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 GLIBCXX_TOPREL_CONFIGURE
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" != "$host"; then
43 # We are being configured with some form of cross compiler.
44 GLIBCXX_IS_NATIVE=false
47 GLIBCXX_IS_NATIVE=true
50 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
51 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
52 # 1.x: minimum required version
53 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
54 # of other PACKAGE_* variables will, however, and there's nothing
55 # we can do about that; they come from AC_INIT).
56 # foreign: we don't follow the normal rules for GNU packages (no COPYING
57 # file in the top srcdir, etc, etc), so stop complaining.
58 # no-dependencies: turns off auto dependency generation (just for now)
59 # -Wall: turns on all automake warnings
60 AM_INIT_AUTOMAKE([1.7.6 no-define foreign no-dependencies -Wall])
62 # Runs configure.host, finds CC, CXX, and assorted other critical bits. Sets
63 # up critical shell variables.
66 #AC_MSG_NOTICE([====== Starting libtool configuration])
69 AC_SUBST(enable_shared)
70 AC_SUBST(enable_static)
71 #AC_MSG_NOTICE([====== Finished libtool configuration]) ; sleep 10
73 # Possibly disable most of the library.
74 ## XXX Consider skipping unncessary tests altogether in this case, rather
75 ## than just ignoring the results. Faster /and/ more correct, win win.
78 # Check for support bits and g++ features that don't require linking.
79 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
80 GLIBCXX_ENABLE_PCH($is_hosted)
82 # Enable all the variable C++ runtime options.
83 # NB: C_MBCHAR must come early.
85 GLIBCXX_ENABLE_CLOCALE
86 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
87 GLIBCXX_ENABLE_C_MBCHAR([yes])
88 GLIBCXX_ENABLE_C99([yes])
89 GLIBCXX_ENABLE_LONG_LONG([yes])
90 GLIBCXX_ENABLE_THREADS
91 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
92 GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
93 GLIBCXX_ENABLE_DEBUG([no])
94 GLIBCXX_ENABLE_CXX_FLAGS
96 # No surprises, no surprises...
97 if test $atomicity_include_dir = cpu/generic ; then
98 AC_MSG_WARN([No native atomic operations are provided for this platform.])
99 if test $target_thread_file = single; then
100 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
101 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
103 AC_MSG_WARN([They will be faked using a mutex.])
104 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
109 if $GLIBCXX_IS_NATIVE; then
111 # We can do more elaborate tests that assume a working linker.
114 # Check for available headers.
115 AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
116 machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h \
119 GLIBCXX_CHECK_COMPILER_FEATURES
120 GLIBCXX_CHECK_LINKER_FEATURES
121 GLIBCXX_CHECK_MATH_SUPPORT
122 GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
123 GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
124 GLIBCXX_CHECK_WCHAR_T_SUPPORT
125 GLIBCXX_CHECK_STDLIB_SUPPORT
127 # For showmanyc_helper().
128 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
130 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
133 AC_CHECK_HEADERS(sys/uio.h)
136 # For the __streamoff_base_type typedef.
137 GLIBCXX_CHECK_INT64_T
145 [#include <setjmp.h>],
147 while (! sigsetjmp (env, 1))
150 [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])])
156 # This lets us hard-code the functionality we know we'll have in the cross
157 # target environment. "Let" is a sugar-coated word placed on an especially
158 # dull and tedious hack, actually.
160 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
161 # that involve linking, can't be used:
162 # "cannot open sim-crt0.o"
163 # "cannot open crt0.o"
164 # etc. All this is because there currently exists no unified, consistent
165 # way for top level CC information to be passed down to target directories:
166 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
167 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
168 # crosses can be removed.
170 # If Canadian cross, then don't pick up tools from the build directory.
171 # Used only in GLIBCXX_EXPORT_INCLUDES.
172 if test -n "$with_cross_host" &&
173 test x"$build_alias" != x"$with_cross_host" &&
174 test x"$build" != x"$target";
181 # Construct crosses by hand, eliminating bits that need ld...
182 # GLIBCXX_CHECK_COMPILER_FEATURES
183 # GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
184 # GLIBCXX_CHECK_MATH_SUPPORT
186 # First, test for "known" system libraries. We may be using newlib even
187 # on a hosted environment.
