# For platforms with the unwind ABI which includes an unwind library,
# libunwind, we can choose to use the system libunwind.
-AC_ARG_WITH(system-libunwind,
-[ --with-system-libunwind use installed libunwind])
-
# config.gcc also contains tests of with_system_libunwind.
-if test x$with_system_libunwind = xyes; then
- AC_DEFINE(HAVE_GETIPINFO, 1,
-[Define to 1 if system unwind library has _Unwind_GetIPInfo.])
-fi
+GCC_CHECK_UNWIND_GETIPINFO
# --------------------------------------------------------
# Build, host, and target specific configuration fragments
fi
fi
-use_getipinfo=yes
-if test x$with_system_libunwind = xyes; then
- if test x$host = x$target; then
- AC_SEARCH_LIBS(_Unwind_GetIPInfo, unwind,, [use_getipinfo=no])
- fi
-fi
-GCC_TARGET_TEMPLATE(HAVE_GETIPINFO)
-if test x$use_getipinfo = xyes; then
- AC_DEFINE(HAVE_GETIPINFO, 1,
- [Define to 1 if system unwind library has _Unwind_GetIPInfo.])
-else
- echo "The system unwind library does not support _Unwind_GetIPInfo."
-fi
-
# Look for a file containing extra machine modes.
if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
extra_modes_file='$(srcdir)'/config/${extra_modes}
AC_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],,
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
-changequote(,)dnl
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,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
gcc_cv_ld_hidden=no
fi
fi
-changequote([,])dnl
fi
else
case "${target}" in
hppa64*-*-hpux* | ia64*-*-hpux*)
gcc_cv_ld_hidden=yes
;;
+ *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
+ gcc_cv_ld_hidden=yes
+ ;;
*)
gcc_cv_ld_hidden=no
;;
esac
fi
+changequote([,])dnl
fi])
libgcc_visibility=no
AC_SUBST(libgcc_visibility)
[Define if your assembler and linker support .hidden.])
fi
+AC_MSG_CHECKING(linker read-only and read-write section mixing)
+gcc_cv_ld_ro_rw_mix=unknown
+if test $in_tree_ld = yes ; then
+ if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
+ && test $in_tree_ld_is_elf = yes; then
+ gcc_cv_ld_ro_rw_mix=read-write
+ fi
+elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
+ echo '.section myfoosect, "a"' > conftest1.s
+ echo '.section myfoosect, "aw"' > conftest2.s
+ echo '.byte 1' >> conftest2.s
+ echo '.section myfoosect, "a"' > conftest3.s
+ echo '.byte 0' >> conftest3.s
+ if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
+ && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
+ && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
+ && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
+ conftest2.o conftest3.o > /dev/null 2>&1; then
+ gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
+ | sed -e '/myfoosect/!d' -e N`
+ if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
+ if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
+ gcc_cv_ld_ro_rw_mix=read-only
+ else
+ gcc_cv_ld_ro_rw_mix=read-write
+ fi
+ fi
+ fi
+changequote(,)dnl
+ rm -f conftest.* conftest[123].*
+changequote([,])dnl
+fi
+if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
+ AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
+ [Define if your linker links a mix of read-only
+ and read-write sections into a read-write section.])
+fi
+AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
+
# Check if we have .[us]leb128, and support symbol arithmetic with it.
gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
[elf,2,11,0],,
.cfi_same_value 1
.cfi_def_cfa 1, 2
.cfi_escape 1, 2, 3, 4, 5
- .cfi_endproc])
+ .cfi_endproc],
+[case "$target" in
+ *-*-solaris*)
+ # If the linker used on Solaris (like Sun ld) isn't capable of merging
+ # read-only and read-write sections, we need to make sure that the
+ # assembler used emits read-write .eh_frame sections.
+ if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
+ if test "x$gcc_cv_objdump" != x; then
+ if $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=no
+ else
+ gcc_cv_as_cfi_directive=yes
+ fi
+ else
+ # no objdump, err on the side of caution
+ gcc_cv_as_cfi_directive=no
+ fi
+ else
+ gcc_cv_as_cfi_directive=yes
+ fi
+ ;;
+ *-*-*)
+ gcc_cv_as_cfi_directive=yes
+ ;;
+esac])
+if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_readelf != x; then
+gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
+ ,,
+[ .text
+ .cfi_startproc
+ .cfi_adjust_cfa_offset 64
+ .skip 512, 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
+ 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
+fi
AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
- [`if test $gcc_cv_as_cfi_directive = yes; then echo 1; else echo 0; fi`],
+ [`if test $gcc_cv_as_cfi_directive = yes \
+ && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
[Define 0/1 if your assembler supports CFI directives.])
gcc_GAS_CHECK_FEATURE([cfi personality directive],
i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-* | m68*-*-* \
| x86_64*-*-* | hppa*-*-* | arm*-*-* \
| xstormy16*-*-* | cris-*-* | xtensa*-*-* | bfin-*-* | score*-*-* \
- | spu-*-* | fido*-*-*)
+ | spu-*-* | fido*-*-* | m32c-*-*)
insn="nop"
;;
ia64*-*-* | s390*-*-*)
[Define if the assembler won't complain about a line such as # 0 "" 2.])
fi
-AC_MSG_CHECKING(linker read-only and read-write section mixing)
-gcc_cv_ld_ro_rw_mix=unknown
-if test $in_tree_ld = yes ; then
- if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
- && test $in_tree_ld_is_elf = yes; then
- gcc_cv_ld_ro_rw_mix=read-write
- fi
-elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
- echo '.section myfoosect, "a"' > conftest1.s
- echo '.section myfoosect, "aw"' > conftest2.s
- echo '.byte 1' >> conftest2.s
- echo '.section myfoosect, "a"' > conftest3.s
- echo '.byte 0' >> conftest3.s
- if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
- && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
- && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
- && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
- conftest2.o conftest3.o > /dev/null 2>&1; then
- gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
- | sed -e '/myfoosect/!d' -e N`
- if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
- if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
- gcc_cv_ld_ro_rw_mix=read-only
- else
- gcc_cv_ld_ro_rw_mix=read-write
- fi
- fi
- fi
-changequote(,)dnl
- rm -f conftest.* conftest[123].*
-changequote([,])dnl
-fi
-if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
- AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
- [Define if your linker links a mix of read-only
- and read-write sections into a read-write section.])
-fi
-AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
-
AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
gcc_cv_ld_eh_frame_hdr=no
if test $in_tree_ld = yes ; then
gcc_cv_libc_provides_ssp,
[gcc_cv_libc_provides_ssp=no
case "$target" in
- *-*-linux*)
+ *-*-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
glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
fi
fi
;;
+ *-*-gnu*)
+ # Avoid complicated tests (see
+ # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
+ # simply assert that glibc does provide this, which is true for all
+ # realistically usable GNU/Hurd configurations.
+ gcc_cv_libc_provides_ssp=yes;;
*-*-darwin*)
AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
[echo "no __stack_chk_fail on this target"])
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