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