188 if test "x${with_newlib}" = "xyes"; then
189 os_include_dir="os/newlib"
190 AC_DEFINE(HAVE_HYPOT)
192 # GLIBCXX_CHECK_STDLIB_SUPPORT
193 AC_DEFINE(HAVE_STRTOF)
194 AC_DEFINE(HAVE_STRTOLD)
198 AC_DEFINE(HAVE_ACOSF)
199 AC_DEFINE(HAVE_ASINF)
200 AC_DEFINE(HAVE_ATAN2F)
201 AC_DEFINE(HAVE_ATANF)
202 AC_DEFINE(HAVE_CEILF)
203 AC_DEFINE(HAVE_COPYSIGN)
204 AC_DEFINE(HAVE_COPYSIGNF)
206 AC_DEFINE(HAVE_COSHF)
208 AC_DEFINE(HAVE_FABSF)
209 AC_DEFINE(HAVE_FLOORF)
210 AC_DEFINE(HAVE_FMODF)
211 AC_DEFINE(HAVE_FREXPF)
212 AC_DEFINE(HAVE_LDEXPF)
213 AC_DEFINE(HAVE_LOG10F)
215 AC_DEFINE(HAVE_MODFF)
218 AC_DEFINE(HAVE_SINHF)
219 AC_DEFINE(HAVE_SQRTF)
221 AC_DEFINE(HAVE_TANHF)
223 m4_include([crossconfig.m4])
226 # At some point, we should differentiate between architectures
227 # like x86, which have long double versions, and alpha/powerpc/etc.,
228 # which don't. For the time being, punt.
229 if test x"long_double_math_on_this_cpu" = x"yes"; then
230 AC_DEFINE(HAVE_ACOSL)
231 AC_DEFINE(HAVE_ASINL)
232 AC_DEFINE(HAVE_ATAN2L)
233 AC_DEFINE(HAVE_ATANL)
234 AC_DEFINE(HAVE_CEILL)
235 AC_DEFINE(HAVE_COPYSIGNL)
237 AC_DEFINE(HAVE_COSHL)
239 AC_DEFINE(HAVE_FABSL)
240 AC_DEFINE(HAVE_FLOORL)
241 AC_DEFINE(HAVE_FMODL)
242 AC_DEFINE(HAVE_FREXPL)
243 AC_DEFINE(HAVE_LDEXPL)
244 AC_DEFINE(HAVE_LOG10L)
246 AC_DEFINE(HAVE_MODFL)
248 AC_DEFINE(HAVE_SINCOSL)
250 AC_DEFINE(HAVE_SINHL)
251 AC_DEFINE(HAVE_SQRTL)
253 AC_DEFINE(HAVE_TANHL)
258 # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
259 GLIBCXX_ENABLE_SYMVERS([yes])
261 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
262 GLIBCXX_CONFIGURE_TESTSUITE
264 # Propagate the target-specific source directories through the build chain.
265 # (Nothing currently uses cpu_include_dir directly; only atomicity_include_dir
266 # uses it, and it only gets used in this file.)
267 ATOMICITY_INC_SRCDIR=config/${atomicity_include_dir}
268 OS_INC_SRCDIR=config/${os_include_dir}
269 AC_SUBST(ATOMICITY_INC_SRCDIR)
270 AC_SUBST(OS_INC_SRCDIR)
272 # Determine cross-compile flags and AM_CONDITIONALs.
273 #AC_SUBST(GLIBCXX_IS_NATIVE)
274 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
275 # from GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT:
276 #AM_CONDITIONAL(GLIBCXX_BUILD_LIBMATH, test $need_libmath = yes)
277 GLIBCXX_EVALUATE_CONDITIONALS
281 if test ${multilib} = yes; then
282 multilib_arg="--enable-multilib"
287 # Export all the install information.
288 GLIBCXX_EXPORT_INSTALL_INFO
290 # Export all the include and flag information to Makefiles.
291 GLIBCXX_EXPORT_INCLUDES
294 if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features |
295 grep "enable shared" > /dev/null;
297 LIBSUPCXX_PICFLAGS=-prefer-pic
301 AC_SUBST(LIBSUPCXX_PICFLAGS)
303 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
304 dnl which can all be called multiple times as needed, plus one (different)
305 dnl AC_OUTPUT macro. This one lists the files to be created:
308 AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ])
310 AC_CONFIG_FILES([scripts/check_survey],[chmod +x scripts/check_survey])
311 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
313 dnl These commands are run at the end of config.status:
314 AC_CONFIG_COMMANDS([default],
315 [if test -n "$CONFIG_FILES"; then
316 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
317 # that multilib installs will end up installed in the correct place.
318 # The testsuite needs it for multilib-aware ABI baseline files.
319 # To work around this not being passed down from config-ml.in ->
320 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
321 # append it here. Only modify Makefiles that have just been created.
323 # Also, get rid of this simulated-VPATH thing that automake does.
325 s!`test -f '$<' || echo '$(srcdir)/'`!!
327 for i in $SUBDIRS; do
328 case $CONFIG_FILES in
330 #echo "Adding MULTISUBDIR to $i/Makefile"
331 sed -f vpsed $i/Makefile > tmp
332 grep '^MULTISUBDIR =' Makefile >> tmp
339 (cd include && ${MAKE-make})
342 # Variables needed in config.status (file generation) which aren't already
343 # passed by autoconf.
347 dnl And this actually makes things happen: