512 # Determine what GCC version number to use in filesystem paths.
515 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
516 dnl which can all be called multiple times as needed, plus one (different)
517 dnl AC_OUTPUT macro. This one lists the files to be created:
518 AC_CONFIG_FILES(Makefile)
519 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
520 AC_CONFIG_FILES([scripts/extract_symvers],[chmod +x scripts/extract_symvers])
521 AC_CONFIG_FILES([doc/xsl/customization.xsl])
523 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
524 # that multilib installs will end up installed in the correct place.
525 # The testsuite needs it for multilib-aware ABI baseline files.
526 # To work around this not being passed down from config-ml.in ->
527 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
528 # append it here. Only modify Makefiles that have just been created.
530 # Also, get rid of this simulated-VPATH thing that automake does.
531 AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
532 [cat > vpsed$$ << \_EOF
533 s!`test -f '$<' || echo '$(srcdir)/'`!!
535 sed -f vpsed$$ $ac_file > tmp$$
538 echo 'MULTISUBDIR =' >> $ac_file
540 . ${multi_basedir}/config-ml.in
541 AS_UNSET([ml_norecursion])
544 AC_CONFIG_COMMANDS([generate-headers],
545 [(cd include && ${MAKE-make} pch_build= )])
547 dnl And this actually makes things happen: