# configure.ac for GCC # Process this file with autoconf to generate a configuration script. # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, # 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. #This file is part of GCC. #GCC is free software; you can redistribute it and/or modify it under #the terms of the GNU General Public License as published by the Free #Software Foundation; either version 3, or (at your option) any later #version. #GCC is distributed in the hope that it will be useful, but WITHOUT #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or #FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License #for more details. #You should have received a copy of the GNU General Public License #along with GCC; see the file COPYING3. If not see #. # -------------------------------- # Initialization and sanity checks # -------------------------------- AC_PREREQ(2.64) AC_INIT AC_CONFIG_SRCDIR(tree.c) AC_CONFIG_HEADER(auto-host.h:config.in) gcc_version=`cat $srcdir/BASE-VER` # Determine the host, build, and target systems AC_CANONICAL_BUILD AC_CANONICAL_HOST AC_CANONICAL_TARGET # Determine the noncanonical target name, for directory use. ACX_NONCANONICAL_TARGET # Determine the target- and build-specific subdirectories GCC_TOPLEV_SUBDIRS # Set program_transform_name AC_ARG_PROGRAM # Check for bogus environment variables. # Test if LIBRARY_PATH contains the notation for the current directory # since this would lead to problems installing/building glibc. # LIBRARY_PATH contains the current directory if one of the following # is true: # - one of the terminals (":" and ";") is the first or last sign # - two terminals occur directly after each other # - the path contains an element with a dot in it AC_MSG_CHECKING(LIBRARY_PATH variable) changequote(,)dnl case ${LIBRARY_PATH} in [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* ) library_path_setting="contains current directory" ;; *) library_path_setting="ok" ;; esac changequote([,])dnl AC_MSG_RESULT($library_path_setting) if test "$library_path_setting" != "ok"; then AC_MSG_ERROR([ *** LIBRARY_PATH shouldn't contain the current directory when *** building gcc. 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*) AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes], [echo "__cxa_atexit can't be enabled on this target"]) ;; esac else # We can't check for __cxa_atexit when building a cross, so assume # it is available use_cxa_atexit=yes fi if test x$use_cxa_atexit = xyes; then AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2, [Define if you want to use __cxa_atexit, rather than atexit, to register C++ destructors for local statics and global objects. This is essential for fully standards-compliant handling of destructors, but requires __cxa_atexit in libc.]) fi fi # Look for a file containing extra machine modes. if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then extra_modes_file='$(srcdir)'/config/${extra_modes} AC_SUBST(extra_modes_file) AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes", [Define to the name of a file containing a list of extra machine modes for this architecture.]) fi # Convert extra_options into a form suitable for Makefile use. extra_opt_files= all_opt_files= for f in $extra_options; do extra_opt_files="$extra_opt_files \$(srcdir)/config/$f" all_opt_files="$all_opt_files $srcdir/config/$f" done AC_SUBST(extra_opt_files) # auto-host.h is the file containing items generated by autoconf and is # the first file included by config.h. # If host=build, it is correct to have bconfig include auto-host.h # as well. If host!=build, we are in error and need to do more # work to find out the build config parameters. if test x$host = x$build then build_auto=auto-host.h else # We create a subdir, then run autoconf in the subdir. # To prevent recursion we set host and build for the new # invocation of configure to the build for this invocation # of configure. tempdir=build.$$ rm -rf $tempdir mkdir $tempdir cd $tempdir case ${srcdir} in /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};; *) realsrcdir=../${srcdir};; esac saved_CFLAGS="${CFLAGS}" CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \ LDFLAGS="${LDFLAGS_FOR_BUILD}" \ ${realsrcdir}/configure \ --enable-languages=${enable_languages-all} \ --target=$target_alias --host=$build_alias --build=$build_alias CFLAGS="${saved_CFLAGS}" # We just finished tests for the build machine, so rename # the file auto-build.h in the gcc directory. mv auto-host.h ../auto-build.h cd .. rm -rf $tempdir build_auto=auto-build.h fi AC_SUBST(build_subdir) tm_file="${tm_file} defaults.h" tm_p_file="${tm_p_file} tm-preds.h" host_xm_file="auto-host.h ansidecl.h ${host_xm_file}" build_xm_file="${build_auto} ansidecl.h ${build_xm_file}" # We don't want ansidecl.h in target files, write code there in ISO/GNU C. # put this back in temporarily. xm_file="auto-host.h ansidecl.h ${xm_file}" # -------- # UNSORTED # -------- changequote(,)dnl # Compile in configure arguments. if test -f configargs.h ; then # Being re-configured. gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'` gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS" else gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS" fi # Double all backslashes and backslash all quotes to turn # gcc_config_arguments into a C string. sed -e 's/\\/\\\\/g; s/"/\\"/g' <conftest.out $gcc_config_arguments EOF gcc_config_arguments_str=`cat conftest.out` rm -f conftest.out cat > configargs.h < plugin-version.h <target assembler and hope that it will have the same features # as the host->target assembler we'll be using. gcc_cv_gas_major_version= gcc_cv_gas_minor_version= gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas m4_pattern_allow([AS_FOR_TARGET])dnl AS_VAR_SET_IF(gcc_cv_as,, [ if test -x "$DEFAULT_ASSEMBLER"; then gcc_cv_as="$DEFAULT_ASSEMBLER" elif test -f $gcc_cv_as_gas_srcdir/configure.in \ && test -f ../gas/Makefile \ && test x$build = x$host; then gcc_cv_as=../gas/as-new$build_exeext elif test -x as$build_exeext; then # Build using assembler in the current directory. gcc_cv_as=./as$build_exeext elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then gcc_cv_as="$AS_FOR_TARGET" else AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET) fi]) ORIGINAL_AS_FOR_TARGET=$gcc_cv_as AC_SUBST(ORIGINAL_AS_FOR_TARGET) case "$ORIGINAL_AS_FOR_TARGET" in ./as | ./as$build_exeext) ;; *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;; esac AC_MSG_CHECKING(what assembler to use) if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then # Single tree build which includes gas. We want to prefer it # over whatever linker top-level may have detected, since # we'll use what we're building after installation anyway. AC_MSG_RESULT(newly built gas) in_tree_gas=yes _gcc_COMPUTE_GAS_VERSION in_tree_gas_is_elf=no if grep 'obj_format = elf' ../gas/Makefile > /dev/null \ || (grep 'obj_format = multi' ../gas/Makefile \ && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null then in_tree_gas_is_elf=yes fi else AC_MSG_RESULT($gcc_cv_as) in_tree_gas=no fi # Identify the linker which will work hand-in-glove with the newly # built GCC, so that we can examine its features. This is the linker # which will be driven by the driver program. # # If build != host, and we aren't building gas in-tree, we identify a # build->target linker and hope that it will have the same features # as the host->target linker we'll be using. gcc_cv_gld_major_version= gcc_cv_gld_minor_version= gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd AS_VAR_SET_IF(gcc_cv_ld,, [ if test -x "$DEFAULT_LINKER"; then gcc_cv_ld="$DEFAULT_LINKER" elif test -f $gcc_cv_ld_gld_srcdir/configure.in \ && test -f ../ld/Makefile \ && test x$build = x$host; then gcc_cv_ld=../ld/ld-new$build_exeext elif test -x collect-ld$build_exeext; then # Build using linker in the current directory. gcc_cv_ld=./collect-ld$build_exeext elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then gcc_cv_ld="$LD_FOR_TARGET" else AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET) fi]) ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld PLUGIN_LD=`basename $gcc_cv_ld` AC_ARG_WITH(plugin-ld, [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])], [if test x"$withval" != x; then ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval" PLUGIN_LD="$withval" fi]) AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET) AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker]) # Check to see if we are using gold instead of ld AC_MSG_CHECKING(whether we are using gold) ld_is_gold=no if test x$gcc_cv_ld != x; then if $gcc_cv_ld --version 2>/dev/null | sed 1q \ | grep "GNU gold" > /dev/null; then ld_is_gold=yes fi fi AC_MSG_RESULT($ld_is_gold) ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld AC_SUBST(ORIGINAL_LD_FOR_TARGET) case "$ORIGINAL_LD_FOR_TARGET" in ./collect-ld | ./collect-ld$build_exeext) ;; *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;; esac AC_MSG_CHECKING(what linker to use) if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \ || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then # Single tree build which includes ld. We want to prefer it # over whatever linker top-level may have detected, since # we'll use what we're building after installation anyway. AC_MSG_RESULT(newly built ld) in_tree_ld=yes in_tree_ld_is_elf=no if (grep 'EMUL = .*elf' ../ld/Makefile \ || grep 'EMUL = .*linux' ../ld/Makefile \ || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then in_tree_ld_is_elf=yes elif test "$ld_is_gold" = yes; then in_tree_ld_is_elf=yes fi for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in do changequote(,)dnl gcc_cv_gld_version=`sed -n -e 's/^[ ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f` if test x$gcc_cv_gld_version != x; then break fi done gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"` gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"` changequote([,])dnl else AC_MSG_RESULT($gcc_cv_ld) in_tree_ld=no fi # Figure out what nm we will be using. gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils AS_VAR_SET_IF(gcc_cv_nm,, [ if test -f $gcc_cv_binutils_srcdir/configure.in \ && test -f ../binutils/Makefile \ && test x$build = x$host; then gcc_cv_nm=../binutils/nm-new$build_exeext elif test -x nm$build_exeext; then gcc_cv_nm=./nm$build_exeext elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then gcc_cv_nm="$NM_FOR_TARGET" else AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET) fi]) AC_MSG_CHECKING(what nm to use) if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then # Single tree build which includes binutils. AC_MSG_RESULT(newly built nm) in_tree_nm=yes else AC_MSG_RESULT($gcc_cv_nm) in_tree_nm=no fi ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm AC_SUBST(ORIGINAL_NM_FOR_TARGET) case "$ORIGINAL_NM_FOR_TARGET" in ./nm | ./nm$build_exeext) ;; *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;; esac # Figure out what objdump we will be using. AS_VAR_SET_IF(gcc_cv_objdump,, [ if test -f $gcc_cv_binutils_srcdir/configure.in \ && test -f ../binutils/Makefile \ && test x$build = x$host; then # Single tree build which includes binutils. gcc_cv_objdump=../binutils/objdump$build_exeext elif test -x objdump$build_exeext; then gcc_cv_objdump=./objdump$build_exeext elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then gcc_cv_objdump="$OBJDUMP_FOR_TARGET" else AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET) fi]) AC_MSG_CHECKING(what objdump to use) if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then # Single tree build which includes binutils. AC_MSG_RESULT(newly built objdump) elif test x$gcc_cv_objdump = x; then AC_MSG_RESULT(not found) else AC_MSG_RESULT($gcc_cv_objdump) fi # Figure out what readelf we will be using. AS_VAR_SET_IF(gcc_cv_readelf,, [ if test -f $gcc_cv_binutils_srcdir/configure.in \ && test -f ../binutils/Makefile \ && test x$build = x$host; then # Single tree build which includes binutils. gcc_cv_readelf=../binutils/readelf$build_exeext elif test -x readelf$build_exeext; then gcc_cv_readelf=./readelf$build_exeext else AC_PATH_PROG(gcc_cv_readelf, readelf) fi]) AC_MSG_CHECKING(what readelf to use) if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then # Single tree build which includes binutils. AC_MSG_RESULT(newly built readelf) elif test x$gcc_cv_readelf = x; then AC_MSG_RESULT(not found) else AC_MSG_RESULT($gcc_cv_readelf) fi # Figure out what assembler alignment features are present. gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align, [2,6,0],, [.balign 4 .p2align 2],, [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1, [Define if your assembler supports .balign and .p2align.])]) gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align, [2,8,0],, [.p2align 4,,7],, [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1, [Define if your assembler supports specifying the maximum number of bytes to skip when using the GAS .p2align command.])]) gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16, [2,8,0],, [.literal16],, [AC_DEFINE(HAVE_GAS_LITERAL16, 1, [Define if your assembler supports .literal16.])]) gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1, [elf,2,9,0],, [conftest_label1: .word 0 .subsection -1 conftest_label2: .word 0 .previous], [if test x$gcc_cv_nm != x; then $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1 $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2 if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1 then : else gcc_cv_as_subsection_m1=yes fi rm -f conftest.nm1 conftest.nm2 fi], [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1, [Define if your assembler supports .subsection and .subsection -1 starts emitting at the beginning of your section.])]) gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak, [2,2,0],, [ .weak foobar],, [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])]) gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref, [2,17,0],, [ .weakref foobar, barfnot],, [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])]) gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat, [2,15,91],, [ .SPACE $TEXT$ .NSUBSPA $CODE$,COMDAT],, [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])]) # .hidden needs to be supported in both the assembler and the linker, # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN. # This is irritatingly difficult to feature test for; we have to check the # date string after the version number. If we've got an in-tree # ld, we don't know its patchlevel version, so we set the baseline at 2.13 # to be safe. # The gcc_GAS_CHECK_FEATURE call just sets a cache variable. gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden, [elf,2,13,0],, [ .hidden foobar foobar:],[ # Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with # STV_HIDDEN, so disable .hidden support if so. case "${target}" in i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*) if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then cat > conftest.s <