X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fconfigure.ac;h=2f571e6482d50de400f1d1d7c264a3d623861d0d;hb=993c17152a79499f1dcb8f0865f7f7a97755faee;hp=665863f0f1cdee9e2fcddb2778b0dfb571b84081;hpb=57601f80f566348eb084d3d135652273a60d7f64;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/configure.ac b/gcc/configure.ac index 665863f0f1c..2f571e6482d 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -2,7 +2,7 @@ # Process this file with autoconf to generate a configuration script. # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, -# 2007, 2008, 2009 Free Software Foundation, Inc. +# 2007, 2008, 2009, 2010 Free Software Foundation, Inc. #This file is part of GCC. @@ -785,6 +785,14 @@ AC_SUBST(TARGET_SYSTEM_ROOT) AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE) AC_SUBST(CROSS_SYSTEM_HEADER_DIR) +AC_ARG_WITH(specs, + [AS_HELP_STRING([--with-specs=SPECS], + [add SPECS to driver command-line processing])], + [CONFIGURE_SPECS=$withval], + [CONFIGURE_SPECS=] +) +AC_SUBST(CONFIGURE_SPECS) + # Build with intermodule optimisations AC_ARG_ENABLE(intermodule, [ --enable-intermodule build the compiler in one step], @@ -1016,6 +1024,22 @@ AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \ gettimeofday mbstowcs wcswidth mmap mincore setlocale \ gcc_UNLOCKED_FUNCS) +save_CPPFLAGS="$CPPFLAGS" +save_LIBS="$LIBS" +LIBS="$LIBS $LIBELFLIBS" +AC_CHECK_FUNCS(elf_getshdrstrndx,, + [AC_CHECK_FUNCS(elf_getshstrndx, + [AC_RUN_IFELSE([AC_LANG_SOURCE([[#include +#include +int main() +{ + return elf_getshstrndx (NULL, 0) == 0; +}]])], AC_DEFINE(HAVE_ELF_GETSHSTRNDX_GABI, 1, + [Define if elf_getshstrndx has gABI conformant return values.]))])] + ) +LIBS="$save_LIBS" +CPPFLAGS="$save_CPPFLAGS" + if test x$ac_cv_func_mbstowcs = xyes; then AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works, [ AC_RUN_IFELSE([AC_LANG_SOURCE([[#include @@ -1926,6 +1950,17 @@ AC_ARG_WITH(plugin-ld, 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 @@ -2111,24 +2146,53 @@ gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden, [ .hidden foobar foobar:]) +changequote(,)dnl +if test $in_tree_ld != yes ; then + ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q` + if test x"$ld_is_gold" = xyes; then + gcc_cv_ld_hidden=yes + elif echo "$ld_ver" | grep GNU > /dev/null; then + ld_vers=`echo $ld_ver | sed -n \ + -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'` + ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'` + ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'` + ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'` + ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'` + else + case "${target}" in + *-*-solaris2*) + # + # Solaris 2 ld -V output looks like this for a regular version: + # + # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699 + # + # but test versions add stuff at the end: + # + # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10 + # + ld_ver=`$gcc_cv_ld -V 2>&1` + if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then + ld_vers=`echo $ld_ver | sed -n \ + -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'` + ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'` + ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'` + fi + ;; + esac + fi +fi +changequote([,])dnl + AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden, -[if test $in_tree_ld = yes ; then +[[if test $in_tree_ld = yes ; then gcc_cv_ld_hidden=no if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \ && test $in_tree_ld_is_elf = yes; then gcc_cv_ld_hidden=yes fi else -changequote(,)dnl gcc_cv_ld_hidden=yes - ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q` if echo "$ld_ver" | grep GNU > /dev/null; then - ld_vers=`echo $ld_ver | sed -n \ - -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'` - ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'` - ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'` - ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'` - ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'` if test 0"$ld_date" -lt 20020404; then if test -n "$ld_date"; then # If there was date string, but was earlier than 2002-04-04, fail @@ -2160,8 +2224,7 @@ changequote(,)dnl ;; esac fi -changequote([,])dnl -fi]) +fi]]) libgcc_visibility=no AC_SUBST(libgcc_visibility) GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN]) @@ -2219,24 +2282,22 @@ L1: .uleb128 1280 .sleb128 -1010 L2:], - [# GAS versions before 2.11 do not support uleb128, +[[# GAS versions before 2.11 do not support uleb128, # despite appearing to. # ??? There exists an elf-specific test that will crash # the assembler. Perhaps it's better to figure out whether # arbitrary sections are supported and try the test. as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q` if echo "$as_ver" | grep GNU > /dev/null; then -changequote(,)dnl as_vers=`echo $as_ver | sed -n \ -e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'` as_major=`expr "$as_vers" : '\([0-9]*\)'` as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'` -changequote([,])dnl if test $as_major -eq 2 && test $as_minor -lt 11 then : else gcc_cv_as_leb128=yes fi - fi], + fi]], [AC_DEFINE(HAVE_AS_LEB128, 1, [Define if your assembler supports .sleb128 and .uleb128.])]) @@ -2261,7 +2322,23 @@ gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive, sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then gcc_cv_as_cfi_directive=no else - gcc_cv_as_cfi_directive=yes + case "$target" in + i?86-*-solaris2.1[[0-9]]*) + # On Solaris/x86, make sure that GCC and gas agree on using + # read-only .eh_frame sections for 64-bit. + if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \ + $gcc_cv_objdump -h conftest.o 2>/dev/null | \ + sed -e /.eh_frame/!d -e N | \ + grep READONLY > /dev/null; then + gcc_cv_as_cfi_directive=yes + else + gcc_cv_as_cfi_directive=no + fi + ;; + *) + gcc_cv_as_cfi_directive=yes + ;; + esac fi else # no objdump, err on the side of caution @@ -2281,17 +2358,15 @@ gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working, [ .text .cfi_startproc .cfi_adjust_cfa_offset 64 - .skip 512, 0 + .skip 75040, 0 .cfi_adjust_cfa_offset 128 .cfi_endproc], -[ -changequote(,)dnl +[[ if $gcc_cv_readelf -wf conftest.o 2>/dev/null \ - | grep 'DW_CFA_advance_loc[12]:[ ][ ]*512[ ]' >/dev/null; then + | grep 'DW_CFA_advance_loc[24]:[ ][ ]*75040[ ]' >/dev/null; then gcc_cv_as_cfi_advance_working=yes fi -changequote([,])dnl -]) +]]) else # no readelf, err on the side of caution gcc_cv_as_cfi_advance_working=no @@ -2416,13 +2491,15 @@ else [elf,2,16,0], [--fatal-warnings], [.section .text,"axG",%progbits,.foo,comdat]) fi -if test $in_tree_ld = yes ; then +if test x"$ld_is_gold" = xyes; then + comdat_group=yes +elif test $in_tree_ld = yes ; then comdat_group=no if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \ && test $in_tree_ld_is_elf = yes; then comdat_group=yes fi -elif test x"$ld_vers" != x; then +elif echo "$ld_ver" | grep GNU > /dev/null; then comdat_group=yes if test 0"$ld_date" -lt 20050308; then if test -n "$ld_date"; then @@ -2435,9 +2512,32 @@ elif test x"$ld_vers" != x; then fi fi else - # assume linkers other than GNU ld don't support COMDAT group - comdat_group=no +changequote(,)dnl + case "${target}" in + *-*-solaris2.1[1-9]*) + # Sun ld has COMDAT group support since Solaris 9, but it doesn't + # interoperate with GNU as until Solaris 11 build 130, i.e. ld + # version 1.688. + # + # FIXME: Maybe need to refine later when COMDAT group support with + # Sun as is implemented. + if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 1688; then + comdat_group=yes + else + comdat_group=no + fi + ;; + *) + # Assume linkers other than GNU ld don't support COMDAT group. + comdat_group=no + ;; + esac +changequote([,])dnl fi +# Allow overriding the automatic COMDAT group tests above. +AC_ARG_ENABLE(comdat, + [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])], + [comdat_group="$enable_comdat"]) if test $comdat_group = no; then gcc_cv_as_comdat_group=no gcc_cv_as_comdat_group_percent=no @@ -2548,25 +2648,54 @@ foo: .long 25 tls_first_minor=17 ;; i[34567]86-*-*) - conftest_s=' - .section ".tdata","awT",@progbits + case "$target" in + i[34567]86-*-solaris2.[89]*) + # TLS was introduced in the Solaris 9 4/04 release but + # we do not enable it by default on Solaris 9 either. + if test "x$enable_tls" = xyes ; then + on_solaris=yes + else + enable_tls=no; + fi + ;; + i[34567]86-*-solaris2.*) + on_solaris=yes + ;; + *) + on_solaris=no + ;; + esac + if test x$on_solaris = xyes && test x$gas_flag = xno; then + conftest_s=' + .section .tdata,"awt",@progbits' + tls_first_major=0 + tls_first_minor=0 +changequote([,])dnl + AC_DEFINE(TLS_SECTION_ASM_FLAG, 't', +[Define to the flag used to mark TLS sections if the default (`T') doesn't work.]) +changequote(,)dnl + else + conftest_s=' + .section ".tdata","awT",@progbits' + tls_first_major=2 + tls_first_minor=14 + tls_as_opt="--fatal-warnings" + fi + conftest_s="$conftest_s foo: .long 25 .text movl %gs:0, %eax - leal foo@TLSGD(,%ebx,1), %eax - leal foo@TLSLDM(%ebx), %eax - leal foo@DTPOFF(%eax), %edx - movl foo@GOTTPOFF(%ebx), %eax - subl foo@GOTTPOFF(%ebx), %eax - addl foo@GOTNTPOFF(%ebx), %eax - movl foo@INDNTPOFF, %eax - movl $foo@TPOFF, %eax - subl $foo@TPOFF, %eax - leal foo@NTPOFF(%ecx), %eax' - tls_first_major=2 - tls_first_minor=14 - tls_as_opt=--fatal-warnings - ;; + leal foo@tlsgd(,%ebx,1), %eax + leal foo@tlsldm(%ebx), %eax + leal foo@dtpoff(%eax), %edx + movl foo@gottpoff(%ebx), %eax + subl foo@gottpoff(%ebx), %eax + addl foo@gotntpoff(%ebx), %eax + movl foo@indntpoff, %eax + movl \$foo@tpoff, %eax + subl \$foo@tpoff, %eax + leal foo@ntpoff(%ecx), %eax" + ;; x86_64-*-*) conftest_s=' .section ".tdata","awT",@progbits @@ -2746,7 +2875,7 @@ foo: .long 25 ;; sparc*-*-*) case "$target" in - sparc*-sun-solaris2.[56789]*) + sparc*-sun-solaris2.[89]*) # TLS was introduced in the Solaris 9 4/04 release but # we do not enable it by default on Solaris 9 either. if test "x$enable_tls" = xyes ; then @@ -2935,6 +3064,35 @@ case "$target" in [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1, [Define if your assembler supports -relax option.])]) + gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs], + gcc_cv_as_sparc_gotdata_op,, + [-K PIC], +[.text +foo: + nop +bar: + sethi %gdop_hix22(foo), %g1 + xor %g1, %gdop_lox10(foo), %g1 + ld [[%l7 + %g1]], %g2, %gdop(foo)], + [if test x$gcc_cv_ld != x \ + && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then + if $gcc_cv_ld -v | grep GNU >/dev/null 2>&1; then + if test x$gcc_cv_objdump != x; then + if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \ + | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then + gcc_cv_as_sparc_gotdata_op=no + else + gcc_cv_as_sparc_gotdata_op=yes + fi + fi + else + gcc_cv_as_sparc_gotdata_op=yes + fi + fi + rm -f conftest], + [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1, + [Define if your assembler and linker support GOTDATA_OP relocs.])]) + gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs], gcc_cv_as_sparc_ua_pcrel,, [-K PIC], @@ -3311,6 +3469,21 @@ LCF0: [ bl __tls_get_addr(x@tlsgd)],, [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1, [Define if your assembler supports arg info for __tls_get_addr.])]) + + case $target in + *-*-aix*) + gcc_GAS_CHECK_FEATURE([.ref support], + gcc_cv_as_aix_ref, [2.21.0],, + [ .csect stuff[[rw]] + stuff: + .long 1 + .extern sym + .ref sym + ],, + [AC_DEFINE(HAVE_AS_REF, 1, + [Define if your assembler supports .ref])]) + ;; + esac ;; mips*-*-*) @@ -3536,15 +3709,15 @@ Valid choices are 'yes' and 'no'.]) ;; [elf,2,19,52],, [.type foo, @gnu_unique_object],, # Also check for ld.so support, i.e. glibc 2.11 or higher. - [if test x$host = x$build -a x$host = x$target && - glibcver=`ldd --version 2>/dev/null`; then - glibcmajor=`expr "$glibcver" : "ldd (GNU libc) \([[0-9]]*\)"` - glibcminor=`expr "$glibcver" : "ldd (GNU libc) [[0-9]]*\.\([[0-9]]*\)"` + [[if test x$host = x$build -a x$host = x$target && + glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then + glibcmajor=`expr "$glibcver" : "\([0-9]*\)"` + glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"` glibcnum=`expr $glibcmajor \* 1000 + $glibcminor` if test "$glibcnum" -ge 2011 ; then enable_gnu_unique_object=yes fi - fi])]) + fi]])]) if test x$enable_gnu_unique_object = xyes; then AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1, [Define if your assembler supports @gnu_unique_object.]) @@ -3823,7 +3996,9 @@ AC_CACHE_CHECK(__stack_chk_fail in target C library, case "$target" in *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu) if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then - if test "x$with_sysroot" = x; then + if test "x$with_headers" != x; then + glibc_header_dir=$with_headers + elif test "x$with_sysroot" = x; then glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include" elif test "x$with_build_sysroot" != "x"; then glibc_header_dir="${with_build_sysroot}/usr/include" @@ -3835,27 +4010,27 @@ AC_CACHE_CHECK(__stack_chk_fail in target C library, else glibc_header_dir=/usr/include fi - # glibc 2.4 and later provides __stack_chk_fail and + [# glibc 2.4 and later provides __stack_chk_fail and # either __stack_chk_guard, or TLS access to stack guard canary. if test -f $glibc_header_dir/features.h \ - && $EGREP '^@<:@ @:>@*#[ ]*define[ ]+__GNU_LIBRARY__[ ]+([1-9][0-9]|[6-9])' \ + && $EGREP '^[ ]*#[ ]*define[ ]+__GNU_LIBRARY__[ ]+([1-9][0-9]|[6-9])' \ $glibc_header_dir/features.h > /dev/null; then - if $EGREP '^@<:@ @:>@*#[ ]*define[ ]+__GLIBC__[ ]+([1-9][0-9]|[3-9])' \ + if $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+([1-9][0-9]|[3-9])' \ $glibc_header_dir/features.h > /dev/null; then gcc_cv_libc_provides_ssp=yes - elif $EGREP '^@<:@ @:>@*#[ ]*define[ ]+__GLIBC__[ ]+2' \ + elif $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC__[ ]+2' \ $glibc_header_dir/features.h > /dev/null \ - && $EGREP '^@<:@ @:>@*#[ ]*define[ ]+__GLIBC_MINOR__[ ]+([1-9][0-9]|[4-9])' \ + && $EGREP '^[ ]*#[ ]*define[ ]+__GLIBC_MINOR__[ ]+([1-9][0-9]|[4-9])' \ $glibc_header_dir/features.h > /dev/null; then gcc_cv_libc_provides_ssp=yes - elif $EGREP '^@<:@ @:>@*#[ ]*define[ ]+__UCLIBC__[ ]+1' \ + elif $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC__[ ]+1' \ $glibc_header_dir/features.h > /dev/null && \ test -f $glibc_header_dir/bits/uClibc_config.h && \ - $EGREP '^@<:@ @:>@*#[ ]*define[ ]+__UCLIBC_HAS_SSP__[ ]+1' \ + $EGREP '^[ ]*#[ ]*define[ ]+__UCLIBC_HAS_SSP__[ ]+1' \ $glibc_header_dir/bits/uClibc_config.h > /dev/null; then gcc_cv_libc_provides_ssp=yes fi - fi + fi] ;; *-*-gnu*) # Avoid complicated tests (see @@ -3887,7 +4062,7 @@ case "$target" in AC_ARG_WITH(long-double-128, [ --with-long-double-128 Use 128-bit long double by default.], gcc_cv_target_ldbl128="$with_long_double_128", - [gcc_cv_target_ldbl128=no + [[gcc_cv_target_ldbl128=no if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then if test "x$with_sysroot" = x; then glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include" @@ -3901,12 +4076,10 @@ case "$target" in else glibc_header_dir=/usr/include fi -changequote(,)dnl grep '^[ ]*#[ ]*define[ ][ ]*__LONG_DOUBLE_MATH_OPTIONAL' \ $glibc_header_dir/bits/wordsize.h > /dev/null 2>&1 \ && gcc_cv_target_ldbl128=yes -changequote([,])dnl - ]) + ]]) ;; esac if test x$gcc_cv_target_ldbl128 = xyes; then @@ -4119,8 +4292,8 @@ done rm -f Make-hooks touch Make-hooks target_list="all.cross start.encap rest.encap tags \ - install-common install-man install-info install-pdf dvi pdf \ - html uninstall info man srcextra srcman srcinfo \ + install-common install-man install-info install-pdf install-html dvi \ + pdf html uninstall info man srcextra srcman srcinfo \ mostlyclean clean distclean maintainer-clean install-plugin" for t in $target_list @@ -4282,30 +4455,35 @@ enable_plugin=yes; default_plugin=yes) pluginlibs= if test x"$enable_plugin" = x"yes"; then - # Check that the host supports -rdynamic and -ldl - have_rdynamic=no - have_dl=no - saved_LDFLAGS="$LDFLAGS" - saved_LIBS="$LIBS" - LIBS= - - # Check -rdynamic - LDFLAGS="$LDFLAGS -rdynamic" - AC_MSG_CHECKING([for -rdynamic]) - AC_TRY_LINK([],[return 0;], - [AC_MSG_RESULT([yes]); have_rdynamic=yes], - [AC_MSG_RESULT([no])]) - if test x"$have_rdynamic" = x"yes" ; then - pluginlibs="-rdynamic" + + AC_MSG_CHECKING([for exported symbols]) + echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c + ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1 + if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then + : # No need to use a flag + else + AC_MSG_CHECKING([for -rdynamic]) + ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1 + if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then + plugin_rdynamic=yes + pluginlibs="-rdynamic" + else + plugin_rdynamic=no + enable_plugin=no + fi + AC_MSG_RESULT([$plugin_rdynamic]) fi # Check -ldl + saved_LIBS="$LIBS" AC_SEARCH_LIBS([dlopen], [dl]) if test x"$ac_cv_search_dlopen" = x"-ldl"; then pluginlibs="$pluginlibs -ldl" fi + LIBS="$saved_LIBS" # Check that we can build shared objects with -fPIC -shared + saved_LDFLAGS="$LDFLAGS" LDFLAGS="$LDFLAGS -fPIC -shared" AC_MSG_CHECKING([for -fPIC -shared]) AC_TRY_LINK( @@ -4316,6 +4494,7 @@ if test x"$enable_plugin" = x"yes"; then pluginlibs= enable_plugin=no fi + LDFLAGS="$saved_LDFLAGS" # If plugin support had been requested but not available, fail. if test x"$enable_plugin" = x"no" ; then @@ -4325,9 +4504,6 @@ Building GCC with plugin support requires a host that supports -fPIC, -shared, -ldl and -rdynamic.]) fi fi - - LDFLAGS="$saved_LDFLAGS" - LIBS="$saved_LIBS" fi AC_SUBST(pluginlibs)