1# Process this file with autoconf to produce a configure script, like so:
2# aclocal && autoconf && autoheader && automake
3
4AC_PREREQ(2.57)
5AC_INIT(package-unused, version-unused,, libstdc++)
6AC_CONFIG_SRCDIR(src/ios.cc)
7AC_CONFIG_HEADER(config.h)
8
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
14
15# For libtool versioning info, format is CURRENT:REVISION:AGE
16libtool_VERSION=6:2:0
17AC_SUBST(libtool_VERSION)
18
19# Find the rest of the source tree framework.
20GLIBCXX_TOPREL_CONFIGURE
21
22# Gets build, host, target, *_vendor, *_cpu, *_os, etc.
23#
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.  :-)
30#
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 $with_cross_host.
33#
34# Do not delete or change the following two lines.  For why, see
35# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
36AC_CANONICAL_SYSTEM
37target_alias=${target_alias-$host_alias}
38
39# Handy for debugging:
40#AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
41
42if test "$build" != "$host"; then
43  # We are being configured with some form of cross compiler.
44  GLIBCXX_IS_NATIVE=false
45  GCC_NO_EXECUTABLES
46else
47  GLIBCXX_IS_NATIVE=true
48fi
49
50# Sets up automake.  Must come after AC_CANONICAL_SYSTEM.  Each of the
51# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
52#  1.x:  minimum required version
53#  no-define:  PACKAGE and VERSION will not be #define'd in config.h (a bunch
54#              of other PACKAGE_* variables will, however, and there's nothing
55#              we can do about that; they come from AC_INIT).
56#  foreign:  we don't follow the normal rules for GNU packages (no COPYING
57#            file in the top srcdir, etc, etc), so stop complaining.
58#  no-dependencies:  turns off auto dependency generation (just for now)
59#  -Wall:  turns on all automake warnings...
60#  -Wno-portability:  ...except this one, since GNU make is now required.
61AM_INIT_AUTOMAKE([1.7.6 no-define foreign no-dependencies -Wall -Wno-portability])
62
63# Runs configure.host, finds CC, CXX, and assorted other critical bits.  Sets
64# up critical shell variables.
65GLIBCXX_CONFIGURE
66
67#AC_MSG_NOTICE([====== Starting libtool configuration])
68AC_LIBTOOL_DLOPEN
69AM_PROG_LIBTOOL
70AC_SUBST(enable_shared)
71AC_SUBST(enable_static)
72#AC_MSG_NOTICE([====== Finished libtool configuration]) ; sleep 10
73
74# Possibly disable most of the library.
75## XXX Consider skipping unncessary tests altogether in this case, rather
76## than just ignoring the results.  Faster /and/ more correct, win win.
77GLIBCXX_ENABLE_HOSTED
78
79# Check for support bits and g++ features that don't require linking.
80GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
81GLIBCXX_ENABLE_PCH($is_hosted)
82
83# Enable all the variable C++ runtime options.
84# NB: C_MBCHAR must come early.
85GLIBCXX_ENABLE_CSTDIO
86GLIBCXX_ENABLE_CLOCALE
87GLIBCXX_ENABLE_ALLOCATOR
88GLIBCXX_ENABLE_CHEADERS($c_model)  dnl c_model from configure.host
89GLIBCXX_ENABLE_C_MBCHAR([yes])
90GLIBCXX_ENABLE_C99([yes])
91GLIBCXX_ENABLE_LONG_LONG([yes])
92GLIBCXX_ENABLE_THREADS
93GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
94GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
95GLIBCXX_ENABLE_DEBUG([no])
96GLIBCXX_ENABLE_CXX_FLAGS
97
98# No surprises, no surprises...
99if 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.])
104  else
105    AC_MSG_WARN([They will be faked using a mutex.])
106    AC_MSG_WARN([Performance of certain classes will degrade as a result.])
107  fi
108fi
109
110
111if $GLIBCXX_IS_NATIVE; then
112
113  # We can do more elaborate tests that assume a working linker.
114  CANADIAN=no
115
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 \
119  sys/types.h])
120
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
128
129  # For showmanyc_helper().
130  AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
131  GLIBCXX_CHECK_POLL
132  GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
133
134  # For xsputn_2().
135  AC_CHECK_HEADERS(sys/uio.h)
136  GLIBCXX_CHECK_WRITEV
137
138  # For the __streamoff_base_type typedef.
139  GLIBCXX_CHECK_INT64_T
140
141  # For LFS support.
142  GLIBCXX_CHECK_LFS
143
144  AC_LC_MESSAGES
145
146  AC_TRY_COMPILE(
147    [#include <setjmp.h>],
148    [sigjmp_buf env;
149     while (! sigsetjmp (env, 1))
150       siglongjmp (env, 1);
151    ],
152    [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])])
153
154  AC_FUNC_MMAP
155
156else
157
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.
161  #
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.
171
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";
177  then
178    CANADIAN=yes
179  else
180    CANADIAN=no
181  fi
182
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
187
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)
193
194    # GLIBCXX_CHECK_STDLIB_SUPPORT
195    AC_DEFINE(HAVE_STRTOF)
196    AC_DEFINE(HAVE_STRTOLD)
197    # AC_FUNC_MMAP
198    AC_DEFINE(HAVE_MMAP)
199
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)
207    AC_DEFINE(HAVE_COSF)
208    AC_DEFINE(HAVE_COSHF)
209    AC_DEFINE(HAVE_EXPF)
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)
216    AC_DEFINE(HAVE_LOGF)
217    AC_DEFINE(HAVE_MODFF)
218    AC_DEFINE(HAVE_POWF)
219    AC_DEFINE(HAVE_SINF)
220    AC_DEFINE(HAVE_SINHF)
221    AC_DEFINE(HAVE_SQRTF)
222    AC_DEFINE(HAVE_TANF)
223    AC_DEFINE(HAVE_TANHF)
224
225    AC_DEFINE(HAVE_S_ISREG)
226    AC_DEFINE(HAVE_S_IFREG)
227  else
228    m4_include([crossconfig.m4])
229  fi
230
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)
241    AC_DEFINE(HAVE_COSL)
242    AC_DEFINE(HAVE_COSHL)
243    AC_DEFINE(HAVE_EXPL)
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)
250    AC_DEFINE(HAVE_LOGL)
251    AC_DEFINE(HAVE_MODFL)
252    AC_DEFINE(HAVE_POWL)
253    AC_DEFINE(HAVE_SINCOSL)
254    AC_DEFINE(HAVE_SINL)
255    AC_DEFINE(HAVE_SINHL)
256    AC_DEFINE(HAVE_SQRTL)
257    AC_DEFINE(HAVE_TANL)
258    AC_DEFINE(HAVE_TANHL)
259  fi
260
261fi
262
263# This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
264GLIBCXX_ENABLE_SYMVERS([yes])
265
266# This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
267GLIBCXX_CONFIGURE_TESTSUITE
268
269# Propagate the target-specific source directories through the build chain.
270# (Nothing currently uses cpu_include_dir directly; only atomicity_include_dir
271# uses it, and it only gets used in this file.)
272ATOMICITY_SRCDIR=config/${atomicity_dir}
273ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
274OS_INC_SRCDIR=config/${os_include_dir}
275AC_SUBST(ATOMICITY_SRCDIR)
276AC_SUBST(ATOMIC_WORD_SRCDIR)
277AC_SUBST(OS_INC_SRCDIR)
278
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)
284GLIBCXX_EVALUATE_CONDITIONALS
285
286AC_CACHE_SAVE
287
288if test ${multilib} = yes; then
289  multilib_arg="--enable-multilib"
290else
291  multilib_arg=
292fi
293
294# Export all the install information.
295GLIBCXX_EXPORT_INSTALL_INFO
296
297# Export all the include and flag information to Makefiles.
298GLIBCXX_EXPORT_INCLUDES
299GLIBCXX_EXPORT_FLAGS
300
301if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features |
302   grep "enable shared" > /dev/null;
303then
304  LIBSUPCXX_PICFLAGS=-prefer-pic
305else
306  LIBSUPCXX_PICFLAGS=
307fi
308AC_SUBST(LIBSUPCXX_PICFLAGS)
309
310dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
311dnl which can all be called multiple times as needed, plus one (different)
312dnl AC_OUTPUT macro.  This one lists the files to be created:
313AC_CONFIG_FILES( \
314  Makefile \
315  AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ])
316  )
317AC_CONFIG_FILES([scripts/check_survey],[chmod +x scripts/check_survey])
318AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
319
320dnl These commands are run at the end of config.status:
321AC_CONFIG_COMMANDS([default],
322[if test -n "$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.
329   #
330   # Also, get rid of this simulated-VPATH thing that automake does.
331   cat > vpsed << \_EOF
332s!`test -f '$<' || echo '$(srcdir)/'`!!
333_EOF
334   for i in $SUBDIRS; do
335    case $CONFIG_FILES in
336     *${i}/Makefile*)
337       #echo "Adding MULTISUBDIR to $i/Makefile"
338       sed -f vpsed $i/Makefile > tmp
339       grep '^MULTISUBDIR =' Makefile >> tmp
340       mv tmp $i/Makefile
341       ;;
342    esac
343   done
344   rm vpsed
345 fi
346 (cd include && ${MAKE-make})
347],
348[
349# Variables needed in config.status (file generation) which aren't already
350# passed by autoconf.
351SUBDIRS="$SUBDIRS"
352])
353
354dnl And this actually makes things happen:
355AC_OUTPUT
356