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 " $postdeps_CXX " | sed 's, -lstdc++ ,,g'`
141 # Possibly disable most of the library.
142 ## TODO: Consider skipping unncessary tests altogether in this case, rather
143 ## than just ignoring the results. Faster /and/ more correct, win win.
144 GLIBCXX_ENABLE_HOSTED
146 # Enable descriptive messages to standard output on termination.
147 GLIBCXX_ENABLE_VERBOSE
149 # Enable compiler support that doesn't require linking.
150 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
151 GLIBCXX_ENABLE_PCH($is_hosted)
152 GLIBCXX_ENABLE_THREADS
153 GLIBCXX_ENABLE_ATOMIC_BUILTINS
154 GLIBCXX_ENABLE_DECIMAL_FLOAT
155 GLIBCXX_ENABLE_INT128_FLOAT128
157 # Checks for compiler support that doesn't require linking.
158 GLIBCXX_CHECK_COMPILER_FEATURES
160 # Enable all the variable C++ runtime options that don't require linking.
161 GLIBCXX_ENABLE_CSTDIO
162 GLIBCXX_ENABLE_CLOCALE
163 GLIBCXX_ENABLE_ALLOCATOR
164 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
165 GLIBCXX_ENABLE_LONG_LONG([yes])
166 GLIBCXX_ENABLE_WCHAR_T([yes])
167 GLIBCXX_ENABLE_C99([yes])
168 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
169 GLIBCXX_ENABLE_DEBUG_FLAGS(["-gdwarf-4 -g3 -O0"])
170 GLIBCXX_ENABLE_DEBUG([no])
171 GLIBCXX_ENABLE_PARALLEL([yes])
172 GLIBCXX_ENABLE_CXX_FLAGS
173 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
174 GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes])
175 GLIBCXX_ENABLE_PYTHON
176 GLIBCXX_ENABLE_WERROR([yes])
177 GLIBCXX_ENABLE_VTABLE_VERIFY([no])
179 # Checks for operating systems support that doesn't require linking.
180 GLIBCXX_CHECK_STDIO_PROTO
181 GLIBCXX_CHECK_SYSTEM_ERROR
183 # For the streamoff typedef.
184 GLIBCXX_CHECK_INT64_T
189 # For showmanyc_helper().
190 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
192 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
195 AC_CHECK_HEADERS(sys/uio.h)
198 # Check for fenv.h and complex.h before GLIBCXX_CHECK_C99_TR1
199 # so that the check is done with the C compiler (not C++).
200 # Checking with C++ can break a canadian cross build if either
201 # file does not exist in C but does in C++.
202 AC_CHECK_HEADERS(fenv.h complex.h)
204 # For C99 support to TR1.
205 GLIBCXX_CHECK_C99_TR1
207 # For the EOF, SEEK_CUR, and SEEK_END integer constants.
208 GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS
210 # For gettimeofday support.
211 GLIBCXX_CHECK_GETTIMEOFDAY
213 # For clock_gettime, nanosleep and sched_yield support.
214 GLIBCXX_ENABLE_LIBSTDCXX_TIME
216 # Check for tmpnam which is obsolescent in POSIX.1-2008
221 # For hardware_concurrency
222 AC_CHECK_HEADERS(sys/sysinfo.h)
223 GLIBCXX_CHECK_GET_NPROCS
224 AC_CHECK_HEADERS(unistd.h)
225 GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
226 GLIBCXX_CHECK_SC_NPROC_ONLN
227 GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
228 GLIBCXX_CHECK_SYSCTL_HW_NCPU
231 # Check for available headers.
232 AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
233 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
234 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
235 sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
238 # Only do link tests if native. Else, hardcode.
239 if $GLIBCXX_IS_NATIVE; then
241 # We can do more elaborate tests that assume a working linker.
244 GLIBCXX_CHECK_LINKER_FEATURES
245 GLIBCXX_CHECK_MATH_SUPPORT
246 GLIBCXX_CHECK_STDLIB_SUPPORT
248 # For /dev/random and /dev/urandom for TR1.
249 GLIBCXX_CHECK_RANDOM_TR1
254 AC_CHECK_FUNCS(__cxa_thread_atexit_impl)
261 # This lets us hard-code the functionality we know we'll have in the cross
262 # target environment. "Let" is a sugar-coated word placed on an especially
263 # dull and tedious hack, actually.
265 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
266 # that involve linking, can't be used:
267 # "cannot open sim-crt0.o"
268 # "cannot open crt0.o"
269 # etc. All this is because there currently exists no unified, consistent
270 # way for top level CC information to be passed down to target directories:
271 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
272 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
273 # crosses can be removed.
275 # If Canadian cross, then don't pick up tools from the build directory.
276 # Used only in GLIBCXX_EXPORT_INCLUDES.
277 if test -n "$with_cross_host" &&
278 test x"$build_alias" != x"$with_cross_host" &&
279 test x"$build" != x"$target";
286 # Construct crosses by hand, eliminating bits that need ld...
287 # GLIBCXX_CHECK_MATH_SUPPORT
289 # First, test for "known" system libraries. We may be using newlib even
290 # on a hosted environment.
291 if test "x${with_newlib}" = "xyes"; then
292 os_include_dir="os/newlib"
293 AC_DEFINE(HAVE_HYPOT)
295 # GLIBCXX_CHECK_STDLIB_SUPPORT
296 AC_DEFINE(HAVE_STRTOF)
298 AC_DEFINE(HAVE_ACOSF)
299 AC_DEFINE(HAVE_ASINF)
300 AC_DEFINE(HAVE_ATAN2F)
301 AC_DEFINE(HAVE_ATANF)
302 AC_DEFINE(HAVE_CEILF)
304 AC_DEFINE(HAVE_COSHF)
306 AC_DEFINE(HAVE_FABSF)
307 AC_DEFINE(HAVE_FLOORF)
308 AC_DEFINE(HAVE_FMODF)
309 AC_DEFINE(HAVE_FREXPF)
310 AC_DEFINE(HAVE_LDEXPF)
311 AC_DEFINE(HAVE_LOG10F)
313 AC_DEFINE(HAVE_MODFF)
316 AC_DEFINE(HAVE_SINHF)
317 AC_DEFINE(HAVE_SQRTF)
319 AC_DEFINE(HAVE_TANHF)
321 AC_DEFINE(HAVE_ICONV)
326 # At some point, we should differentiate between architectures
327 # like x86, which have long double versions, and alpha/powerpc/etc.,
328 # which don't. For the time being, punt.
329 if test x"long_double_math_on_this_cpu" = x"yes"; then
330 AC_DEFINE(HAVE_ACOSL)
331 AC_DEFINE(HAVE_ASINL)
332 AC_DEFINE(HAVE_ATAN2L)
333 AC_DEFINE(HAVE_ATANL)
334 AC_DEFINE(HAVE_CEILL)
336 AC_DEFINE(HAVE_COSHL)
338 AC_DEFINE(HAVE_FABSL)
339 AC_DEFINE(HAVE_FLOORL)
340 AC_DEFINE(HAVE_FMODL)
341 AC_DEFINE(HAVE_FREXPL)
342 AC_DEFINE(HAVE_LDEXPL)
343 AC_DEFINE(HAVE_LOG10L)
345 AC_DEFINE(HAVE_MODFL)
347 AC_DEFINE(HAVE_SINCOSL)
349 AC_DEFINE(HAVE_SINHL)
350 AC_DEFINE(HAVE_SQRTL)
352 AC_DEFINE(HAVE_TANHL)
356 # Check for _Unwind_GetIPInfo.
357 GCC_CHECK_UNWIND_GETIPINFO
359 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
361 GCC_HEADER_STDINT(include/gstdint.h)
363 GLIBCXX_ENABLE_SYMVERS([yes])
364 AC_SUBST(libtool_VERSION)
366 GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes])
370 powerpc*-*-linux* | \
375 #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
376 #error no need for long double compatibility
378 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
379 if test "$ac_ldbl_compat" = yes; then
380 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
381 [Define if compatibility should be provided for -mlong-double-64.])
382 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
385 GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
387 # Check if assembler supports disabling hardware capability support.
388 GLIBCXX_CHECK_ASSEMBLER_HWCAP
390 # Check if assembler supports rdrand opcode.
391 GLIBCXX_CHECK_X86_RDRAND
393 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
394 GLIBCXX_CONFIGURE_TESTSUITE
396 # For gthread support. Depends on GLIBCXX_ENABLE_SYMVERS.
397 GLIBCXX_CHECK_GTHREADS
399 # Define documentation rules conditionally.
401 # See if makeinfo has been installed and is modern enough
402 # that we can use it.
