diff options
Diffstat (limited to 'gcc/configure.ac')
| -rw-r--r-- | gcc/configure.ac | 105 |
1 files changed, 65 insertions, 40 deletions
diff --git a/gcc/configure.ac b/gcc/configure.ac index 991a9042183..4d3491c59cd 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -2457,6 +2457,45 @@ if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then [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],, @@ -2496,7 +2535,32 @@ gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive, .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]) AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE, [`if test $gcc_cv_as_cfi_directive = yes; then echo 1; else echo 0; fi`], [Define 0/1 if your assembler supports CFI directives.]) @@ -3525,45 +3589,6 @@ if test "x$gcc_cv_as_line_zero" = xyes; then [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 |