1# Process this file with autoreconf to produce a configure script. 2 3AC_PREREQ(2.64) 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=6:14:0 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 $targetos = darwin ; then 54 GLIBCXX_IS_NATIVE=true 55 fi 56 ;; 57 58 *) 59 GCC_NO_EXECUTABLES 60 ;; 61 esac 62else 63 GLIBCXX_IS_NATIVE=true 64fi 65 66# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the 67# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. 68# 1.x: minimum required version 69# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch 70# of other PACKAGE_* variables will, however, and there's nothing 71# we can do about that; they come from AC_INIT). 72# foreign: we don't follow the normal rules for GNU packages (no COPYING 73# file in the top srcdir, etc, etc), so stop complaining. 74# no-dependencies: turns off auto dependency generation (just for now) 75# -Wall: turns on all automake warnings... 76# -Wno-portability: ...except this one, since GNU make is now required. 77AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies -Wall -Wno-portability -Wno-override]) 78AH_TEMPLATE(PACKAGE, [Name of package]) 79AH_TEMPLATE(VERSION, [Version number of package]) 80 81# -fno-builtin must be present here so that a non-conflicting form of 82# std::exit can be guessed by AC_PROG_CXX, and used in later tests. 83 84save_CXXFLAGS="$CXXFLAGS" 85CXXFLAGS="$CXXFLAGS -fno-builtin" 86AC_PROG_CC 87AC_PROG_CXX 88CXXFLAGS="$save_CXXFLAGS" 89 90# Runs configure.host, and assorted other critical bits. Sets 91# up critical shell variables. 92GLIBCXX_CONFIGURE 93 94if test "x${with_newlib}" != "xyes"; then 95 AC_LIBTOOL_DLOPEN 96fi 97AM_PROG_LIBTOOL 98AC_SUBST(enable_shared) 99AC_SUBST(enable_static) 100 101# Eliminate -lstdc++ addition to postdeps for cross compiles. 102postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'` 103 104# Possibly disable most of the library. 105## TODO: Consider skipping unncessary tests altogether in this case, rather 106## than just ignoring the results. Faster /and/ more correct, win win. 107GLIBCXX_ENABLE_HOSTED 108 109# Enable compiler support that doesn't require linking. 110GLIBCXX_ENABLE_SJLJ_EXCEPTIONS 111GLIBCXX_ENABLE_PCH($is_hosted) 112GLIBCXX_ENABLE_THREADS 113GLIBCXX_ENABLE_ATOMIC_BUILTINS 114GLIBCXX_ENABLE_DECIMAL_FLOAT 115 116# Checks for compiler support that doesn't require linking. 117GLIBCXX_CHECK_COMPILER_FEATURES 118 119# Enable all the variable C++ runtime options that don't require linking. 120GLIBCXX_ENABLE_CSTDIO 121GLIBCXX_ENABLE_CLOCALE 122GLIBCXX_ENABLE_ALLOCATOR 123GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host 124GLIBCXX_ENABLE_LONG_LONG([yes]) 125GLIBCXX_ENABLE_WCHAR_T([yes]) 126GLIBCXX_ENABLE_C99([yes]) 127GLIBCXX_ENABLE_CONCEPT_CHECKS([no]) 128GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"]) 129GLIBCXX_ENABLE_DEBUG([no]) 130GLIBCXX_ENABLE_PARALLEL([yes]) 131GLIBCXX_ENABLE_CXX_FLAGS 132GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no]) 133 134# Checks for operating systems support that doesn't require linking. 135GLIBCXX_CHECK_SYSTEM_ERROR 136 137# For the streamoff typedef. 138GLIBCXX_CHECK_INT64_T 139 140# For LFS support. 141GLIBCXX_CHECK_LFS 142 143# For showmanyc_helper(). 144AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h) 145GLIBCXX_CHECK_POLL 146GLIBCXX_CHECK_S_ISREG_OR_S_IFREG 147 148# For xsputn_2(). 149AC_CHECK_HEADERS(sys/uio.h) 150GLIBCXX_CHECK_WRITEV 151 152# For C99 support to TR1. 153GLIBCXX_CHECK_C99_TR1 154 155# For common values of EOF, SEEK_CUR, SEEK_END. 156GLIBCXX_CHECK_STDIO_MACROS 157 158# For gettimeofday support. 159GLIBCXX_CHECK_GETTIMEOFDAY 160 161# For clock_gettime, nanosleep and sched_yield support. 162# NB: The default is [no], because otherwise it requires linking. 163GLIBCXX_ENABLE_LIBSTDCXX_TIME([no]) 164 165# For gthread support 166GLIBCXX_CHECK_GTHREADS 167 168AC_LC_MESSAGES 169 170# Check for available headers. 171AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \ 172locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \ 173strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \ 174sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \ 175wchar.h wctype.h]) 176 177# Only do link tests if native. Else, hardcode. 178if $GLIBCXX_IS_NATIVE; then 179 180 # We can do more elaborate tests that assume a working linker. 181 CANADIAN=no 182 183 GLIBCXX_CHECK_LINKER_FEATURES 184 GLIBCXX_CHECK_MATH_SUPPORT 185 GLIBCXX_CHECK_STDLIB_SUPPORT 186 187 # For /dev/random and /dev/urandom for TR1. 188 GLIBCXX_CHECK_RANDOM_TR1 189 190 # For TLS support. 191 GCC_CHECK_TLS 192 193 # For iconv support. 194 AM_ICONV 195 196else 197 198 # This lets us hard-code the functionality we know we'll have in the cross 199 # target environment. "Let" is a sugar-coated word placed on an especially 200 # dull and tedious hack, actually. 201 # 202 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros 203 # that involve linking, can't be used: 204 # "cannot open sim-crt0.o" 205 # "cannot open crt0.o" 206 # etc. All this is because there currently exists no unified, consistent 207 # way for top level CC information to be passed down to target directories: 208 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc. 209 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for 210 # crosses can be removed. 211 212 # If Canadian cross, then don't pick up tools from the build directory. 213 # Used only in GLIBCXX_EXPORT_INCLUDES. 214 if test -n "$with_cross_host" && 215 test x"$build_alias" != x"$with_cross_host" && 216 test x"$build" != x"$target"; 217 then 218 CANADIAN=yes 219 else 220 CANADIAN=no 221 fi 222 223 # Construct crosses by hand, eliminating bits that need ld... 224 # GLIBCXX_CHECK_MATH_SUPPORT 225 226 # First, test for "known" system libraries. We may be using newlib even 227 # on a hosted environment. 228 if test "x${with_newlib}" = "xyes"; then 229 os_include_dir="os/newlib" 230 AC_DEFINE(HAVE_HYPOT) 231 232 # GLIBCXX_CHECK_STDLIB_SUPPORT 233 AC_DEFINE(HAVE_STRTOF) 234 235 AC_DEFINE(HAVE_ACOSF) 236 AC_DEFINE(HAVE_ASINF) 237 AC_DEFINE(HAVE_ATAN2F) 238 AC_DEFINE(HAVE_ATANF) 239 AC_DEFINE(HAVE_CEILF) 240 AC_DEFINE(HAVE_COSF) 241 AC_DEFINE(HAVE_COSHF) 242 AC_DEFINE(HAVE_EXPF) 243 AC_DEFINE(HAVE_FABSF) 244 AC_DEFINE(HAVE_FLOORF) 245 AC_DEFINE(HAVE_FMODF) 246 AC_DEFINE(HAVE_FREXPF) 247 AC_DEFINE(HAVE_LDEXPF) 248 AC_DEFINE(HAVE_LOG10F) 249 AC_DEFINE(HAVE_LOGF) 250 AC_DEFINE(HAVE_MODFF) 251 AC_DEFINE(HAVE_POWF) 252 AC_DEFINE(HAVE_SINF) 253 AC_DEFINE(HAVE_SINHF) 254 AC_DEFINE(HAVE_SQRTF) 255 AC_DEFINE(HAVE_TANF) 256 AC_DEFINE(HAVE_TANHF) 257 258 AC_DEFINE(HAVE_ICONV) 259 else 260 GLIBCXX_CROSSCONFIG 261 fi 262 263 # At some point, we should differentiate between architectures 264 # like x86, which have long double versions, and alpha/powerpc/etc., 265 # which don't. For the time being, punt. 266 if test x"long_double_math_on_this_cpu" = x"yes"; then 267 AC_DEFINE(HAVE_ACOSL) 268 AC_DEFINE(HAVE_ASINL) 269 AC_DEFINE(HAVE_ATAN2L) 270 AC_DEFINE(HAVE_ATANL) 271 AC_DEFINE(HAVE_CEILL) 272 AC_DEFINE(HAVE_COSL) 273 AC_DEFINE(HAVE_COSHL) 274 AC_DEFINE(HAVE_EXPL) 275 AC_DEFINE(HAVE_FABSL) 276 AC_DEFINE(HAVE_FLOORL) 277 AC_DEFINE(HAVE_FMODL) 278 AC_DEFINE(HAVE_FREXPL) 279 AC_DEFINE(HAVE_LDEXPL) 280 AC_DEFINE(HAVE_LOG10L) 281 AC_DEFINE(HAVE_LOGL) 282 AC_DEFINE(HAVE_MODFL) 283 AC_DEFINE(HAVE_POWL) 284 AC_DEFINE(HAVE_SINCOSL) 285 AC_DEFINE(HAVE_SINL) 286 AC_DEFINE(HAVE_SINHL) 287 AC_DEFINE(HAVE_SQRTL) 288 AC_DEFINE(HAVE_TANL) 289 AC_DEFINE(HAVE_TANHL) 290 fi 291fi 292 293# Check for _Unwind_GetIPInfo. 294GCC_CHECK_UNWIND_GETIPINFO 295 296 297GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])]) 298 299GCC_HEADER_STDINT(include/gstdint.h) 300 301# This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. 302GLIBCXX_ENABLE_SYMVERS([yes]) 303GLIBCXX_ENABLE_VISIBILITY([yes]) 304 305ac_ldbl_compat=no 306case "$target" in 307 powerpc*-*-linux* | \ 308 powerpc*-*-gnu* | \ 309 sparc*-*-linux* | \ 310 s390*-*-linux* | \ 311 alpha*-*-linux*) 312 AC_TRY_COMPILE(, [ 313#if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__)) 314#error no need for long double compatibility 315#endif 316 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no]) 317 if test "$ac_ldbl_compat" = yes; then 318 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1, 319 [Define if compatibility should be provided for -mlong-double-64.]) 320 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver" 321 fi 322esac 323GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes) 324 325# This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE. 326GLIBCXX_CONFIGURE_TESTSUITE 327 328# Propagate the target-specific source directories through the build chain. 329ATOMICITY_SRCDIR=config/${atomicity_dir} 330ATOMIC_WORD_SRCDIR=config/${atomic_word_dir} 331ATOMIC_FLAGS=${atomic_flags} 332CPU_DEFINES_SRCDIR=config/${cpu_defines_dir} 333OS_INC_SRCDIR=config/${os_include_dir} 334ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir} 335ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir} 336AC_SUBST(ATOMICITY_SRCDIR) 337AC_SUBST(ATOMIC_WORD_SRCDIR) 338AC_SUBST(ATOMIC_FLAGS) 339AC_SUBST(CPU_DEFINES_SRCDIR) 340AC_SUBST(ABI_TWEAKS_SRCDIR) 341AC_SUBST(OS_INC_SRCDIR) 342AC_SUBST(ERROR_CONSTANTS_SRCDIR) 343 344 345# Determine cross-compile flags and AM_CONDITIONALs. 346#AC_SUBST(GLIBCXX_IS_NATIVE) 347#AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes) 348GLIBCXX_EVALUATE_CONDITIONALS 349 350AC_CACHE_SAVE 351 352if test ${multilib} = yes; then 353 multilib_arg="--enable-multilib" 354else 355 multilib_arg= 356fi 357 358# Export all the install information. 359GLIBCXX_EXPORT_INSTALL_INFO 360 361# Export all the include and flag information to Makefiles. 362GLIBCXX_EXPORT_INCLUDES 363GLIBCXX_EXPORT_FLAGS 364 365if test "$enable_shared" = yes; then 366 LIBSUPCXX_PICFLAGS="-prefer-pic" 367else 368 LIBSUPCXX_PICFLAGS= 369fi 370AC_SUBST(LIBSUPCXX_PICFLAGS) 371 372dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros, 373dnl which can all be called multiple times as needed, plus one (different) 374dnl AC_OUTPUT macro. This one lists the files to be created: 375AC_CONFIG_FILES(Makefile) 376AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags]) 377 378# Multilibs need MULTISUBDIR defined correctly in certain makefiles so 379# that multilib installs will end up installed in the correct place. 380# The testsuite needs it for multilib-aware ABI baseline files. 381# To work around this not being passed down from config-ml.in -> 382# srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually 383# append it here. Only modify Makefiles that have just been created. 384# 385# Also, get rid of this simulated-VPATH thing that automake does. 386AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]), 387 [cat > vpsed$$ << \_EOF 388s!`test -f '$<' || echo '$(srcdir)/'`!! 389_EOF 390 sed -f vpsed$$ $ac_file > tmp$$ 391 mv tmp$$ $ac_file 392 rm vpsed$$ 393 echo 'MULTISUBDIR =' >> $ac_file 394 ml_norecursion=yes 395 . ${multi_basedir}/config-ml.in 396 AS_UNSET([ml_norecursion]) 397]) 398 399AC_CONFIG_COMMANDS([generate-headers], 400 [(cd include && ${MAKE-make} pch_build= )]) 401 402dnl And this actually makes things happen: 403AC_OUTPUT 404