1 # Process this file with autoreconf to produce a configure script.
4 AC_INIT(package-unused, version-unused,, libstdc++)
5 AC_CONFIG_SRCDIR(src/ios.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 # For libtool versioning info, format is CURRENT:REVISION:AGE
15 libtool_VERSION=6:11:0
16 AC_SUBST(libtool_VERSION)
18 # Find the rest of the source tree framework.
19 AM_ENABLE_MULTILIB(, ..)
21 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
23 # You will slowly go insane if you do not grok the following fact: when
24 # building v3 as part of the compiler, the top-level /target/ becomes the
25 # library's /host/. configure then causes --target to default to --host,
26 # exactly like any other package using autoconf. Therefore, 'target' and
27 # 'host' will always be the same. This makes sense both for native and
28 # cross compilers, just think about it for a little while. :-)
30 # Also, if v3 is being configured as part of a cross compiler, the top-level
31 # configure script will pass the "real" host as $with_cross_host.
33 # Do not delete or change the following two lines. For why, see
34 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
36 target_alias=${target_alias-$host_alias}
38 # Handy for debugging:
39 #AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
41 if test "$build" != "$host"; then
42 # We are being configured with some form of cross compiler.
43 GLIBCXX_IS_NATIVE=false
44 case "$host","$target" in
45 # Darwin crosses can use the host system's libraries and headers,
46 # because of the fat library support. Of course, it must be the
47 # same version of Darwin on both sides. Allow the user to
48 # just say --target=foo-darwin without a version number to mean
49 # "the version on this system".
50 *-*-darwin*,*-*-darwin*)
51 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
52 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
53 if test $hostos = $targetos -o $targetos = darwin ; then
54 GLIBCXX_IS_NATIVE=true
63 GLIBCXX_IS_NATIVE=true
66 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
67 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
68 # 1.x: minimum required version
69 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
70 # of other PACKAGE_* variables will, however, and there's nothing
71 # we can do about that; they come from AC_INIT).
72 # foreign: we don't follow the normal rules for GNU packages (no COPYING
73 # file in the top srcdir, etc, etc), so stop complaining.
74 # no-dependencies: turns off auto dependency generation (just for now)
75 # -Wall: turns on all automake warnings...
76 # -Wno-portability: ...except this one, since GNU make is now required.
77 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies -Wall -Wno-portability -Wno-override])
78 AH_TEMPLATE(PACKAGE, [Name of package])
79 AH_TEMPLATE(VERSION, [Version number of package])
81 # Runs configure.host, finds CC, CXX, and assorted other critical bits. Sets
82 # up critical shell variables.
87 AC_SUBST(enable_shared)
88 AC_SUBST(enable_static)
90 # Possibly disable most of the library.
91 ## TODO: Consider skipping unncessary tests altogether in this case, rather
92 ## than just ignoring the results. Faster /and/ more correct, win win.
95 # Enable compiler support that doesn't require linking.
96 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
97 GLIBCXX_ENABLE_PCH($is_hosted)
99 # Enable all the variable C++ runtime options that doesn't require linking.
100 GLIBCXX_ENABLE_CSTDIO
101 GLIBCXX_ENABLE_CLOCALE
102 GLIBCXX_ENABLE_ALLOCATOR
103 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
104 GLIBCXX_ENABLE_LONG_LONG([yes])
105 GLIBCXX_ENABLE_WCHAR_T([yes])
106 GLIBCXX_ENABLE_C99([yes])
107 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
108 GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
109 GLIBCXX_ENABLE_DEBUG([no])
110 GLIBCXX_ENABLE_PARALLEL
111 GLIBCXX_ENABLE_CXX_FLAGS
112 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
114 # Checks for operating systems support that don't require linking.
115 GLIBCXX_CHECK_SYSTEM_ERROR
116 GLIBCXX_CHECK_STANDARD_LAYOUT
118 # No surprises, no surprises...
119 GLIBCXX_ENABLE_THREADS
120 GLIBCXX_ENABLE_ATOMIC_BUILTINS
121 if test $atomicity_dir = cpu/generic/atomicity_mutex ; then
122 AC_MSG_WARN([No native atomic operations are provided for this platform.])
123 if test $target_thread_file = single; then
124 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
125 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
127 AC_MSG_WARN([They will be faked using a mutex.])
128 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
132 GLIBCXX_CHECK_COMPILER_FEATURES
134 if $GLIBCXX_IS_NATIVE; then
136 # We can do more elaborate tests that assume a working linker.
139 # Check for available headers.
140 AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
141 machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h \
142 sys/types.h sys/ipc.h sys/sem.h])
144 GLIBCXX_CHECK_LINKER_FEATURES
145 GLIBCXX_CHECK_MATH_SUPPORT
146 GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
147 GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
148 GLIBCXX_CHECK_STDLIB_SUPPORT
150 # For showmanyc_helper().
151 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
153 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
156 AC_CHECK_HEADERS(sys/uio.h)
159 # For the __streamoff_base_type typedef.
160 GLIBCXX_CHECK_INT64_T
165 # For C99 support to TR1.
166 GLIBCXX_CHECK_C99_TR1
168 # For dev/random and dev/urandom for TR1.
169 GLIBCXX_CHECK_RANDOM_TR1
174 # For _Unwind_GetIPInfo.
175 GCC_CHECK_UNWIND_GETIPINFO
180 [#include <setjmp.h>],
182 while (! sigsetjmp (env, 1))
185 [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])])
194 # This lets us hard-code the functionality we know we'll have in the cross
195 # target environment. "Let" is a sugar-coated word placed on an especially
196 # dull and tedious hack, actually.
198 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
199 # that involve linking, can't be used:
200 # "cannot open sim-crt0.o"
201 # "cannot open crt0.o"
202 # etc. All this is because there currently exists no unified, consistent
203 # way for top level CC information to be passed down to target directories:
204 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
205 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
206 # crosses can be removed.
208 # If Canadian cross, then don't pick up tools from the build directory.
209 # Used only in GLIBCXX_EXPORT_INCLUDES.
210 if test -n "$with_cross_host" &&
211 test x"$build_alias" != x"$with_cross_host" &&
212 test x"$build" != x"$target";
219 # Construct crosses by hand, eliminating bits that need ld...
220 # GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
221 # GLIBCXX_CHECK_MATH_SUPPORT
223 # First, test for "known" system libraries. We may be using newlib even
224 # on a hosted environment.
225 if test "x${with_newlib}" = "xyes"; then
226 os_include_dir="os/newlib"
227 AC_DEFINE(HAVE_HYPOT)
229 # GLIBCXX_CHECK_STDLIB_SUPPORT
230 AC_DEFINE(HAVE_STRTOF)
234 AC_DEFINE(HAVE_ACOSF)
235 AC_DEFINE(HAVE_ASINF)
236 AC_DEFINE(HAVE_ATAN2F)
237 AC_DEFINE(HAVE_ATANF)
238 AC_DEFINE(HAVE_CEILF)
239 AC_DEFINE(HAVE_COPYSIGN)
240 AC_DEFINE(HAVE_COPYSIGNF)
242 AC_DEFINE(HAVE_COSHF)
244 AC_DEFINE(HAVE_FABSF)
245 AC_DEFINE(HAVE_FLOORF)
246 AC_DEFINE(HAVE_FMODF)
247 AC_DEFINE(HAVE_FREXPF)
248 AC_DEFINE(HAVE_LDEXPF)
249 AC_DEFINE(HAVE_LOG10F)
251 AC_DEFINE(HAVE_MODFF)
254 AC_DEFINE(HAVE_SINHF)
255 AC_DEFINE(HAVE_SQRTF)
257 AC_DEFINE(HAVE_TANHF)
259 AC_DEFINE(HAVE_S_ISREG)
260 AC_DEFINE(HAVE_S_IFREG)
262 AC_DEFINE(HAVE_ICONV)
267 # At some point, we should differentiate between architectures
268 # like x86, which have long double versions, and alpha/powerpc/etc.,
269 # which don't. For the time being, punt.
