1 # Process this file with autoconf to produce a configure script, like so:
2 # aclocal && autoconf && autoheader && automake
5 AC_INIT(package-unused, version-unused,, libstdc++)
6 AC_CONFIG_SRCDIR(src/ios.cc)
7 AC_CONFIG_HEADER(config.h)
9 # This works around the fact that libtool configuration may change LD
10 # for this particular configuration, but some shells, instead of
11 # keeping the changes in LD private, export them just because LD is
12 # exported. Only used at the end of this file.
13 ### am handles this now? ORIGINAL_LD_FOR_MULTILIBS=$LD
15 # For libtool versioning info, format is CURRENT:REVISION:AGE
17 AC_SUBST(libtool_VERSION)
19 # Find the rest of the source tree framework.
20 AM_ENABLE_MULTILIB(, ..)
22 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
24 # You will slowly go insane if you do not grok the following fact: when
25 # building v3 as part of the compiler, the top-level /target/ becomes the
26 # library's /host/. configure then causes --target to default to --host,
27 # exactly like any other package using autoconf. Therefore, 'target' and
28 # 'host' will always be the same. This makes sense both for native and
29 # cross compilers, just think about it for a little while. :-)
31 # Also, if v3 is being configured as part of a cross compiler, the top-level
32 # configure script will pass the "real" host as $with_cross_host.
34 # Do not delete or change the following two lines. For why, see
35 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
37 target_alias=${target_alias-$host_alias}
39 # Handy for debugging:
40 #AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
42 if test "$build" != "$host"; then
43 # We are being configured with some form of cross compiler.
44 GLIBCXX_IS_NATIVE=false
47 GLIBCXX_IS_NATIVE=true
50 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
51 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
52 # 1.x: minimum required version
53 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
54 # of other PACKAGE_* variables will, however, and there's nothing
55 # we can do about that; they come from AC_INIT).
56 # foreign: we don't follow the normal rules for GNU packages (no COPYING
57 # file in the top srcdir, etc, etc), so stop complaining.
58 # no-dependencies: turns off auto dependency generation (just for now)
59 # -Wall: turns on all automake warnings...
60 # -Wno-portability: ...except this one, since GNU make is now required.
61 AM_INIT_AUTOMAKE([1.7.6 no-define foreign no-dependencies -Wall -Wno-portability -Wno-override])
63 # Runs configure.host, finds CC, CXX, and assorted other critical bits. Sets
64 # up critical shell variables.
67 #AC_MSG_NOTICE([====== Starting libtool configuration])
70 AC_SUBST(enable_shared)
71 AC_SUBST(enable_static)
72 #AC_MSG_NOTICE([====== Finished libtool configuration]) ; sleep 10
74 # Possibly disable most of the library.
75 ## XXX Consider skipping unncessary tests altogether in this case, rather
76 ## than just ignoring the results. Faster /and/ more correct, win win.
79 # Check for support bits and g++ features that don't require linking.
80 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
81 GLIBCXX_ENABLE_PCH($is_hosted)
83 # Enable all the variable C++ runtime options.
84 # NB: C_MBCHAR must come early.
86 GLIBCXX_ENABLE_CLOCALE
87 GLIBCXX_ENABLE_ALLOCATOR
88 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
89 GLIBCXX_ENABLE_C_MBCHAR([yes])
90 GLIBCXX_ENABLE_C99([yes])
91 GLIBCXX_ENABLE_LONG_LONG([yes])
92 GLIBCXX_ENABLE_THREADS
93 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
94 GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
95 GLIBCXX_ENABLE_DEBUG([no])
96 GLIBCXX_ENABLE_CXX_FLAGS
98 # No surprises, no surprises...
99 if test $atomicity_dir = cpu/generic ; then
100 AC_MSG_WARN([No native atomic operations are provided for this platform.])
101 if test $target_thread_file = single; then
102 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
103 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
105 AC_MSG_WARN([They will be faked using a mutex.])
106 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
111 if $GLIBCXX_IS_NATIVE; then
113 # We can do more elaborate tests that assume a working linker.
116 # Check for available headers.
117 AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
118 machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h \
121 GLIBCXX_CHECK_COMPILER_FEATURES
122 GLIBCXX_CHECK_LINKER_FEATURES
123 GLIBCXX_CHECK_MATH_SUPPORT
124 GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
125 GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
126 GLIBCXX_CHECK_WCHAR_T_SUPPORT
127 GLIBCXX_CHECK_STDLIB_SUPPORT
129 # For showmanyc_helper().
130 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
132 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
135 AC_CHECK_HEADERS(sys/uio.h)
138 # For the __streamoff_base_type typedef.
139 GLIBCXX_CHECK_INT64_T
147 [#include <setjmp.h>],
149 while (! sigsetjmp (env, 1))
152 [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])])
158 # This lets us hard-code the functionality we know we'll have in the cross
159 # target environment. "Let" is a sugar-coated word placed on an especially
160 # dull and tedious hack, actually.
162 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
163 # that involve linking, can't be used:
164 # "cannot open sim-crt0.o"
165 # "cannot open crt0.o"
166 # etc. All this is because there currently exists no unified, consistent
167 # way for top level CC information to be passed down to target directories:
168 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
169 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
170 # crosses can be removed.
172 # If Canadian cross, then don't pick up tools from the build directory.
173 # Used only in GLIBCXX_EXPORT_INCLUDES.
174 if test -n "$with_cross_host" &&
175 test x"$build_alias" != x"$with_cross_host" &&
176 test x"$build" != x"$target";
183 # Construct crosses by hand, eliminating bits that need ld...
184 # GLIBCXX_CHECK_COMPILER_FEATURES
185 # GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
186 # GLIBCXX_CHECK_MATH_SUPPORT
188 # First, test for "known" system libraries. We may be using newlib even
189 # on a hosted environment.
190 if test "x${with_newlib}" = "xyes"; then
191 os_include_dir="os/newlib"
192 AC_DEFINE(HAVE_HYPOT)
194 # GLIBCXX_CHECK_STDLIB_SUPPORT
195 AC_DEFINE(HAVE_STRTOF)
196 AC_DEFINE(HAVE_STRTOLD)
200 AC_DEFINE(HAVE_ACOSF)
201 AC_DEFINE(HAVE_ASINF)
202 AC_DEFINE(HAVE_ATAN2F)
203 AC_DEFINE(HAVE_ATANF)
204 AC_DEFINE(HAVE_CEILF)
205 AC_DEFINE(HAVE_COPYSIGN)
206 AC_DEFINE(HAVE_COPYSIGNF)
208 AC_DEFINE(HAVE_COSHF)
210 AC_DEFINE(HAVE_FABSF)
211 AC_DEFINE(HAVE_FLOORF)
212 AC_DEFINE(HAVE_FMODF)
213 AC_DEFINE(HAVE_FREXPF)
214 AC_DEFINE(HAVE_LDEXPF)
215 AC_DEFINE(HAVE_LOG10F)
217 AC_DEFINE(HAVE_MODFF)
220 AC_DEFINE(HAVE_SINHF)
221 AC_DEFINE(HAVE_SQRTF)
223 AC_DEFINE(HAVE_TANHF)
225 AC_DEFINE(HAVE_S_ISREG)
226 AC_DEFINE(HAVE_S_IFREG)
228 m4_include([crossconfig.m4])
231 # At some point, we should differentiate between architectures
232 # like x86, which have long double versions, and alpha/powerpc/etc.,
233 # which don't. For the time being, punt.
234 if test x"long_double_math_on_this_cpu" = x"yes"; then
235 AC_DEFINE(HAVE_ACOSL)
236 AC_DEFINE(HAVE_ASINL)
237 AC_DEFINE(HAVE_ATAN2L)
238 AC_DEFINE(HAVE_ATANL)
239 AC_DEFINE(HAVE_CEILL)
240 AC_DEFINE(HAVE_COPYSIGNL)
242 AC_DEFINE(HAVE_COSHL)
244 AC_DEFINE(HAVE_FABSL)
245 AC_DEFINE(HAVE_FLOORL)
246 AC_DEFINE(HAVE_FMODL)
247 AC_DEFINE(HAVE_FREXPL)
248 AC_DEFINE(HAVE_LDEXPL)
249 AC_DEFINE(HAVE_LOG10L)
251 AC_DEFINE(HAVE_MODFL)
253 AC_DEFINE(HAVE_SINCOSL)
255 AC_DEFINE(HAVE_SINHL)
256 AC_DEFINE(HAVE_SQRTL)
258 AC_DEFINE(HAVE_TANHL)
263 # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
264 GLIBCXX_ENABLE_SYMVERS([yes])
266 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
267 GLIBCXX_CONFIGURE_TESTSUITE
269 # Propagate the target-specific source directories through the build chain.
270 ATOMICITY_SRCDIR=config/${atomicity_dir}
271 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
272 OS_INC_SRCDIR=config/${os_include_dir}
273 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
274 AC_SUBST(ATOMICITY_SRCDIR)
275 AC_SUBST(ATOMIC_WORD_SRCDIR)
276 AC_SUBST(ABI_TWEAKS_SRCDIR)
277 AC_SUBST(OS_INC_SRCDIR)
279 # Determine cross-compile flags and AM_CONDITIONALs.
280 #AC_SUBST(GLIBCXX_IS_NATIVE)
281 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
282 # from GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT:
283 #AM_CONDITIONAL(GLIBCXX_BUILD_LIBMATH, test $need_libmath = yes)
284 GLIBCXX_EVALUATE_CONDITIONALS
288 if test ${multilib} = yes; then
289 multilib_arg="--enable-multilib"
294 # Export all the install information.
295 GLIBCXX_EXPORT_INSTALL_INFO
297 # Export all the include and flag information to Makefiles.
298 GLIBCXX_EXPORT_INCLUDES
301 if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features |
302 grep "enable shared" > /dev/null;
304 LIBSUPCXX_PICFLAGS=-prefer-pic
308 AC_SUBST(LIBSUPCXX_PICFLAGS)
310 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
311 dnl which can all be called multiple times as needed, plus one (different)
312 dnl AC_OUTPUT macro. This one lists the files to be created:
315 AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ])
317 AC_CONFIG_FILES([scripts/check_survey],[chmod +x scripts/check_survey])
318 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
320 dnl These commands are run at the end of config.status:
321 AC_CONFIG_COMMANDS([default],
322 [if test -n "$CONFIG_FILES"; then
323 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
324 # that multilib installs will end up installed in the correct place.
325 # The testsuite needs it for multilib-aware ABI baseline files.
326 # To work around this not being passed down from config-ml.in ->
327 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
328 # append it here. Only modify Makefiles that have just been created.
330 # Also, get rid of this simulated-VPATH thing that automake does.
332 s!`test -f '$<' || echo '$(srcdir)/'`!!
334 for i in $SUBDIRS; do
335 case $CONFIG_FILES in
337 #echo "Adding MULTISUBDIR to $i/Makefile"
338 sed -f vpsed $i/Makefile > tmp
339 grep '^MULTISUBDIR =' Makefile >> tmp
346 (cd include && ${MAKE-make})
349 # Variables needed in config.status (file generation) which aren't already
350 # passed by autoconf.
354 dnl And this actually makes things happen: