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
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" != "$host"; then
42 # We are being configured with some form of cross compiler.
43 GLIBCXX_IS_NATIVE=false
46 GLIBCXX_IS_NATIVE=true
49 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
50 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
51 # 1.x: minimum required version
52 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
53 # of other PACKAGE_* variables will, however, and there's nothing
54 # we can do about that; they come from AC_INIT).
55 # foreign: we don't follow the normal rules for GNU packages (no COPYING
56 # file in the top srcdir, etc, etc), so stop complaining.
57 # no-dependencies: turns off auto dependency generation (just for now)
58 # -Wall: turns on all automake warnings...
59 # -Wno-portability: ...except this one, since GNU make is now required.
60 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies -Wall -Wno-portability -Wno-override])
61 AH_TEMPLATE(PACKAGE, [Name of package])
62 AH_TEMPLATE(VERSION, [Version number of package])
64 # Runs configure.host, finds CC, CXX, and assorted other critical bits. Sets
65 # up critical shell variables.
70 AC_SUBST(enable_shared)
71 AC_SUBST(enable_static)
73 # Possibly disable most of the library.
74 ## TODO: Consider skipping unncessary tests altogether in this case, rather
75 ## than just ignoring the results. Faster /and/ more correct, win win.
78 # Check for compiler support that doesn't require linking.
79 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
80 GLIBCXX_ENABLE_PCH($is_hosted)
82 # Enable all the variable C++ runtime options.
84 GLIBCXX_ENABLE_CLOCALE
85 GLIBCXX_ENABLE_ALLOCATOR
86 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
87 GLIBCXX_ENABLE_C99([yes])
88 GLIBCXX_ENABLE_LONG_LONG([yes])
89 GLIBCXX_ENABLE_WCHAR_T([yes])
90 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
91 GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
92 GLIBCXX_ENABLE_DEBUG([no])
93 GLIBCXX_ENABLE_CXX_FLAGS
94 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
96 # No surprises, no surprises...
97 GLIBCXX_ENABLE_THREADS
98 if test $atomicity_dir = cpu/generic ; then
99 AC_MSG_WARN([No native atomic operations are provided for this platform.])
100 if test $target_thread_file = single; then
101 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
102 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
104 AC_MSG_WARN([They will be faked using a mutex.])
105 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
110 if $GLIBCXX_IS_NATIVE; then
112 # We can do more elaborate tests that assume a working linker.
115 # Check for available headers.
116 AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
117 machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h \
118 sys/types.h sys/ipc.h sys/sem.h])
120 GLIBCXX_CHECK_COMPILER_FEATURES
121 GLIBCXX_CHECK_LINKER_FEATURES
122 GLIBCXX_CHECK_MATH_SUPPORT
123 GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
124 GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
125 GLIBCXX_CHECK_ICONV_SUPPORT
126 GLIBCXX_CHECK_STDLIB_SUPPORT
128 # For showmanyc_helper().
129 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
131 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
134 AC_CHECK_HEADERS(sys/uio.h)
137 # For the __streamoff_base_type typedef.
138 GLIBCXX_CHECK_INT64_T
146 [#include <setjmp.h>],
148 while (! sigsetjmp (env, 1))
151 [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])])
157 # This lets us hard-code the functionality we know we'll have in the cross
158 # target environment. "Let" is a sugar-coated word placed on an especially
159 # dull and tedious hack, actually.
161 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
162 # that involve linking, can't be used:
163 # "cannot open sim-crt0.o"
164 # "cannot open crt0.o"
165 # etc. All this is because there currently exists no unified, consistent
166 # way for top level CC information to be passed down to target directories:
167 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
168 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
169 # crosses can be removed.
171 # If Canadian cross, then don't pick up tools from the build directory.
172 # Used only in GLIBCXX_EXPORT_INCLUDES.
173 if test -n "$with_cross_host" &&
174 test x"$build_alias" != x"$with_cross_host" &&
175 test x"$build" != x"$target";
182 # Construct crosses by hand, eliminating bits that need ld...
183 # GLIBCXX_CHECK_COMPILER_FEATURES
184 # GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
185 # GLIBCXX_CHECK_MATH_SUPPORT
187 # First, test for "known" system libraries. We may be using newlib even
188 # on a hosted environment.
189 if test "x${with_newlib}" = "xyes"; then
190 os_include_dir="os/newlib"
191 AC_DEFINE(HAVE_HYPOT)
193 # GLIBCXX_CHECK_STDLIB_SUPPORT
194 AC_DEFINE(HAVE_STRTOF)
198 AC_DEFINE(HAVE_ACOSF)
199 AC_DEFINE(HAVE_ASINF)
200 AC_DEFINE(HAVE_ATAN2F)
201 AC_DEFINE(HAVE_ATANF)
202 AC_DEFINE(HAVE_CEILF)
203 AC_DEFINE(HAVE_COPYSIGN)
204 AC_DEFINE(HAVE_COPYSIGNF)
206 AC_DEFINE(HAVE_COSHF)
208 AC_DEFINE(HAVE_FABSF)
209 AC_DEFINE(HAVE_FLOORF)
210 AC_DEFINE(HAVE_FMODF)
211 AC_DEFINE(HAVE_FREXPF)
212 AC_DEFINE(HAVE_LDEXPF)
213 AC_DEFINE(HAVE_LOG10F)
215 AC_DEFINE(HAVE_MODFF)
218 AC_DEFINE(HAVE_SINHF)
219 AC_DEFINE(HAVE_SQRTF)
221 AC_DEFINE(HAVE_TANHF)
223 AC_DEFINE(HAVE_S_ISREG)
224 AC_DEFINE(HAVE_S_IFREG)
229 # At some point, we should differentiate between architectures
230 # like x86, which have long double versions, and alpha/powerpc/etc.,
231 # which don't. For the time being, punt.
232 if test x"long_double_math_on_this_cpu" = x"yes"; then
233 AC_DEFINE(HAVE_ACOSL)
234 AC_DEFINE(HAVE_ASINL)
235 AC_DEFINE(HAVE_ATAN2L)
236 AC_DEFINE(HAVE_ATANL)
237 AC_DEFINE(HAVE_CEILL)
238 AC_DEFINE(HAVE_COPYSIGNL)
240 AC_DEFINE(HAVE_COSHL)
242 AC_DEFINE(HAVE_FABSL)
243 AC_DEFINE(HAVE_FLOORL)
244 AC_DEFINE(HAVE_FMODL)
245 AC_DEFINE(HAVE_FREXPL)
246 AC_DEFINE(HAVE_LDEXPL)
247 AC_DEFINE(HAVE_LOG10L)
249 AC_DEFINE(HAVE_MODFL)
251 AC_DEFINE(HAVE_SINCOSL)
253 AC_DEFINE(HAVE_SINHL)
254 AC_DEFINE(HAVE_SQRTL)
256 AC_DEFINE(HAVE_TANHL)
261 # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
262 GLIBCXX_ENABLE_SYMVERS([yes])
264 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
265 GLIBCXX_CONFIGURE_TESTSUITE
267 # Propagate the target-specific source directories through the build chain.
268 ATOMICITY_SRCDIR=config/${atomicity_dir}
269 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
270 OS_INC_SRCDIR=config/${os_include_dir}
271 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
272 AC_SUBST(ATOMICITY_SRCDIR)
273 AC_SUBST(ATOMIC_WORD_SRCDIR)
274 AC_SUBST(ABI_TWEAKS_SRCDIR)
275 AC_SUBST(OS_INC_SRCDIR)
277 # Determine cross-compile flags and AM_CONDITIONALs.
278 #AC_SUBST(GLIBCXX_IS_NATIVE)
279 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
280 # from GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT:
281 #AM_CONDITIONAL(GLIBCXX_BUILD_LIBMATH, test $need_libmath = yes)
282 GLIBCXX_EVALUATE_CONDITIONALS
286 if test ${multilib} = yes; then
287 multilib_arg="--enable-multilib"
292 # Export all the install information.
293 GLIBCXX_EXPORT_INSTALL_INFO
295 # Export all the include and flag information to Makefiles.
296 GLIBCXX_EXPORT_INCLUDES
299 if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features |
300 grep "enable shared" > /dev/null;
302 LIBSUPCXX_PICFLAGS=-prefer-pic
306 AC_SUBST(LIBSUPCXX_PICFLAGS)
308 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
309 dnl which can all be called multiple times as needed, plus one (different)
310 dnl AC_OUTPUT macro. This one lists the files to be created:
313 AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ])
315 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
317 dnl These commands are run at the end of config.status:
318 AC_CONFIG_COMMANDS([default],
319 [if test -n "$CONFIG_FILES"; then
320 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
321 # that multilib installs will end up installed in the correct place.
322 # The testsuite needs it for multilib-aware ABI baseline files.
323 # To work around this not being passed down from config-ml.in ->
324 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
325 # append it here. Only modify Makefiles that have just been created.
327 # Also, get rid of this simulated-VPATH thing that automake does.
329 s!`test -f '$<' || echo '$(srcdir)/'`!!
331 for i in $SUBDIRS; do
332 case $CONFIG_FILES in
334 #echo "Adding MULTISUBDIR to $i/Makefile"
335 sed -f vpsed $i/Makefile > tmp
336 grep '^MULTISUBDIR =' Makefile >> tmp
343 (cd include && ${MAKE-make})
346 # Variables needed in config.status (file generation) which aren't already
347 # passed by autoconf.
351 dnl And this actually makes things happen: