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${with_newlib}" != "xyes"; then
97 AC_SUBST(enable_shared)
98 AC_SUBST(enable_static)
100 # libtool variables for C++ shared and position-independent compiles.
102 # Use glibcxx_lt_pic_flag to designate the automake variable
103 # used to encapsulate the default libtool approach to creating objects
104 # with position-independent code. Default: -prefer-pic.
106 # Use glibcxx_compiler_shared_flag to designate a compile-time flags for
107 # creating shared objects. Default: -D_GLIBCXX_SHARED.
109 # Use glibcxx_compiler_pic_flag to designate a compile-time flags for
110 # creating position-independent objects. This varies with the target
111 # hardware and operating system, but is often: -DPIC -fPIC.
112 if test "$enable_shared" = yes; then
113 glibcxx_lt_pic_flag="-prefer-pic"
114 glibcxx_compiler_pic_flag="$lt_prog_compiler_pic_CXX"
115 glibcxx_compiler_shared_flag="-D_GLIBCXX_SHARED"
119 glibcxx_compiler_pic_flag=
120 glibcxx_compiler_shared_flag=
122 AC_SUBST(glibcxx_lt_pic_flag)
123 AC_SUBST(glibcxx_compiler_pic_flag)
124 AC_SUBST(glibcxx_compiler_shared_flag)
126 # Override the libtool's pic_flag and pic_mode.
127 # Do this step after AM_PROG_LIBTOOL, but before AC_OUTPUT.
128 # NB: this impacts --with-pic and --without-pic.
129 lt_prog_compiler_pic_CXX="$glibcxx_compiler_pic_flag $glibcxx_compiler_shared_flag"
132 # Eliminate -lstdc++ addition to postdeps for cross compiles.
133 postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'`
135 # Possibly disable most of the library.
136 ## TODO: Consider skipping unncessary tests altogether in this case, rather
137 ## than just ignoring the results. Faster /and/ more correct, win win.
138 GLIBCXX_ENABLE_HOSTED
140 # Enable descriptive messages to standard output on termination.
141 GLIBCXX_ENABLE_VERBOSE
143 # Enable compiler support that doesn't require linking.
144 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
145 GLIBCXX_ENABLE_PCH($is_hosted)
146 GLIBCXX_ENABLE_THREADS
147 GLIBCXX_ENABLE_ATOMIC_BUILTINS
148 GLIBCXX_ENABLE_DECIMAL_FLOAT
149 GLIBCXX_ENABLE_INT128_FLOAT128
151 # Checks for compiler support that doesn't require linking.
152 GLIBCXX_CHECK_COMPILER_FEATURES
154 # Enable all the variable C++ runtime options that don't require linking.
155 GLIBCXX_ENABLE_CSTDIO
156 GLIBCXX_ENABLE_CLOCALE
157 GLIBCXX_ENABLE_ALLOCATOR
158 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
159 GLIBCXX_ENABLE_LONG_LONG([yes])
160 GLIBCXX_ENABLE_WCHAR_T([yes])
161 GLIBCXX_ENABLE_C99([yes])
162 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
163 GLIBCXX_ENABLE_DEBUG_FLAGS(["-gdwarf-4 -g3 -O0"])
164 GLIBCXX_ENABLE_DEBUG([no])
165 GLIBCXX_ENABLE_PARALLEL([yes])
166 GLIBCXX_ENABLE_CXX_FLAGS
167 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
168 GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes])
169 GLIBCXX_ENABLE_PYTHON
170 GLIBCXX_ENABLE_WERROR([yes])
172 # Checks for operating systems support that doesn't require linking.
173 GLIBCXX_CHECK_STDIO_PROTO
174 GLIBCXX_CHECK_SYSTEM_ERROR
176 # For the streamoff typedef.
177 GLIBCXX_CHECK_INT64_T
182 # For showmanyc_helper().
183 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
185 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
188 AC_CHECK_HEADERS(sys/uio.h)
191 # For C99 support to TR1.
192 GLIBCXX_CHECK_C99_TR1
194 # For the EOF, SEEK_CUR, and SEEK_END integer constants.
195 GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS
197 # For gettimeofday support.
198 GLIBCXX_CHECK_GETTIMEOFDAY
200 # For clock_gettime, nanosleep and sched_yield support.
201 # NB: The default is [no], because otherwise it requires linking.
202 GLIBCXX_ENABLE_LIBSTDCXX_TIME([no])
206 # For hardware_concurrency
207 AC_CHECK_HEADERS(sys/sysinfo.h)
208 GLIBCXX_CHECK_GET_NPROCS
209 AC_CHECK_HEADERS(unistd.h)
210 GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
211 GLIBCXX_CHECK_SC_NPROC_ONLN
212 GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
213 GLIBCXX_CHECK_SYSCTL_HW_NCPU
215 # Check for available headers.
216 AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
217 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
218 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
219 sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
222 # Only do link tests if native. Else, hardcode.
223 if $GLIBCXX_IS_NATIVE; then
225 # We can do more elaborate tests that assume a working linker.
228 GLIBCXX_CHECK_LINKER_FEATURES
229 GLIBCXX_CHECK_MATH_SUPPORT
230 GLIBCXX_CHECK_STDLIB_SUPPORT
232 # For /dev/random and /dev/urandom for TR1.
233 GLIBCXX_CHECK_RANDOM_TR1
243 # This lets us hard-code the functionality we know we'll have in the cross
244 # target environment. "Let" is a sugar-coated word placed on an especially
245 # dull and tedious hack, actually.
247 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
248 # that involve linking, can't be used:
249 # "cannot open sim-crt0.o"
250 # "cannot open crt0.o"
251 # etc. All this is because there currently exists no unified, consistent
252 # way for top level CC information to be passed down to target directories:
253 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
254 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
255 # crosses can be removed.
257 # If Canadian cross, then don't pick up tools from the build directory.
258 # Used only in GLIBCXX_EXPORT_INCLUDES.
259 if test -n "$with_cross_host" &&
260 test x"$build_alias" != x"$with_cross_host" &&
261 test x"$build" != x"$target";
268 # Construct crosses by hand, eliminating bits that need ld...
269 # GLIBCXX_CHECK_MATH_SUPPORT
271 # First, test for "known" system libraries. We may be using newlib even
272 # on a hosted environment.
273 if test "x${with_newlib}" = "xyes"; then
274 os_include_dir="os/newlib"
275 AC_DEFINE(HAVE_HYPOT)
277 # GLIBCXX_CHECK_STDLIB_SUPPORT
278 AC_DEFINE(HAVE_STRTOF)
280 AC_DEFINE(HAVE_ACOSF)
281 AC_DEFINE(HAVE_ASINF)
282 AC_DEFINE(HAVE_ATAN2F)
283 AC_DEFINE(HAVE_ATANF)
284 AC_DEFINE(HAVE_CEILF)
286 AC_DEFINE(HAVE_COSHF)
288 AC_DEFINE(HAVE_FABSF)
289 AC_DEFINE(HAVE_FLOORF)
290 AC_DEFINE(HAVE_FMODF)
291 AC_DEFINE(HAVE_FREXPF)
292 AC_DEFINE(HAVE_LDEXPF)
293 AC_DEFINE(HAVE_LOG10F)
295 AC_DEFINE(HAVE_MODFF)
298 AC_DEFINE(HAVE_SINHF)
299 AC_DEFINE(HAVE_SQRTF)
301 AC_DEFINE(HAVE_TANHF)
303 AC_DEFINE(HAVE_ICONV)
308 # At some point, we should differentiate between architectures
309 # like x86, which have long double versions, and alpha/powerpc/etc.,
310 # which don't. For the time being, punt.
311 if test x"long_double_math_on_this_cpu" = x"yes"; then
312 AC_DEFINE(HAVE_ACOSL)
313 AC_DEFINE(HAVE_ASINL)
314 AC_DEFINE(HAVE_ATAN2L)
315 AC_DEFINE(HAVE_ATANL)
316 AC_DEFINE(HAVE_CEILL)
318 AC_DEFINE(HAVE_COSHL)
320 AC_DEFINE(HAVE_FABSL)
321 AC_DEFINE(HAVE_FLOORL)
322 AC_DEFINE(HAVE_FMODL)
323 AC_DEFINE(HAVE_FREXPL)
324 AC_DEFINE(HAVE_LDEXPL)
325 AC_DEFINE(HAVE_LOG10L)
327 AC_DEFINE(HAVE_MODFL)
329 AC_DEFINE(HAVE_SINCOSL)
331 AC_DEFINE(HAVE_SINHL)
332 AC_DEFINE(HAVE_SQRTL)
334 AC_DEFINE(HAVE_TANHL)
338 # Check for _Unwind_GetIPInfo.
339 GCC_CHECK_UNWIND_GETIPINFO
341 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
343 GCC_HEADER_STDINT(include/gstdint.h)
345 GLIBCXX_ENABLE_SYMVERS([yes])
346 AC_SUBST(libtool_VERSION)
348 GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes])
352 powerpc*-*-linux* | \
357 #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
358 #error no need for long double compatibility
360 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
361 if test "$ac_ldbl_compat" = yes; then
362 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
363 [Define if compatibility should be provided for -mlong-double-64.])
364 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
367 GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
369 # Check if assembler supports disabling hardware capability support.
370 GLIBCXX_CHECK_ASSEMBLER_HWCAP
372 # Check if assembler supports rdrand opcode.
373 GLIBCXX_CHECK_X86_RDRAND
375 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
376 GLIBCXX_CONFIGURE_TESTSUITE
378 # For gthread support. Depends on GLIBCXX_ENABLE_SYMVERS.
379 GLIBCXX_CHECK_GTHREADS
381 # Define documentation rules conditionally.
383 # See if makeinfo has been installed and is modern enough
384 # that we can use it.
385 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
386 [GNU texinfo.* \([0-9][0-9.]*\)],
387 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
388 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
391 AC_CHECK_PROG([DOXYGEN], doxygen, yes, no)
392 AC_CHECK_PROG([DOT], dot, yes, no)
395 AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no)
396 AC_CHECK_PROG([XMLLINT], xmllint, yes, no)
397 GLIBCXX_CONFIGURE_DOCBOOK
399 # Check for xml/html dependencies.
400 AM_CONDITIONAL(BUILD_XML,
401 test $ac_cv_prog_DOXYGEN = "yes" &&
402 test $ac_cv_prog_DOT = "yes" &&
403 test $ac_cv_prog_XSLTPROC = "yes" &&
404 test $ac_cv_prog_XMLLINT = "yes" &&
405 test $glibcxx_stylesheets = "yes")
407 AM_CONDITIONAL(BUILD_HTML,
408 test $ac_cv_prog_DOXYGEN = "yes" &&
409 test $ac_cv_prog_DOT = "yes" &&
410 test $ac_cv_prog_XSLTPROC = "yes" &&
411 test $ac_cv_prog_XMLLINT = "yes" &&
412 test $glibcxx_stylesheets = "yes")
414 # Check for man dependencies.
415 AM_CONDITIONAL(BUILD_MAN,
416 test $ac_cv_prog_DOXYGEN = "yes" &&
417 test $ac_cv_prog_DOT = "yes")
419 # Check for pdf dependencies.
420 AC_CHECK_PROG([DBLATEX], dblatex, yes, no)
421 AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no)
422 AM_CONDITIONAL(BUILD_PDF,
423 test $ac_cv_prog_DBLATEX = "yes" &&
424 test $ac_cv_prog_PDFLATEX = "yes")
427 # Propagate the target-specific source directories through the build chain.
428 ATOMICITY_SRCDIR=config/${atomicity_dir}
429 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
430 ATOMIC_FLAGS=${atomic_flags}
431 CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
432 OS_INC_SRCDIR=config/${os_include_dir}
433 ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
434 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
435 CPU_OPT_EXT_RANDOM=config/${cpu_opt_ext_random}
436 AC_SUBST(ATOMICITY_SRCDIR)
437 AC_SUBST(ATOMIC_WORD_SRCDIR)
438 AC_SUBST(ATOMIC_FLAGS)
439 AC_SUBST(CPU_DEFINES_SRCDIR)
440 AC_SUBST(ABI_TWEAKS_SRCDIR)
441 AC_SUBST(OS_INC_SRCDIR)
442 AC_SUBST(ERROR_CONSTANTS_SRCDIR)
443 AC_SUBST(CPU_OPT_EXT_RANDOM)
446 # Determine cross-compile flags and AM_CONDITIONALs.
447 #AC_SUBST(GLIBCXX_IS_NATIVE)
448 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
449 GLIBCXX_EVALUATE_CONDITIONALS
453 if test ${multilib} = yes; then
454 multilib_arg="--enable-multilib"
459 # Export all the install information.
460 GLIBCXX_EXPORT_INSTALL_INFO
462 # Export all the include and flag information to Makefiles.
463 GLIBCXX_EXPORT_INCLUDES
466 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
467 dnl which can all be called multiple times as needed, plus one (different)
468 dnl AC_OUTPUT macro. This one lists the files to be created:
469 AC_CONFIG_FILES(Makefile)
470 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
471 AC_CONFIG_FILES([scripts/extract_symvers],[chmod +x scripts/extract_symvers])
472 AC_CONFIG_FILES([doc/xsl/customization.xsl])
474 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
475 # that multilib installs will end up installed in the correct place.
476 # The testsuite needs it for multilib-aware ABI baseline files.
477 # To work around this not being passed down from config-ml.in ->
478 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
479 # append it here. Only modify Makefiles that have just been created.
481 # Also, get rid of this simulated-VPATH thing that automake does.
482 AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
483 [cat > vpsed$$ << \_EOF
484 s!`test -f '$<' || echo '$(srcdir)/'`!!
486 sed -f vpsed$$ $ac_file > tmp$$
489 echo 'MULTISUBDIR =' >> $ac_file
491 . ${multi_basedir}/config-ml.in
492 AS_UNSET([ml_norecursion])
495 AC_CONFIG_COMMANDS([generate-headers],
496 [(cd include && ${MAKE-make} pch_build= )])
498 dnl And this actually makes things happen: