1 # Process this file with autoconf to produce a configure script, like so:
2 # aclocal && autoconf && autoheader && automake
5 AC_INIT(libstdc++, version-unused)
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 / $target_alias); sleep 5
42 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
43 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
44 # 1.x: minimum required version
45 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
46 # of other PACKAGE_* variables will, however, and there's nothing
47 # we can do about that)
48 # foreign: we don't follow the normal rules for GNU packages (no COPYING
49 # file in the top srcdir, etc, etc), so stop complaining.
50 # no-dependencies: turns off auto dependency generation (just for now)
51 # -Wall: turns on all automake warnings
52 AM_INIT_AUTOMAKE([1.7.6 no-define foreign no-dependencies -Wall])
54 # AM_INIT_AUTOMAKE sets this to the "smashed" format. Calling the library
55 # "libstdc--" causes remarkable amounts of breakage. Thanks, automake.
58 # Runs configure.host, finds CC, CXX, and assorted other critical bits. Sets
59 # up critical shell variables.
62 #AC_MSG_NOTICE([====== Starting libtool configuration])
65 AC_SUBST(enable_shared)
66 AC_SUBST(enable_static)
67 #AC_MSG_NOTICE([====== Finished libtool configuration]) ; sleep 10
69 # Check for support bits and g++ features that don't require linking.
70 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
71 GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS
72 GLIBCXX_ENABLE_PCH([yes])
74 # Enable all the variable C++ runtime options.
75 # NB: C_MBCHAR must come early.
77 GLIBCXX_ENABLE_CLOCALE
78 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
79 GLIBCXX_ENABLE_C_MBCHAR([yes])
80 GLIBCXX_ENABLE_C99([yes])
81 GLIBCXX_ENABLE_LONG_LONG([yes])
82 GLIBCXX_ENABLE_THREADS
83 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
84 GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
85 GLIBCXX_ENABLE_DEBUG([no])
86 GLIBCXX_ENABLE_CXX_FLAGS
88 # No surprises, no surprises...
89 if test $atomicity_include_dir = cpu/generic ; then
90 AC_MSG_WARN([No native atomic operations are provided for this platform.])
91 if test $target_thread_file = single; then
92 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
93 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
95 AC_MSG_WARN([They will be faked using a mutex.])
96 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
101 if test "$build" != "$host"; then
103 # We are being configured with some form of cross compiler.
104 GLIBCXX_IS_NATIVE=false
106 # This lets us hard-code the functionality we know we'll have in the cross
107 # target environment. "Let" is a sugar-coated word placed on an especially
108 # dull and tedious hack, actually.
110 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
111 # that involve linking, can't be used:
112 # "cannot open sim-crt0.o"
113 # "cannot open crt0.o"
114 # etc. All this is because there currently exists no unified, consistent
115 # way for top level CC information to be passed down to target directories:
116 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
117 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
118 # crosses can be removed.
120 # If Canadian cross, then don't pick up tools from the build directory.
121 # Used in GLIBCXX_EXPORT_INCLUDES (and nowhere else?).
122 if test -n "$with_cross_host" &&
123 test x"$build" != x"$with_cross_host" &&
124 test x"$build" != x"$target";
131 # Construct crosses by hand, eliminating bits that need ld...
132 # GLIBCXX_CHECK_COMPILER_FEATURES
133 # GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
134 # GLIBCXX_CHECK_MATH_SUPPORT
136 # First, test for "known" system libraries. We may be using newlib even
137 # on a hosted environment.
138 if test "x${with_newlib}" = "xyes"; then
139 os_include_dir="os/newlib"
140 AC_DEFINE(HAVE_HYPOT)
142 # GLIBCXX_CHECK_STDLIB_SUPPORT
143 AC_DEFINE(HAVE_STRTOF)
144 AC_DEFINE(HAVE_STRTOLD)
148 AC_DEFINE(HAVE_ACOSF)
149 AC_DEFINE(HAVE_ASINF)
150 AC_DEFINE(HAVE_ATAN2F)
151 AC_DEFINE(HAVE_ATANF)
152 AC_DEFINE(HAVE_CEILF)
153 AC_DEFINE(HAVE_COPYSIGN)
154 AC_DEFINE(HAVE_COPYSIGNF)
156 AC_DEFINE(HAVE_COSHF)
158 AC_DEFINE(HAVE_FABSF)
159 AC_DEFINE(HAVE_FLOORF)
160 AC_DEFINE(HAVE_FMODF)
161 AC_DEFINE(HAVE_FREXPF)
162 AC_DEFINE(HAVE_LDEXPF)
163 AC_DEFINE(HAVE_LOG10F)
165 AC_DEFINE(HAVE_MODFF)
168 AC_DEFINE(HAVE_SINHF)
169 AC_DEFINE(HAVE_SQRTF)
171 AC_DEFINE(HAVE_TANHF)
173 m4_include([crossconfig.m4])
176 # At some point, we should differentiate between architectures
177 # like x86, which have long double versions, and alpha/powerpc/etc.,
178 # which don't. For the time being, punt.
179 if test x"long_double_math_on_this_cpu" = x"yes"; then
180 AC_DEFINE(HAVE_ACOSL)
181 AC_DEFINE(HAVE_ASINL)
182 AC_DEFINE(HAVE_ATAN2L)
183 AC_DEFINE(HAVE_ATANL)
184 AC_DEFINE(HAVE_CEILL)
185 AC_DEFINE(HAVE_COPYSIGNL)
187 AC_DEFINE(HAVE_COSHL)
189 AC_DEFINE(HAVE_FABSL)
190 AC_DEFINE(HAVE_FLOORL)
191 AC_DEFINE(HAVE_FMODL)
192 AC_DEFINE(HAVE_FREXPL)
193 AC_DEFINE(HAVE_LDEXPL)
194 AC_DEFINE(HAVE_LOG10L)
196 AC_DEFINE(HAVE_MODFL)
198 AC_DEFINE(HAVE_SINCOSL)
200 AC_DEFINE(HAVE_SINHL)
201 AC_DEFINE(HAVE_SQRTL)
203 AC_DEFINE(HAVE_TANHL)
208 # We are being configured natively. We can do more elaborate tests that
209 # include AC_TRY_COMPILE now, as the linker is assumed to be working.
210 GLIBCXX_IS_NATIVE=true
213 # Check for available headers.
214 AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
215 machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h \
218 GLIBCXX_CHECK_COMPILER_FEATURES
219 GLIBCXX_CHECK_LINKER_FEATURES
220 GLIBCXX_CHECK_MATH_SUPPORT
221 GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
222 GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
223 GLIBCXX_CHECK_WCHAR_T_SUPPORT
224 GLIBCXX_CHECK_STDLIB_SUPPORT
226 # For showmanyc_helper().
227 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
229 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
232 AC_CHECK_HEADERS(sys/uio.h)
238 [#include <setjmp.h>],
240 while (! sigsetjmp (env, 1))
243 [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])])
248 # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
249 GLIBCXX_ENABLE_SYMVERS([yes])
251 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
252 GLIBCXX_CONFIGURE_TESTSUITE
254 # Propagate the target-specific source directories through the build chain.
255 # (Nothing currently uses cpu_include_dir directly; only atomicity_include_dir
256 # uses it, and it only gets used in this file.)
257 ATOMICITY_INC_SRCDIR=config/${atomicity_include_dir}
258 OS_INC_SRCDIR=config/${os_include_dir}
259 FPOS_INC_SRCDIR=config/${fpos_include_dir}
260 AC_SUBST(ATOMICITY_INC_SRCDIR)
261 AC_SUBST(FPOS_INC_SRCDIR)
262 AC_SUBST(OS_INC_SRCDIR)
264 # Determine cross-compile flags and AM_CONDITIONALs.
265 #AC_SUBST(GLIBCXX_IS_NATIVE)
266 AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
267 # from GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT:
268 AM_CONDITIONAL(GLIBCXX_BUILD_LIBMATH, test $need_libmath = yes)
272 if test ${multilib} = yes; then
273 multilib_arg="--enable-multilib"
278 # Export all the install information
279 GLIBCXX_EXPORT_INSTALL_INFO
281 # Export all the include and flag information to Makefiles.
282 GLIBCXX_EXPORT_INCLUDES
285 if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features |
286 grep "enable shared" > /dev/null;
288 LIBSUPCXX_PICFLAGS=-prefer-pic
292 AC_SUBST(LIBSUPCXX_PICFLAGS)
294 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
295 dnl which can all be called multiple times as needed, plus one (different)
296 dnl AC_OUPUT macro. This one lists the files to be created:
306 AC_CONFIG_FILES([scripts/check_survey],[chmod +x scripts/check_survey])
307 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
309 dnl These commands are run at the end of config.status:
310 AC_CONFIG_COMMANDS([default],
311 [if test -n "$CONFIG_FILES"; then
312 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
313 # that multilib installs will end up installed in the correct place.
314 # The testsuite needs it for multilib-aware ABI baseline files.
315 # To work around this not being passed down from config-ml.in ->
316 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
317 # append it here. Only modify Makefiles that have just been created.
318 for i in src libsupc++ testsuite; do
319 case $CONFIG_FILES in
321 #echo "Adding MULTISUBDIR to $i/Makefile"
322 grep '^MULTISUBDIR =' Makefile >> $i/Makefile
327 (cd include && ${MAKE-make})
330 # No init-vars needed so far which aren't already passed by autoconf.
333 dnl And this actually makes things happen: