# Process this file with autoreconf to produce a configure script. AC_PREREQ(2.59) AC_INIT(package-unused, version-unused,, libstdc++) AC_CONFIG_SRCDIR(src/ios.cc) AC_CONFIG_HEADER(config.h) # This works around the fact that libtool configuration may change LD # for this particular configuration, but some shells, instead of # keeping the changes in LD private, export them just because LD is # exported. Only used at the end of this file. ### am handles this now? ORIGINAL_LD_FOR_MULTILIBS=$LD # For libtool versioning info, format is CURRENT:REVISION:AGE libtool_VERSION=6:10:0 AC_SUBST(libtool_VERSION) # Find the rest of the source tree framework. AM_ENABLE_MULTILIB(, ..) # Gets build, host, target, *_vendor, *_cpu, *_os, etc. # # You will slowly go insane if you do not grok the following fact: when # building v3 as part of the compiler, the top-level /target/ becomes the # library's /host/. configure then causes --target to default to --host, # exactly like any other package using autoconf. Therefore, 'target' and # 'host' will always be the same. This makes sense both for native and # cross compilers, just think about it for a little while. :-) # # Also, if v3 is being configured as part of a cross compiler, the top-level # configure script will pass the "real" host as $with_cross_host. # # Do not delete or change the following two lines. For why, see # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html AC_CANONICAL_SYSTEM target_alias=${target_alias-$host_alias} # Handy for debugging: #AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5 if test "$build" != "$host"; then # We are being configured with some form of cross compiler. GLIBCXX_IS_NATIVE=false case "$host","$target" in # Darwin crosses can use the host system's libraries and headers, # because of the fat library support. Of course, it must be the # same version of Darwin on both sides. Allow the user to # just say --target=foo-darwin without a version number to mean # "the version on this system". *-*-darwin*,*-*-darwin*) hostos=`echo $host | sed 's/.*-darwin/darwin/'` targetos=`echo $target | sed 's/.*-darwin/darwin/'` if test $hostos = $targetos -o $targetos = darwin ; then GLIBCXX_IS_NATIVE=true fi ;; *) GCC_NO_EXECUTABLES ;; esac else GLIBCXX_IS_NATIVE=true fi # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. # 1.x: minimum required version # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch # of other PACKAGE_* variables will, however, and there's nothing # we can do about that; they come from AC_INIT). # foreign: we don't follow the normal rules for GNU packages (no COPYING # file in the top srcdir, etc, etc), so stop complaining. # no-dependencies: turns off auto dependency generation (just for now) # -Wall: turns on all automake warnings... # -Wno-portability: ...except this one, since GNU make is now required. AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies -Wall -Wno-portability -Wno-override]) AH_TEMPLATE(PACKAGE, [Name of package]) AH_TEMPLATE(VERSION, [Version number of package]) # Runs configure.host, finds CC, CXX, and assorted other critical bits. Sets # up critical shell variables. GLIBCXX_CONFIGURE AC_LIBTOOL_DLOPEN AM_PROG_LIBTOOL AC_SUBST(enable_shared) AC_SUBST(enable_static) # Possibly disable most of the library. ## TODO: Consider skipping unncessary tests altogether in this case, rather ## than just ignoring the results. Faster /and/ more correct, win win. GLIBCXX_ENABLE_HOSTED # Check for compiler support that doesn't require linking. GLIBCXX_ENABLE_SJLJ_EXCEPTIONS GLIBCXX_ENABLE_PCH($is_hosted) # Enable all the variable C++ runtime options. GLIBCXX_ENABLE_CSTDIO GLIBCXX_ENABLE_CLOCALE GLIBCXX_ENABLE_ALLOCATOR GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host GLIBCXX_ENABLE_LONG_LONG([yes]) GLIBCXX_ENABLE_WCHAR_T([yes]) GLIBCXX_ENABLE_C99([yes]) GLIBCXX_ENABLE_CONCEPT_CHECKS([no]) GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"]) GLIBCXX_ENABLE_DEBUG([no]) GLIBCXX_ENABLE_CXX_FLAGS GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no]) # No surprises, no surprises... GLIBCXX_ENABLE_THREADS GLIBCXX_ENABLE_ATOMIC_BUILTINS if test $atomicity_dir = cpu/generic/atomic_mutex ; then AC_MSG_WARN([No native atomic operations are provided for this platform.]) if test $target_thread_file = single; then AC_MSG_WARN([They cannot be faked when thread support is disabled.]) AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) else AC_MSG_WARN([They will be faked using a mutex.]) AC_MSG_WARN([Performance of certain classes will degrade as a result.]) fi fi GLIBCXX_CHECK_COMPILER_FEATURES if $GLIBCXX_IS_NATIVE; then # We can do more elaborate tests that assume a working linker. CANADIAN=no # Check for available headers. AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \ machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h \ sys/types.h sys/ipc.h sys/sem.h]) GLIBCXX_CHECK_LINKER_FEATURES GLIBCXX_CHECK_MATH_SUPPORT GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT GLIBCXX_CHECK_ICONV_SUPPORT GLIBCXX_CHECK_STDLIB_SUPPORT # For showmanyc_helper(). AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h) GLIBCXX_CHECK_POLL GLIBCXX_CHECK_S_ISREG_OR_S_IFREG # For xsputn_2(). AC_CHECK_HEADERS(sys/uio.h) GLIBCXX_CHECK_WRITEV # For the __streamoff_base_type typedef. GLIBCXX_CHECK_INT64_T # For LFS support. GLIBCXX_CHECK_LFS # For C99 support to TR1. GLIBCXX_CHECK_C99_TR1 # For dev/random and dev/urandom for TR1. GLIBCXX_CHECK_RANDOM_TR1 # For TLS support. GCC_CHECK_TLS # For _Unwind_GetIPInfo. GCC_CHECK_UNWIND_GETIPINFO AC_LC_MESSAGES AC_TRY_COMPILE( [#include ], [sigjmp_buf env; while (! sigsetjmp (env, 1)) siglongjmp (env, 1); ], [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])]) AC_FUNC_MMAP else # This lets us hard-code the functionality we know we'll have in the cross # target environment. "Let" is a sugar-coated word placed on an especially # dull and tedious hack, actually. # # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros # that involve linking, can't be used: # "cannot open sim-crt0.o" # "cannot open crt0.o" # etc. All this is because there currently exists no unified, consistent # way for top level CC information to be passed down to target directories: # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc. # When all of that is done, all of this hokey, excessive AC_DEFINE junk for # crosses can be removed. # If Canadian cross, then don't pick up tools from the build directory. # Used only in GLIBCXX_EXPORT_INCLUDES. if test -n "$with_cross_host" && test x"$build_alias" != x"$with_cross_host" && test x"$build" != x"$target"; then CANADIAN=yes else CANADIAN=no fi # Construct crosses by hand, eliminating bits that need ld... # GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT # GLIBCXX_CHECK_MATH_SUPPORT # First, test for "known" system libraries. We may be using newlib even # on a hosted environment. if test "x${with_newlib}" = "xyes"; then os_include_dir="os/newlib" AC_DEFINE(HAVE_HYPOT) # GLIBCXX_CHECK_STDLIB_SUPPORT AC_DEFINE(HAVE_STRTOF) # AC_FUNC_MMAP AC_DEFINE(HAVE_MMAP) AC_DEFINE(HAVE_ACOSF) AC_DEFINE(HAVE_ASINF) AC_DEFINE(HAVE_ATAN2F) AC_DEFINE(HAVE_ATANF) AC_DEFINE(HAVE_CEILF) AC_DEFINE(HAVE_COPYSIGN) AC_DEFINE(HAVE_COPYSIGNF) AC_DEFINE(HAVE_COSF) AC_DEFINE(HAVE_COSHF) AC_DEFINE(HAVE_EXPF) AC_DEFINE(HAVE_FABSF) AC_DEFINE(HAVE_FLOORF) AC_DEFINE(HAVE_FMODF) AC_DEFINE(HAVE_FREXPF) AC_DEFINE(HAVE_LDEXPF) AC_DEFINE(HAVE_LOG10F) AC_DEFINE(HAVE_LOGF) AC_DEFINE(HAVE_MODFF) AC_DEFINE(HAVE_POWF) AC_DEFINE(HAVE_SINF) AC_DEFINE(HAVE_SINHF) AC_DEFINE(HAVE_SQRTF) AC_DEFINE(HAVE_TANF) AC_DEFINE(HAVE_TANHF) AC_DEFINE(HAVE_S_ISREG) AC_DEFINE(HAVE_S_IFREG) else GLIBCXX_CROSSCONFIG fi # At some point, we should differentiate between architectures # like x86, which have long double versions, and alpha/powerpc/etc., # which don't. For the time being, punt. if test x"long_double_math_on_this_cpu" = x"yes"; then AC_DEFINE(HAVE_ACOSL) AC_DEFINE(HAVE_ASINL) AC_DEFINE(HAVE_ATAN2L) AC_DEFINE(HAVE_ATANL) AC_DEFINE(HAVE_CEILL) AC_DEFINE(HAVE_COPYSIGNL) AC_DEFINE(HAVE_COSL) AC_DEFINE(HAVE_COSHL) AC_DEFINE(HAVE_EXPL) AC_DEFINE(HAVE_FABSL) AC_DEFINE(HAVE_FLOORL) AC_DEFINE(HAVE_FMODL) AC_DEFINE(HAVE_FREXPL) AC_DEFINE(HAVE_LDEXPL) AC_DEFINE(HAVE_LOG10L) AC_DEFINE(HAVE_LOGL) AC_DEFINE(HAVE_MODFL) AC_DEFINE(HAVE_POWL) AC_DEFINE(HAVE_SINCOSL) AC_DEFINE(HAVE_SINL) AC_DEFINE(HAVE_SINHL) AC_DEFINE(HAVE_SQRTL) AC_DEFINE(HAVE_TANL) AC_DEFINE(HAVE_TANHL) fi # Assume we have _Unwind_GetIPInfo for cross-compiles. AC_DEFINE(HAVE_GETIPINFO) fi # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. GLIBCXX_ENABLE_SYMVERS([yes]) GLIBCXX_ENABLE_VISIBILITY([yes]) ac_ldbl_compat=no case "$target" in powerpc*-*-*gnu* | \ sparc*-*-linux* | \ s390*-*-linux* | \ alpha*-*-linux*) AC_TRY_COMPILE(, [ #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__)) #error no need for long double compatibility #endif ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no]) if test "$ac_ldbl_compat" = yes; then AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1, [Define if compatibility should be provided for -mlong-double-64.]) port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver" fi esac GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes) # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE. GLIBCXX_CONFIGURE_TESTSUITE # Propagate the target-specific source directories through the build chain. ATOMICITY_SRCDIR=config/${atomicity_dir} ATOMIC_WORD_SRCDIR=config/${atomic_word_dir} CPU_DEFINES_SRCDIR=config/${cpu_defines_dir} OS_INC_SRCDIR=config/${os_include_dir} ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir} AC_SUBST(ATOMICITY_SRCDIR) AC_SUBST(ATOMIC_WORD_SRCDIR) AC_SUBST(CPU_DEFINES_SRCDIR) AC_SUBST(ABI_TWEAKS_SRCDIR) AC_SUBST(OS_INC_SRCDIR) # Determine cross-compile flags and AM_CONDITIONALs. #AC_SUBST(GLIBCXX_IS_NATIVE) #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes) # from GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT: #AM_CONDITIONAL(GLIBCXX_BUILD_LIBMATH, test $need_libmath = yes) GLIBCXX_EVALUATE_CONDITIONALS AC_CACHE_SAVE if test ${multilib} = yes; then multilib_arg="--enable-multilib" else multilib_arg= fi # Export all the install information. GLIBCXX_EXPORT_INSTALL_INFO # Export all the include and flag information to Makefiles. GLIBCXX_EXPORT_INCLUDES GLIBCXX_EXPORT_FLAGS if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features | grep "enable shared" > /dev/null; then LIBSUPCXX_PICFLAGS=-prefer-pic else LIBSUPCXX_PICFLAGS= fi AC_SUBST(LIBSUPCXX_PICFLAGS) dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros, dnl which can all be called multiple times as needed, plus one (different) dnl AC_OUTPUT macro. This one lists the files to be created: AC_CONFIG_FILES( \ Makefile \ AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]) ) AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags]) dnl These commands are run at the end of config.status: AC_CONFIG_COMMANDS([default], [if test -n "$CONFIG_FILES"; then # Multilibs need MULTISUBDIR defined correctly in certain makefiles so # that multilib installs will end up installed in the correct place. # The testsuite needs it for multilib-aware ABI baseline files. # To work around this not being passed down from config-ml.in -> # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually # append it here. Only modify Makefiles that have just been created. # # Also, get rid of this simulated-VPATH thing that automake does. cat > vpsed << \_EOF s!`test -f '$<' || echo '$(srcdir)/'`!! _EOF for i in $SUBDIRS; do case $CONFIG_FILES in *${i}/Makefile*) #echo "Adding MULTISUBDIR to $i/Makefile" sed -f vpsed $i/Makefile > tmp grep '^MULTISUBDIR =' Makefile >> tmp mv tmp $i/Makefile ;; esac done rm vpsed fi (cd include && ${MAKE-make}) ], [ # Variables needed in config.status (file generation) which aren't already # passed by autoconf. SUBDIRS="$SUBDIRS" ]) dnl And this actually makes things happen: AC_OUTPUT