1# Process this file with autoreconf to produce a configure script. 2 3AC_PREREQ(2.59) 4AC_INIT(package-unused, version-unused,, libstdc++) 5AC_CONFIG_SRCDIR(src/ios.cc) 6AC_CONFIG_HEADER(config.h) 7 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 13 14# For libtool versioning info, format is CURRENT:REVISION:AGE 15libtool_VERSION=6:9:0 16AC_SUBST(libtool_VERSION) 17 18# Find the rest of the source tree framework. 19AM_ENABLE_MULTILIB(, ..) 20 21# Gets build, host, target, *_vendor, *_cpu, *_os, etc. 22# 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. :-) 29# 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 $with_cross_host. 32# 33# Do not delete or change the following two lines. For why, see 34# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html 35AC_CANONICAL_SYSTEM 36target_alias=${target_alias-$host_alias} 37 38# Handy for debugging: 39#AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5 40 41if test "$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 $targetos = darwin ; then 54 GLIBCXX_IS_NATIVE=true 55 fi 56 ;; 57 58 *) 59 GCC_NO_EXECUTABLES 60 ;; 61 esac 62else 63 GLIBCXX_IS_NATIVE=true 64fi 65 66# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the 67# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. 68# 1.x: minimum required version 69# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch 70# of other PACKAGE_* variables will, however, and there's nothing 71# we can do about that; they come from AC_INIT). 72# foreign: we don't follow the normal rules for GNU packages (no COPYING 73# file in the top srcdir, etc, etc), so stop complaining. 74# no-dependencies: turns off auto dependency generation (just for now) 75# -Wall: turns on all automake warnings... 76# -Wno-portability: ...except this one, since GNU make is now required. 77AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies -Wall -Wno-portability -Wno-override]) 78AH_TEMPLATE(PACKAGE, [Name of package]) 79AH_TEMPLATE(VERSION, [Version number of package]) 80 81# Runs configure.host, finds CC, CXX, and assorted other critical bits. Sets 82# up critical shell variables. 83GLIBCXX_CONFIGURE 84 85AC_LIBTOOL_DLOPEN 86AM_PROG_LIBTOOL 87AC_SUBST(enable_shared) 88AC_SUBST(enable_static) 89 90# Possibly disable most of the library. 91## TODO: Consider skipping unncessary tests altogether in this case, rather 92## than just ignoring the results. Faster /and/ more correct, win win. 93GLIBCXX_ENABLE_HOSTED 94 95# Check for compiler support that doesn't require linking. 96GLIBCXX_ENABLE_SJLJ_EXCEPTIONS 97GLIBCXX_ENABLE_PCH($is_hosted) 98 99# Enable all the variable C++ runtime options. 100GLIBCXX_ENABLE_CSTDIO 101GLIBCXX_ENABLE_CLOCALE 102GLIBCXX_ENABLE_ALLOCATOR 103GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host 104GLIBCXX_ENABLE_LONG_LONG([yes]) 105GLIBCXX_ENABLE_WCHAR_T([yes]) 106GLIBCXX_ENABLE_C99([yes]) 107GLIBCXX_ENABLE_CONCEPT_CHECKS([no]) 108GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"]) 109GLIBCXX_ENABLE_DEBUG([no]) 110GLIBCXX_ENABLE_CXX_FLAGS 111GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no]) 112 113# No surprises, no surprises... 114GLIBCXX_ENABLE_THREADS 115GLIBCXX_ENABLE_ATOMIC_BUILTINS 116if test $atomicity_dir = cpu/generic/atomic_mutex ; then 117 AC_MSG_WARN([No native atomic operations are provided for this platform.]) 118 if test $target_thread_file = single; then 119 AC_MSG_WARN([They cannot be faked when thread support is disabled.]) 120 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) 121 else 122 AC_MSG_WARN([They will be faked using a mutex.]) 123 AC_MSG_WARN([Performance of certain classes will degrade as a result.]) 124 fi 125fi 126 127GLIBCXX_CHECK_COMPILER_FEATURES 128 129if $GLIBCXX_IS_NATIVE; then 130 131 # We can do more elaborate tests that assume a working linker. 132 CANADIAN=no 133 134 # Check for available headers. 135 AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \ 136 machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h \ 137 sys/types.h sys/ipc.h sys/sem.h]) 138 139 GLIBCXX_CHECK_LINKER_FEATURES 140 GLIBCXX_CHECK_MATH_SUPPORT 141 GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT 142 GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT 143 GLIBCXX_CHECK_ICONV_SUPPORT 144 GLIBCXX_CHECK_STDLIB_SUPPORT 145 146 # For showmanyc_helper(). 147 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h) 148 GLIBCXX_CHECK_POLL 149 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG 150 151 # For xsputn_2(). 152 AC_CHECK_HEADERS(sys/uio.h) 153 GLIBCXX_CHECK_WRITEV 154 155 # For the __streamoff_base_type typedef. 156 GLIBCXX_CHECK_INT64_T 157 158 # For LFS support. 159 GLIBCXX_CHECK_LFS 160 161 # For C99 support to TR1. 162 GLIBCXX_CHECK_C99_TR1 163 164 # For dev/random and dev/urandom for TR1. 165 GLIBCXX_CHECK_RANDOM_TR1 166 167 # For TLS support. 168 GCC_CHECK_TLS 169 170 # For _Unwind_GetIPInfo. 171 GCC_CHECK_UNWIND_GETIPINFO 172 173 AC_LC_MESSAGES 174 175 AC_TRY_COMPILE( 176 [#include <setjmp.h>], 177 [sigjmp_buf env; 178 while (! sigsetjmp (env, 1)) 179 siglongjmp (env, 1); 180 ], 181 [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])]) 182 183 AC_FUNC_MMAP 184 185else 186 187 # This lets us hard-code the functionality we know we'll have in the cross 188 # target environment. "Let" is a sugar-coated word placed on an especially 189 # dull and tedious hack, actually. 190 # 191 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros 192 # that involve linking, can't be used: 193 # "cannot open sim-crt0.o" 194 # "cannot open crt0.o" 195 # etc. All this is because there currently exists no unified, consistent 196 # way for top level CC information to be passed down to target directories: 197 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc. 198 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for 199 # crosses can be removed. 200 201 # If Canadian cross, then don't pick up tools from the build directory. 202 # Used only in GLIBCXX_EXPORT_INCLUDES. 203 if test -n "$with_cross_host" && 204 test x"$build_alias" != x"$with_cross_host" && 205 test x"$build" != x"$target"; 206 then 207 CANADIAN=yes 208 else 209 CANADIAN=no 210 fi 211 212 # Construct crosses by hand, eliminating bits that need ld... 213 # GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT 214 # GLIBCXX_CHECK_MATH_SUPPORT 215 216 # First, test for "known" system libraries. We may be using newlib even 217 # on a hosted environment. 218 if test "x${with_newlib}" = "xyes"; then 219 os_include_dir="os/newlib" 220 AC_DEFINE(HAVE_HYPOT) 221 222 # GLIBCXX_CHECK_STDLIB_SUPPORT 223 AC_DEFINE(HAVE_STRTOF) 224 # AC_FUNC_MMAP 225 AC_DEFINE(HAVE_MMAP) 226 227 AC_DEFINE(HAVE_ACOSF) 228 AC_DEFINE(HAVE_ASINF) 229 AC_DEFINE(HAVE_ATAN2F) 230 AC_DEFINE(HAVE_ATANF) 231 AC_DEFINE(HAVE_CEILF) 232 AC_DEFINE(HAVE_COPYSIGN) 233 AC_DEFINE(HAVE_COPYSIGNF) 234 AC_DEFINE(HAVE_COSF) 235 AC_DEFINE(HAVE_COSHF) 236 AC_DEFINE(HAVE_EXPF) 237 AC_DEFINE(HAVE_FABSF) 238 AC_DEFINE(HAVE_FLOORF) 239 AC_DEFINE(HAVE_FMODF) 240 AC_DEFINE(HAVE_FREXPF) 241 AC_DEFINE(HAVE_LDEXPF) 242 AC_DEFINE(HAVE_LOG10F) 243 AC_DEFINE(HAVE_LOGF) 244 AC_DEFINE(HAVE_MODFF) 245 AC_DEFINE(HAVE_POWF) 246 AC_DEFINE(HAVE_SINF) 247 AC_DEFINE(HAVE_SINHF) 248 AC_DEFINE(HAVE_SQRTF) 249 AC_DEFINE(HAVE_TANF) 250 AC_DEFINE(HAVE_TANHF) 251 252 AC_DEFINE(HAVE_S_ISREG) 253 AC_DEFINE(HAVE_S_IFREG) 254 else 255 GLIBCXX_CROSSCONFIG 256 fi 257 258 # At some point, we should differentiate between architectures 259 # like x86, which have long double versions, and alpha/powerpc/etc., 260 # which don't. For the time being, punt. 261 if test x"long_double_math_on_this_cpu" = x"yes"; then 262 AC_DEFINE(HAVE_ACOSL) 263 AC_DEFINE(HAVE_ASINL) 264 AC_DEFINE(HAVE_ATAN2L) 265 AC_DEFINE(HAVE_ATANL) 266 AC_DEFINE(HAVE_CEILL) 267 AC_DEFINE(HAVE_COPYSIGNL) 268 AC_DEFINE(HAVE_COSL) 269 AC_DEFINE(HAVE_COSHL) 270 AC_DEFINE(HAVE_EXPL) 271 AC_DEFINE(HAVE_FABSL) 272 AC_DEFINE(HAVE_FLOORL) 273 AC_DEFINE(HAVE_FMODL) 274 AC_DEFINE(HAVE_FREXPL) 275 AC_DEFINE(HAVE_LDEXPL) 276 AC_DEFINE(HAVE_LOG10L) 277 AC_DEFINE(HAVE_LOGL) 278 AC_DEFINE(HAVE_MODFL) 279 AC_DEFINE(HAVE_POWL) 280 AC_DEFINE(HAVE_SINCOSL) 281 AC_DEFINE(HAVE_SINL) 282 AC_DEFINE(HAVE_SINHL) 283 AC_DEFINE(HAVE_SQRTL) 284 AC_DEFINE(HAVE_TANL) 285 AC_DEFINE(HAVE_TANHL) 286 fi 287 288 # Assume we have _Unwind_GetIPInfo for cross-compiles. 289 AC_DEFINE(HAVE_GETIPINFO) 290 291fi 292 293# This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. 294GLIBCXX_ENABLE_SYMVERS([yes]) 295GLIBCXX_ENABLE_VISIBILITY([yes]) 296 297ac_ldbl_compat=no 298case "$target" in 299 powerpc*-*-*gnu* | \ 300 sparc*-*-linux* | \ 301 s390*-*-linux* | \ 302 alpha*-*-linux*) 303 AC_TRY_COMPILE(, [ 304#if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__)) 305#error no need for long double compatibility 306#endif 307 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no]) 308 if test "$ac_ldbl_compat" = yes; then 309 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1, 310 [Define if compatibility should be provided for -mlong-double-64.]) 311 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver" 312 fi 313esac 314GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes) 315 316# This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE. 317GLIBCXX_CONFIGURE_TESTSUITE 318 319# Propagate the target-specific source directories through the build chain. 320ATOMICITY_SRCDIR=config/${atomicity_dir} 321ATOMIC_WORD_SRCDIR=config/${atomic_word_dir} 322CPU_DEFINES_SRCDIR=config/${cpu_defines_dir} 323OS_INC_SRCDIR=config/${os_include_dir} 324ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir} 325AC_SUBST(ATOMICITY_SRCDIR) 326AC_SUBST(ATOMIC_WORD_SRCDIR) 327AC_SUBST(CPU_DEFINES_SRCDIR) 328AC_SUBST(ABI_TWEAKS_SRCDIR) 329AC_SUBST(OS_INC_SRCDIR) 330 331 332# Determine cross-compile flags and AM_CONDITIONALs. 333#AC_SUBST(GLIBCXX_IS_NATIVE) 334#AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes) 335# from GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT: 336#AM_CONDITIONAL(GLIBCXX_BUILD_LIBMATH, test $need_libmath = yes) 337GLIBCXX_EVALUATE_CONDITIONALS 338 339AC_CACHE_SAVE 340 341if test ${multilib} = yes; then 342 multilib_arg="--enable-multilib" 343else 344 multilib_arg= 345fi 346 347# Export all the install information. 348GLIBCXX_EXPORT_INSTALL_INFO 349 350# Export all the include and flag information to Makefiles. 351GLIBCXX_EXPORT_INCLUDES 352GLIBCXX_EXPORT_FLAGS 353 354if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features | 355 grep "enable shared" > /dev/null; 356then 357 LIBSUPCXX_PICFLAGS=-prefer-pic 358else 359 LIBSUPCXX_PICFLAGS= 360fi 361AC_SUBST(LIBSUPCXX_PICFLAGS) 362 363dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros, 364dnl which can all be called multiple times as needed, plus one (different) 365dnl AC_OUTPUT macro. This one lists the files to be created: 366AC_CONFIG_FILES( \ 367 Makefile \ 368 AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]) 369 ) 370AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags]) 371 372dnl These commands are run at the end of config.status: 373AC_CONFIG_COMMANDS([default], 374[if test -n "$CONFIG_FILES"; then 375 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so 376 # that multilib installs will end up installed in the correct place. 377 # The testsuite needs it for multilib-aware ABI baseline files. 378 # To work around this not being passed down from config-ml.in -> 379 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually 380 # append it here. Only modify Makefiles that have just been created. 381 # 382 # Also, get rid of this simulated-VPATH thing that automake does. 383 cat > vpsed << \_EOF 384s!`test -f '$<' || echo '$(srcdir)/'`!! 385_EOF 386 for i in $SUBDIRS; do 387 case $CONFIG_FILES in 388 *${i}/Makefile*) 389 #echo "Adding MULTISUBDIR to $i/Makefile" 390 sed -f vpsed $i/Makefile > tmp 391 grep '^MULTISUBDIR =' Makefile >> tmp 392 mv tmp $i/Makefile 393 ;; 394 esac 395 done 396 rm vpsed 397 fi 398 (cd include && ${MAKE-make}) 399], 400[ 401# Variables needed in config.status (file generation) which aren't already 402# passed by autoconf. 403SUBDIRS="$SUBDIRS" 404]) 405 406dnl And this actually makes things happen: 407AC_OUTPUT 408