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=6:15:0
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 $targetos = darwin ; then
54 GLIBCXX_IS_NATIVE=true
63 GLIBCXX_IS_NATIVE=true
66 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
67 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
68 # 1.x: minimum required version
69 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
70 # of other PACKAGE_* variables will, however, and there's nothing
71 # we can do about that; they come from AC_INIT).
72 # foreign: we don't follow the normal rules for GNU packages (no COPYING
73 # file in the top srcdir, etc, etc), so stop complaining.
74 # no-dependencies: turns off auto dependency generation (just for now)
75 # no-dist: we don't want 'dist' and related rules.
76 # -Wall: turns on all automake warnings...
77 # -Wno-portability: ...except this one, since GNU make is now required.
78 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies no-dist -Wall -Wno-portability -Wno-override])
79 AH_TEMPLATE(PACKAGE, [Name of package])
80 AH_TEMPLATE(VERSION, [Version number of package])
82 # -fno-builtin must be present here so that a non-conflicting form of
83 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
85 save_CXXFLAGS="$CXXFLAGS"
86 CXXFLAGS="$CXXFLAGS -fno-builtin"
89 CXXFLAGS="$save_CXXFLAGS"
91 # Runs configure.host, and assorted other critical bits. Sets
92 # up critical shell variables.
95 if test "x${with_newlib}" != "xyes"; then
99 AC_SUBST(enable_shared)
100 AC_SUBST(enable_static)
102 # Eliminate -lstdc++ addition to postdeps for cross compiles.
103 postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'`
105 # Possibly disable most of the library.
106 ## TODO: Consider skipping unncessary tests altogether in this case, rather
107 ## than just ignoring the results. Faster /and/ more correct, win win.
108 GLIBCXX_ENABLE_HOSTED
110 # Enable compiler support that doesn't require linking.
111 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
112 GLIBCXX_ENABLE_PCH($is_hosted)
113 GLIBCXX_ENABLE_THREADS
114 GLIBCXX_ENABLE_ATOMIC_BUILTINS
115 GLIBCXX_ENABLE_DECIMAL_FLOAT
117 # Checks for compiler support that doesn't require linking.
118 GLIBCXX_CHECK_COMPILER_FEATURES
120 # Enable all the variable C++ runtime options that don't require linking.
121 GLIBCXX_ENABLE_CSTDIO
122 GLIBCXX_ENABLE_CLOCALE
123 GLIBCXX_ENABLE_ALLOCATOR
124 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
125 GLIBCXX_ENABLE_LONG_LONG([yes])
126 GLIBCXX_ENABLE_WCHAR_T([yes])
127 GLIBCXX_ENABLE_C99([yes])
128 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
129 GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
130 GLIBCXX_ENABLE_DEBUG([no])
131 GLIBCXX_ENABLE_PARALLEL([yes])
132 GLIBCXX_ENABLE_CXX_FLAGS
133 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
135 # Checks for operating systems support that doesn't require linking.
136 GLIBCXX_CHECK_SYSTEM_ERROR
138 # For the streamoff typedef.
139 GLIBCXX_CHECK_INT64_T
144 # For showmanyc_helper().
145 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
147 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
150 AC_CHECK_HEADERS(sys/uio.h)
153 # For C99 support to TR1.
154 GLIBCXX_CHECK_C99_TR1
156 # For the EOF, SEEK_CUR, and SEEK_END integer constants.
157 GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS
159 # For gettimeofday support.
160 GLIBCXX_CHECK_GETTIMEOFDAY
162 # For clock_gettime, nanosleep and sched_yield support.
163 # NB: The default is [no], because otherwise it requires linking.
164 GLIBCXX_ENABLE_LIBSTDCXX_TIME([no])
166 # For gthread support
167 GLIBCXX_CHECK_GTHREADS
171 # Check for available headers.
172 AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
173 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
174 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
175 sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
178 # Only do link tests if native. Else, hardcode.
179 if $GLIBCXX_IS_NATIVE; then
181 # We can do more elaborate tests that assume a working linker.
184 GLIBCXX_CHECK_LINKER_FEATURES
185 GLIBCXX_CHECK_MATH_SUPPORT
186 GLIBCXX_CHECK_STDLIB_SUPPORT
188 # For /dev/random and /dev/urandom for TR1.
189 GLIBCXX_CHECK_RANDOM_TR1
199 # This lets us hard-code the functionality we know we'll have in the cross
200 # target environment. "Let" is a sugar-coated word placed on an especially
201 # dull and tedious hack, actually.
203 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
204 # that involve linking, can't be used:
205 # "cannot open sim-crt0.o"
206 # "cannot open crt0.o"
207 # etc. All this is because there currently exists no unified, consistent
208 # way for top level CC information to be passed down to target directories:
209 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
210 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
211 # crosses can be removed.
213 # If Canadian cross, then don't pick up tools from the build directory.
214 # Used only in GLIBCXX_EXPORT_INCLUDES.
215 if test -n "$with_cross_host" &&
216 test x"$build_alias" != x"$with_cross_host" &&
217 test x"$build" != x"$target";
224 # Construct crosses by hand, eliminating bits that need ld...
225 # GLIBCXX_CHECK_MATH_SUPPORT
227 # First, test for "known" system libraries. We may be using newlib even
228 # on a hosted environment.
229 if test "x${with_newlib}" = "xyes"; then
230 os_include_dir="os/newlib"
231 AC_DEFINE(HAVE_HYPOT)
233 # GLIBCXX_CHECK_STDLIB_SUPPORT
234 AC_DEFINE(HAVE_STRTOF)
236 AC_DEFINE(HAVE_ACOSF)
237 AC_DEFINE(HAVE_ASINF)
238 AC_DEFINE(HAVE_ATAN2F)
239 AC_DEFINE(HAVE_ATANF)
240 AC_DEFINE(HAVE_CEILF)
242 AC_DEFINE(HAVE_COSHF)
244 AC_DEFINE(HAVE_FABSF)
245 AC_DEFINE(HAVE_FLOORF)
246 AC_DEFINE(HAVE_FMODF)
247 AC_DEFINE(HAVE_FREXPF)
248 AC_DEFINE(HAVE_LDEXPF)
249 AC_DEFINE(HAVE_LOG10F)
251 AC_DEFINE(HAVE_MODFF)
254 AC_DEFINE(HAVE_SINHF)
255 AC_DEFINE(HAVE_SQRTF)
257 AC_DEFINE(HAVE_TANHF)
259 AC_DEFINE(HAVE_ICONV)
264 # At some point, we should differentiate between architectures
265 # like x86, which have long double versions, and alpha/powerpc/etc.,
266 # which don't. For the time being, punt.
267 if test x"long_double_math_on_this_cpu" = x"yes"; then
268 AC_DEFINE(HAVE_ACOSL)
269 AC_DEFINE(HAVE_ASINL)
270 AC_DEFINE(HAVE_ATAN2L)
271 AC_DEFINE(HAVE_ATANL)
272 AC_DEFINE(HAVE_CEILL)
274 AC_DEFINE(HAVE_COSHL)
276 AC_DEFINE(HAVE_FABSL)
277 AC_DEFINE(HAVE_FLOORL)
278 AC_DEFINE(HAVE_FMODL)
279 AC_DEFINE(HAVE_FREXPL)
280 AC_DEFINE(HAVE_LDEXPL)
281 AC_DEFINE(HAVE_LOG10L)
283 AC_DEFINE(HAVE_MODFL)
285 AC_DEFINE(HAVE_SINCOSL)
287 AC_DEFINE(HAVE_SINHL)
288 AC_DEFINE(HAVE_SQRTL)
290 AC_DEFINE(HAVE_TANHL)
294 # Check for _Unwind_GetIPInfo.
295 GCC_CHECK_UNWIND_GETIPINFO
298 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
300 GCC_HEADER_STDINT(include/gstdint.h)
302 # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
303 GLIBCXX_ENABLE_SYMVERS([yes])
304 GLIBCXX_ENABLE_VISIBILITY([yes])
308 powerpc*-*-linux* | \
314 #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
315 #error no need for long double compatibility
317 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
318 if test "$ac_ldbl_compat" = yes; then
319 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
320 [Define if compatibility should be provided for -mlong-double-64.])
321 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
324 GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
326 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
327 GLIBCXX_CONFIGURE_TESTSUITE
329 # Propagate the target-specific source directories through the build chain.
330 ATOMICITY_SRCDIR=config/${atomicity_dir}
331 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
332 ATOMIC_FLAGS=${atomic_flags}
333 CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
334 OS_INC_SRCDIR=config/${os_include_dir}
335 ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
336 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
337 AC_SUBST(ATOMICITY_SRCDIR)
338 AC_SUBST(ATOMIC_WORD_SRCDIR)
339 AC_SUBST(ATOMIC_FLAGS)
340 AC_SUBST(CPU_DEFINES_SRCDIR)
341 AC_SUBST(ABI_TWEAKS_SRCDIR)
342 AC_SUBST(OS_INC_SRCDIR)
343 AC_SUBST(ERROR_CONSTANTS_SRCDIR)
346 # Determine cross-compile flags and AM_CONDITIONALs.
347 #AC_SUBST(GLIBCXX_IS_NATIVE)
348 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
349 GLIBCXX_EVALUATE_CONDITIONALS
353 if test ${multilib} = yes; then
354 multilib_arg="--enable-multilib"
359 # Export all the install information.
360 GLIBCXX_EXPORT_INSTALL_INFO
362 # Export all the include and flag information to Makefiles.
363 GLIBCXX_EXPORT_INCLUDES
366 if test "$enable_shared" = yes; then
367 LIBSUPCXX_PICFLAGS="-prefer-pic"
371 AC_SUBST(LIBSUPCXX_PICFLAGS)
373 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
374 dnl which can all be called multiple times as needed, plus one (different)
375 dnl AC_OUTPUT macro. This one lists the files to be created:
376 AC_CONFIG_FILES(Makefile)
377 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
379 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
380 # that multilib installs will end up installed in the correct place.
381 # The testsuite needs it for multilib-aware ABI baseline files.
382 # To work around this not being passed down from config-ml.in ->
383 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
384 # append it here. Only modify Makefiles that have just been created.
386 # Also, get rid of this simulated-VPATH thing that automake does.
387 AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
388 [cat > vpsed$$ << \_EOF
389 s!`test -f '$<' || echo '$(srcdir)/'`!!
391 sed -f vpsed$$ $ac_file > tmp$$
394 echo 'MULTISUBDIR =' >> $ac_file
396 . ${multi_basedir}/config-ml.in
397 AS_UNSET([ml_norecursion])
400 AC_CONFIG_COMMANDS([generate-headers],
401 [(cd include && ${MAKE-make} pch_build= )])
403 dnl And this actually makes things happen: