diff options
Diffstat (limited to 'gcc')
| -rwxr-xr-x | gcc/configure | 36 | ||||
| -rw-r--r-- | gcc/configure.ac | 48 |
2 files changed, 46 insertions, 38 deletions
diff --git a/gcc/configure b/gcc/configure index c0d6dc9..5206f0d 100755 --- a/gcc/configure +++ b/gcc/configure @@ -23953,6 +23953,8 @@ _ACEOF # Check if we have .[us]leb128, and support symbol arithmetic with it. +# Older versions of GAS and some non-GNU assemblers, have a bugs handling +# these directives, even when they appear to accept them. { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for .sleb128 and .uleb128" >&5 $as_echo_n "checking assembler for .sleb128 and .uleb128... " >&6; } if ${gcc_cv_as_leb128+:} false; then : @@ -23970,7 +23972,9 @@ fi L1: .uleb128 1280 .sleb128 -1010 -L2:' > conftest.s +L2: + .uleb128 0x8000000000000000 +' > conftest.s if { ac_try='$gcc_cv_as $gcc_cv_as_flags -o conftest.o conftest.s >&5' { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 (eval $ac_try) 2>&5 @@ -23978,22 +23982,22 @@ L2:' > conftest.s $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; } then - # GAS versions before 2.11 do not support uleb128, - # despite appearing to. - # ??? There exists an elf-specific test that will crash - # the assembler. Perhaps it's better to figure out whether - # arbitrary sections are supported and try the test. - as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q` - if echo "$as_ver" | grep GNU > /dev/null; then - 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]*\.\([0-9]*\)'` - if test $as_major -eq 2 && test $as_minor -lt 11 - then : - else gcc_cv_as_leb128=yes - fi + +if test "x$gcc_cv_objdump" != x; then + if $gcc_cv_objdump -s conftest.o 2>/dev/null \ + | grep '04800a8e 78808080 80808080 808001' >/dev/null; then + gcc_cv_as_leb128=yes + fi +elif test "x$gcc_cv_otool" != x; then + if $gcc_cv_otool -d conftest.o 2>/dev/null \ + | grep '04 80 0a 8e 78 80 80 80 80 80 80 80 80 80 01' >/dev/null; then + gcc_cv_as_leb128=yes fi +else + # play safe, assume the assembler is broken. + : +fi + else echo "configure: failed program was" >&5 cat conftest.s >&5 diff --git a/gcc/configure.ac b/gcc/configure.ac index 24679a5..ded124c 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -3072,34 +3072,38 @@ AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix) gcc_AC_INITFINI_ARRAY # Check if we have .[us]leb128, and support symbol arithmetic with it. +# Older versions of GAS and some non-GNU assemblers, have a bugs handling +# these directives, even when they appear to accept them. gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128, - [elf,2,11,0],, + [elf,2,11,0],, [ .data .uleb128 L2 - L1 L1: .uleb128 1280 .sleb128 -1010 -L2:], -[[# 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 - 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]*\.\([0-9]*\)'` - if test $as_major -eq 2 && test $as_minor -lt 11 - then : - else gcc_cv_as_leb128=yes - fi - fi]], - [AC_DEFINE(HAVE_AS_LEB128, 1, - [Define if your assembler supports .sleb128 and .uleb128.])], - [AC_DEFINE(HAVE_AS_LEB128, 0, - [Define if your assembler supports .sleb128 and .uleb128.])]) +L2: + .uleb128 0x8000000000000000 +], +[[ +if test "x$gcc_cv_objdump" != x; then + if $gcc_cv_objdump -s conftest.o 2>/dev/null \ + | grep '04800a8e 78808080 80808080 808001' >/dev/null; then + gcc_cv_as_leb128=yes + fi +elif test "x$gcc_cv_otool" != x; then + if $gcc_cv_otool -d conftest.o 2>/dev/null \ + | grep '04 80 0a 8e 78 80 80 80 80 80 80 80 80 80 01' >/dev/null; then + gcc_cv_as_leb128=yes + fi +else + # play safe, assume the assembler is broken. + : +fi +]], + [AC_DEFINE(HAVE_AS_LEB128, 1, + [Define if your assembler supports .sleb128 and .uleb128.])], + [AC_DEFINE(HAVE_AS_LEB128, 0, + [Define if your assembler supports .sleb128 and .uleb128.])]) # Determine if an .eh_frame section is read-only. gcc_fn_eh_frame_ro () { |