* configure.in (gcc_cv_as_eh_frame): New test.

        * config.in, configure: Rebuild.
        * gcc.c (init_spec): Honor USE_AS_TRADITIONAL_FORMAT.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@42092 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 82 insertions, 8 deletions

diff --git a/gcc/configure b/gcc/configure
index 8cb673478c9..84f8abd2ffb 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -2018,7 +2018,7 @@ EOF
 fi
 
 # Find some useful tools
-for ac_prog in mawk gawk nawk awk
+for ac_prog in gawk mawk nawk awk
 do
 # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -6888,10 +6888,84 @@ EOF
 fi
 echo "$ac_t""$gcc_cv_as_leb128" 1>&6
 
+echo $ac_n "checking assembler eh_frame optimization""... $ac_c" 1>&6
+echo "configure:6893: checking assembler eh_frame optimization" >&5
+gcc_cv_as_eh_frame=no
+if test x$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 $gcc_cv_as -o conftest.o --traditional-format /dev/null; then
+				cat >> confdefs.h <<\EOF
+#define USE_AS_TRADITIONAL_FORMAT 1
+EOF
+
+			fi
+		fi
+	fi
+	rm -f conftest.*
+fi
+echo "$ac_t""$gcc_cv_as_eh_frame" 1>&6
+
 case "$target" in 
   sparc*-*-*)
     echo $ac_n "checking assembler .register pseudo-op support""... $ac_c" 1>&6
-echo "configure:6895: checking assembler .register pseudo-op support" >&5
+echo "configure:6969: checking assembler .register pseudo-op support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_register_pseudo_op'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6919,7 +6993,7 @@ EOF
     fi
 
     echo $ac_n "checking assembler supports -relax""... $ac_c" 1>&6
-echo "configure:6923: checking assembler supports -relax" >&5
+echo "configure:6997: checking assembler supports -relax" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_relax_opt'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6949,7 +7023,7 @@ EOF
     case "$tm_file" in
     *64*)
 	echo $ac_n "checking for 64 bit support in assembler ($gcc_cv_as)""... $ac_c" 1>&6
-echo "configure:6953: checking for 64 bit support in assembler ($gcc_cv_as)" >&5
+echo "configure:7027: checking for 64 bit support in assembler ($gcc_cv_as)" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_flags64'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6994,7 +7068,7 @@ EOF
 
     if test "x$gcc_cv_as_flags64" != xno; then
 	echo $ac_n "checking for assembler offsetable %lo() support""... $ac_c" 1>&6
-echo "configure:6998: checking for assembler offsetable %lo() support" >&5
+echo "configure:7072: checking for assembler offsetable %lo() support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_offsetable_lo10'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7033,7 +7107,7 @@ EOF
 
   i[34567]86-*-*)
     echo $ac_n "checking assembler instructions""... $ac_c" 1>&6
-echo "configure:7037: checking assembler instructions" >&5
+echo "configure:7111: checking assembler instructions" >&5
     gcc_cv_as_instructions=
     if test x$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 "$gcc_cv_gas_minor_version" -ge 9 -o "$gcc_cv_gas_major_version" -gt 2; then
@@ -7062,7 +7136,7 @@ EOF
 esac
 
 echo $ac_n "checking assembler dwarf2 debug_line support""... $ac_c" 1>&6
-echo "configure:7066: checking assembler dwarf2 debug_line support" >&5
+echo "configure:7140: checking assembler dwarf2 debug_line support" >&5
 gcc_cv_as_dwarf2_debug_line=no
 # ??? Not all targets support dwarf2 debug_line, even within a version
 # of gas.  Moreover, we need to emit a valid instruction to trigger any
@@ -7247,7 +7321,7 @@ fi
 
 
 echo $ac_n "checking whether to enable maintainer-specific portions of Makefiles""... $ac_c" 1>&6
-echo "configure:7251: checking whether to enable maintainer-specific portions of Makefiles" >&5
+echo "configure:7325: checking whether to enable maintainer-specific portions of Makefiles" >&5
     # Check whether --enable-maintainer-mode or --disable-maintainer-mode was given.
 if test "${enable_maintainer_mode+set}" = set; then
   enableval="$enable_maintainer_mode"