270 if test x"long_double_math_on_this_cpu" = x"yes"; then
271 AC_DEFINE(HAVE_ACOSL)
272 AC_DEFINE(HAVE_ASINL)
273 AC_DEFINE(HAVE_ATAN2L)
274 AC_DEFINE(HAVE_ATANL)
275 AC_DEFINE(HAVE_CEILL)
276 AC_DEFINE(HAVE_COPYSIGNL)
278 AC_DEFINE(HAVE_COSHL)
280 AC_DEFINE(HAVE_FABSL)
281 AC_DEFINE(HAVE_FLOORL)
282 AC_DEFINE(HAVE_FMODL)
283 AC_DEFINE(HAVE_FREXPL)
284 AC_DEFINE(HAVE_LDEXPL)
285 AC_DEFINE(HAVE_LOG10L)
287 AC_DEFINE(HAVE_MODFL)
289 AC_DEFINE(HAVE_SINCOSL)
291 AC_DEFINE(HAVE_SINHL)
292 AC_DEFINE(HAVE_SQRTL)
294 AC_DEFINE(HAVE_TANHL)
297 # Assume we have _Unwind_GetIPInfo for cross-compiles.
298 AC_DEFINE(HAVE_GETIPINFO)
301 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
303 GCC_HEADER_STDINT(include/gstdint.h)
305 # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
306 GLIBCXX_ENABLE_SYMVERS([yes])
307 GLIBCXX_ENABLE_VISIBILITY([yes])
311 powerpc*-*-linux* | \
317 #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
318 #error no need for long double compatibility
320 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
321 if test "$ac_ldbl_compat" = yes; then
322 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
323 [Define if compatibility should be provided for -mlong-double-64.])
324 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
327 GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
329 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
330 GLIBCXX_CONFIGURE_TESTSUITE
332 # Propagate the target-specific source directories through the build chain.
333 ATOMICITY_SRCDIR=config/${atomicity_dir}
334 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
335 ATOMIC_FLAGS=${atomic_flags}
336 CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
337 OS_INC_SRCDIR=config/${os_include_dir}
338 ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
339 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
340 AC_SUBST(ATOMICITY_SRCDIR)
341 AC_SUBST(ATOMIC_WORD_SRCDIR)
342 AC_SUBST(ATOMIC_FLAGS)
343 AC_SUBST(CPU_DEFINES_SRCDIR)
344 AC_SUBST(ABI_TWEAKS_SRCDIR)
345 AC_SUBST(OS_INC_SRCDIR)
346 AC_SUBST(ERROR_CONSTANTS_SRCDIR)
349 # Determine cross-compile flags and AM_CONDITIONALs.
350 #AC_SUBST(GLIBCXX_IS_NATIVE)
351 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
352 # from GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT:
353 #AM_CONDITIONAL(GLIBCXX_BUILD_LIBMATH, test $need_libmath = yes)
354 GLIBCXX_EVALUATE_CONDITIONALS
358 if test ${multilib} = yes; then
359 multilib_arg="--enable-multilib"
364 # Export all the install information.
365 GLIBCXX_EXPORT_INSTALL_INFO
367 # Export all the include and flag information to Makefiles.
368 GLIBCXX_EXPORT_INCLUDES
371 if test "$enable_shared" = yes; then
372 LIBSUPCXX_PICFLAGS="-prefer-pic"
376 AC_SUBST(LIBSUPCXX_PICFLAGS)
378 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
379 dnl which can all be called multiple times as needed, plus one (different)
380 dnl AC_OUTPUT macro. This one lists the files to be created:
383 AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ])
385 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
387 dnl These commands are run at the end of config.status:
388 AC_CONFIG_COMMANDS([default],
389 [if test -n "$CONFIG_FILES"; then
390 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
391 # that multilib installs will end up installed in the correct place.
392 # The testsuite needs it for multilib-aware ABI baseline files.
393 # To work around this not being passed down from config-ml.in ->
394 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
395 # append it here. Only modify Makefiles that have just been created.
397 # Also, get rid of this simulated-VPATH thing that automake does.
399 s!`test -f '$<' || echo '$(srcdir)/'`!!
401 for i in $SUBDIRS; do
402 case $CONFIG_FILES in
404 #echo "Adding MULTISUBDIR to $i/Makefile"
405 sed -f vpsed $i/Makefile > tmp
406 grep '^MULTISUBDIR =' Makefile >> tmp
413 (cd include && ${MAKE-make})
416 # Variables needed in config.status (file generation) which aren't already
417 # passed by autoconf.
421 dnl And this actually makes things happen: