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| author | Richard Henderson <rth@redhat.com> | 2001-05-14 18:45:10 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2001-05-14 18:45:10 -0700 |
| commit | c64688ae797cb3ed06f9403cd20cfc51e0b6276a (patch) | |
| tree | 50bd83db98d2cce1d8acec334cafab9afd6aedf9 /gcc/configure.in | |
| parent | e8b073c1bd1c589eb6c92da2db2ce00e932d04d4 (diff) | |
| download | gcc-c64688ae797cb3ed06f9403cd20cfc51e0b6276a.tar.gz | |
configure.in (gcc_cv_as_eh_frame): New test.
* configure.in (gcc_cv_as_eh_frame): New test.
* config.in, configure: Rebuild.
* gcc.c (init_spec): Honor USE_AS_TRADITIONAL_FORMAT.
From-SVN: r42092
Diffstat (limited to 'gcc/configure.in')
| -rw-r--r-- | gcc/configure.in | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/gcc/configure.in b/gcc/configure.in index 8b4d9927a6b..313a3f504f1 100644 --- a/gcc/configure.in +++ b/gcc/configure.in @@ -1410,6 +1410,77 @@ if test x"$gcc_cv_as_leb128" = xyes; then fi AC_MSG_RESULT($gcc_cv_as_leb128) +AC_MSG_CHECKING(assembler eh_frame optimization) +gcc_cv_as_eh_frame=no +if test x$gcc_cv_gas_major_version != x -a x$gcc_cv_gas_minor_version != x; then + if test "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 12 -o "$gcc_cv_gas_major_version" -gt 2 && grep 'obj_format = elf' ../gas/Makefile > /dev/null; then + gcc_cv_as_eh_frame="yes" + fi +elif test x$gcc_cv_as != x; then + # Check if this is GAS. + as_ver=`$gcc_cv_as --version 2>/dev/null | head -1` + if echo "$as_ver" | grep GNU > /dev/null; then + # Versions up to and including 2.11.0 may mis-optimize + # .eh_frame data. Try something. + cat > conftest.s <<EOF + .text +.LFB1: + .4byte 0 +.L1: + .4byte 0 +.LFE1: + .section .eh_frame,"aw",@progbits +__FRAME_BEGIN__: + .4byte .LECIE1-.LSCIE1 +.LSCIE1: + .4byte 0x0 + .byte 0x1 + .ascii "z\0" + .byte 0x1 + .byte 0x78 + .byte 0x1a + .byte 0x0 + .byte 0x4 + .4byte 1 + .p2align 1 +.LECIE1: +.LSFDE1: + .4byte .LEFDE1-.LASFDE1 +.LASFDE1: + .4byte .LASFDE1-__FRAME_BEGIN__ + .4byte .LFB1 + .4byte .LFE1-.LFB1 + .byte 0x4 + .4byte .LFE1-.LFB1 + .byte 0x4 + .4byte .L1-.LFB1 +.LEFDE1: +EOF + cat > conftest.exp <<EOF + 0000 10000000 00000000 017a0001 781a0004 .........z..x... + 0010 01000000 12000000 18000000 00000000 ................ + 0020 08000000 04080000 0044 .........D +EOF + # If the assembler didn't choke, and we can objdump, + # and we got the correct data, then succeed. + if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \ + && objdump -s -j .eh_frame conftest.o 2>/dev/null \ + | tail -3 > conftest.got \ + && cmp conftest.exp conftest.got > /dev/null 2>&1 + then + gcc_cv_as_eh_frame="yes" + else + gcc_cv_as_eh_frame="bad" + if $gcc_cv_as -o conftest.o --traditional-format /dev/null; then + AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1, + [Define if your assembler mis-optimizes .eh_frame data.]) + fi + fi + fi + rm -f conftest.* +fi +AC_MSG_RESULT($gcc_cv_as_eh_frame) + case "$target" in sparc*-*-*) AC_CACHE_CHECK([assembler .register pseudo-op support], |