403 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
404 [GNU texinfo.* \([0-9][0-9.]*\)],
405 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
406 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
409 AC_CHECK_PROG([DOXYGEN], doxygen, yes, no)
410 AC_CHECK_PROG([DOT], dot, yes, no)
413 AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no)
414 AC_CHECK_PROG([XMLLINT], xmllint, yes, no)
415 GLIBCXX_CONFIGURE_DOCBOOK
417 # Check for xml/html dependencies.
418 AM_CONDITIONAL(BUILD_XML,
419 test $ac_cv_prog_DOXYGEN = "yes" &&
420 test $ac_cv_prog_DOT = "yes" &&
421 test $ac_cv_prog_XSLTPROC = "yes" &&
422 test $ac_cv_prog_XMLLINT = "yes" &&
423 test $glibcxx_stylesheets = "yes")
425 AM_CONDITIONAL(BUILD_HTML,
426 test $ac_cv_prog_DOXYGEN = "yes" &&
427 test $ac_cv_prog_DOT = "yes" &&
428 test $ac_cv_prog_XSLTPROC = "yes" &&
429 test $ac_cv_prog_XMLLINT = "yes" &&
430 test $glibcxx_stylesheets = "yes")
432 # Check for man dependencies.
433 AM_CONDITIONAL(BUILD_MAN,
434 test $ac_cv_prog_DOXYGEN = "yes" &&
435 test $ac_cv_prog_DOT = "yes")
437 # Check for pdf dependencies.
438 AC_CHECK_PROG([DBLATEX], dblatex, yes, no)
439 AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no)
440 AM_CONDITIONAL(BUILD_PDF,
441 test $ac_cv_prog_DBLATEX = "yes" &&
442 test $ac_cv_prog_PDFLATEX = "yes")
445 # Propagate the target-specific source directories through the build chain.
446 ATOMICITY_SRCDIR=config/${atomicity_dir}
447 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
448 ATOMIC_FLAGS=${atomic_flags}
449 CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
450 OS_INC_SRCDIR=config/${os_include_dir}
451 ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
452 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
453 CPU_OPT_EXT_RANDOM=config/${cpu_opt_ext_random}
454 CPU_OPT_BITS_RANDOM=config/${cpu_opt_bits_random}
455 AC_SUBST(ATOMICITY_SRCDIR)
456 AC_SUBST(ATOMIC_WORD_SRCDIR)
457 AC_SUBST(ATOMIC_FLAGS)
458 AC_SUBST(CPU_DEFINES_SRCDIR)
459 AC_SUBST(ABI_TWEAKS_SRCDIR)
460 AC_SUBST(OS_INC_SRCDIR)
461 AC_SUBST(ERROR_CONSTANTS_SRCDIR)
462 AC_SUBST(CPU_OPT_EXT_RANDOM)
463 AC_SUBST(CPU_OPT_BITS_RANDOM)
466 # Determine cross-compile flags and AM_CONDITIONALs.
467 #AC_SUBST(GLIBCXX_IS_NATIVE)
468 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
469 GLIBCXX_EVALUATE_CONDITIONALS
473 if test ${multilib} = yes; then
474 multilib_arg="--enable-multilib"
479 # Export all the install information.
480 GLIBCXX_EXPORT_INSTALL_INFO
482 # Export all the include and flag information to Makefiles.
483 GLIBCXX_EXPORT_INCLUDES
486 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
487 dnl which can all be called multiple times as needed, plus one (different)
488 dnl AC_OUTPUT macro. This one lists the files to be created:
489 AC_CONFIG_FILES(Makefile)
490 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
491 AC_CONFIG_FILES([scripts/extract_symvers],[chmod +x scripts/extract_symvers])
492 AC_CONFIG_FILES([doc/xsl/customization.xsl])
494 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
495 # that multilib installs will end up installed in the correct place.
496 # The testsuite needs it for multilib-aware ABI baseline files.
497 # To work around this not being passed down from config-ml.in ->
498 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
499 # append it here. Only modify Makefiles that have just been created.
501 # Also, get rid of this simulated-VPATH thing that automake does.
502 AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
503 [cat > vpsed$$ << \_EOF
504 s!`test -f '$<' || echo '$(srcdir)/'`!!
506 sed -f vpsed$$ $ac_file > tmp$$
509 echo 'MULTISUBDIR =' >> $ac_file
511 . ${multi_basedir}/config-ml.in
512 AS_UNSET([ml_norecursion])
515 AC_CONFIG_COMMANDS([generate-headers],
516 [(cd include && ${MAKE-make} pch_build= )])
518 dnl And this actually makes things happen: