int main()
{
return elf_getshstrndx (NULL, 0) == 0;
-}]]), AC_DEFINE(HAVE_ELF_GETSHSTRNDX_GABI, 1,
- [Define if elf_getshstrndx has gABI conformant return values.])])])]
+}]])], AC_DEFINE(HAVE_ELF_GETSHSTRNDX_GABI, 1,
+ [Define if elf_getshstrndx has gABI conformant return values.]))])]
)
LIBS="$save_LIBS"
CPPFLAGS="$save_CPPFLAGS"
[ --enable-secureplt enable -msecure-plt by default for PowerPC],
[], [])
+AC_ARG_ENABLE(leading-mingw64-underscores,
+ AS_HELP_STRING([--enable-leading-mingw64-underscores],
+ [Enable leading underscores on 64 bit mingw targets]),
+ [],[])
+AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
+ [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
+ [Define if we should use leading underscore on 64 bit mingw targets])])
+
AC_ARG_ENABLE(cld,
[ --enable-cld enable -mcld by default for 32bit x86], [],
[enable_cld=no])
gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
[elf,2,13,0],,
[ .hidden foobar
-foobar:])
+foobar:],[
+# Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
+# STV_HIDDEN, so disable .hidden support if so.
+case "${target}" in
+ i?86-*-solaris2*)
+ if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
+ cat > conftest.s <<EOF
+.globl hidden
+ .hidden hidden
+hidden:
+.globl default
+ .set default,hidden
+EOF
+ if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
+ && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
+ grep '\.hidden default' > /dev/null; then
+ gcc_cv_as_hidden=no
+ else
+ gcc_cv_as_hidden=yes
+ fi
+ else
+ # Assume bug is present if objdump is missing.
+ gcc_cv_as_hidden=no
+ fi
+ ;;
+ *)
+ gcc_cv_as_hidden=yes
+ ;;
+esac])
changequote(,)dnl
if test $in_tree_ld != yes ; then
gcc_cv_ld_hidden=yes
;;
*-*-solaris2.9* | *-*-solaris2.1[0-9]*)
+ # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
+ # .symbolic was only added in Solaris 9 12/02.
gcc_cv_ld_hidden=yes
;;
*)
rm -f conftest],
[AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
[Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
+ # Test if the assembler supports the extended form of the .section
+ # directive that specifies section alignment. LTO support uses this,
+ # but normally only after installation, so we warn but don't fail the
+ # configure if LTO is enabled but the assembler does not support it.
+ gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
+ [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
+ if test x$gcc_cv_as_section_has_align != xyes; then
+ case ",$enable_languages," in
+ *,lto,*)
+ AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
+ ;;
+ esac
+ fi
;;
esac
[AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
[Define if your assembler supports the ffreep mnemonic.])])
+ gcc_GAS_CHECK_FEATURE([.quad directive],
+ gcc_cv_as_ix86_quad,,,
+ [.quad 0],,
+ [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
+ [Define if your assembler supports the .quad directive.])])
+
gcc_GAS_CHECK_FEATURE([sahf mnemonic],
gcc_cv_as_ix86_sahf,,,
- [sahf],,
+ [.code64
+ sahf],,
[AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
- [Define if your assembler supports the sahf mnemonic.])])
+ [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
gcc_GAS_CHECK_FEATURE([swap suffix],
gcc_cv_as_ix86_swap,,,
[AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
[Define if your assembler supports the subtraction of symbols in different sections.])])
- # This one is used unconditionally by i386.[ch]; it is to be defined
+ # These two are used unconditionally by i386.[ch]; it is to be defined
# to 1 if the feature is present, 0 otherwise.
gcc_GAS_CHECK_FEATURE([GOTOFF in data],
gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
[`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
[Define true if the assembler supports '.long foo@GOTOFF'.])
+
+ gcc_GAS_CHECK_FEATURE([rep and lock prefix],
+ gcc_cv_as_ix86_rep_lock_prefix,,,
+ [rep movsl
+ lock orl $0, (%esp)])
+ AC_DEFINE_UNQUOTED(HAVE_AS_IX86_REP_LOCK_PREFIX,
+ [`if test $gcc_cv_as_ix86_rep_lock_prefix = yes; then echo 1; else echo 0; fi`],
+ [Define true if the assembler supports 'rep <insn>, lock <insn>'.])
+
;;
ia64*-*-*)
echo ' .end x' >> conftest.s
if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
&& $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
- if $gcc_cv_objdump -d conftest.so | grep -q jalr \
- && $gcc_cv_objdump -d conftest.so | grep -q "bal.*<x>"; then
+ if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
+ && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
gcc_cv_as_ld_jalr_reloc=yes
fi
fi
if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
| grep "gc-sections option ignored" > /dev/null; then
gcc_cv_ld_eh_gc_sections=no
- elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
+ elif $gcc_cv_objdump -h conftest 2> /dev/null \
+ | grep gcc_except_table > /dev/null; then
gcc_cv_ld_eh_gc_sections=yes
# If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
if test x$gcc_cv_as_comdat_group != xyes; then
if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
| grep "gc-sections option ignored" > /dev/null; then
gcc_cv_ld_eh_gc_sections=no
- elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
+ elif $gcc_cv_objdump -h conftest 2> /dev/null \
+ | grep gcc_except_table > /dev/null; then
gcc_cv_ld_eh_gc_sections=yes
fi
fi
fi
fi
+# In binutils 2.21, GNU ld gained support for new emulations fully
+# supporting the Solaris 2 ABI. Detect their presence in the linker used.
+AC_CACHE_CHECK(linker *_sol2 emulation support,
+ gcc_cv_ld_sol2_emulation,
+ [gcc_cv_ld_sol2_emulation=no
+ if test $in_tree_ld = yes ; then
+ if test "$gcc_cv_gld_major_version" -eq 2 -a \
+ "$gcc_cv_gld_minor_version" -ge 21 -o \
+ "$gcc_cv_gld_major_version" -gt 2 \
+ && test $in_tree_ld_is_elf = yes; then
+ gcc_cv_ld_sol2_emulation=yes
+ fi
+ elif test x$gcc_cv_ld != x; then
+ if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
+ grep _sol2 > /dev/null; then
+ gcc_cv_ld_sol2_emulation=yes
+ fi
+ fi])
+if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
+ AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
+ [Define if your linker supports the *_sol2 emulations.])
+fi
+
AC_CACHE_CHECK(linker --sysroot support,
gcc_cv_ld_sysroot,
[gcc_cv_ld_sysroot=no
all_outputs='Makefile gccbug'
# List of language makefile fragments.
all_lang_makefrags=
-# List of language subdirectory makefiles. Deprecated.
-all_lang_makefiles=
# Additional files for gengtype
all_gtfiles="$target_gtfiles"
if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
fi
- if test -f ${srcdir}/$gcc_subdir/Makefile.in
- then all_lang_makefiles="$gcc_subdir/Makefile"
- fi
all_languages="$all_languages $language"
all_compilers="$all_compilers $compilers"
all_outputs="$all_outputs $outputs"
AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
enable_lto=yes
AC_SUBST(enable_lto)
+ # LTO needs to speak the platform's object file format, and has a
+ # number of implementations of the required binary file access APIs.
+ # ELF is the most common, and default. We only link libelf if ELF
+ # is indeed the selected format.
+ LTO_BINARY_READER=${lto_binary_reader}
+ LTO_USE_LIBELF=-lelf
+ if test "x$lto_binary_reader" != "xlto-elf" ; then
+ LTO_USE_LIBELF=
+ fi
+ AC_SUBST(LTO_BINARY_READER)
+ AC_SUBST(LTO_USE_LIBELF)
;;
*) ;;
esac
AC_SUBST(all_compilers)
AC_SUBST(all_gtfiles)
AC_SUBST(all_lang_makefrags)
-AC_SUBST(all_lang_makefiles)
AC_SUBST(all_languages)
AC_SUBST(all_selected_languages)
AC_SUBST(build_exeext)
pluginlibs=
if test x"$enable_plugin" = x"yes"; then
+ case "${host}" in
+ *-*-darwin*)
+ export_sym_check="$gcc_cv_nm -g"
+ ;;
+ *)
+ export_sym_check="$gcc_cv_objdump -T"
+ ;;
+ esac
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
+ if $export_sym_check 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
+ if $export_sym_check conftest | grep foobar > /dev/null; then
plugin_rdynamic=yes
pluginlibs="-rdynamic"
else
# Check that we can build shared objects with -fPIC -shared
saved_LDFLAGS="$LDFLAGS"
- LDFLAGS="$LDFLAGS -fPIC -shared"
+ case "${host}" in
+ *-*-darwin*)
+ LDFLAGS="$LDFLAGS -fPIC -shared -undefined dynamic_lookup"
+ ;;
+ *)
+ LDFLAGS="$LDFLAGS -fPIC -shared"
+ ;;
+ esac
AC_MSG_CHECKING([for -fPIC -shared])
AC_TRY_LINK(
[extern int X;],[return X == 0;],
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