From c6c51600ab4c16f62ab1f4abc518cd84e3a4fed9 Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@suse.de>
Date: Fri, 3 Oct 2003 17:49:39 +0000
Subject: [PATCH] re PR bootstrap/12276 (Configure check for libunwind does not
 work with cross)

	PR bootstrap/12276
	* configure.in: Check for libunwind on the host only if building
	a native compiler.
	* configure: Regenerated.

From-SVN: r72072
---
 gcc/ChangeLog    |   7 +++
 gcc/configure    | 154 ++++++++++++++++++++++++-----------------------
 gcc/configure.in |   6 +-
 3 files changed, 91 insertions(+), 76 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bae0598ba065..e73daffb5723 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2003-10-03  Andreas Schwab  <schwab@suse.de>
+
+	PR bootstrap/12276
+	* configure.in: Check for libunwind on the host only if building
+	a native compiler.
+	* configure: Regenerated.
+
 2003-10-03  Paolo Carlini  <pcarlini@unitus.it>
 
 	* unwind-pe.h (read_encoded_value_with_base): Constify u and
diff --git a/gcc/configure b/gcc/configure
index c28c478f8682..1adcb5dde595 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -5075,8 +5075,9 @@ EOF
 fi
 
 
-echo $ac_n "checking for main in -lunwind""... $ac_c" 1>&6
-echo "configure:5080: checking for main in -lunwind" >&5
+if test x$host = x$target; then
+   echo $ac_n "checking for main in -lunwind""... $ac_c" 1>&6
+echo "configure:5081: checking for main in -lunwind" >&5
 ac_lib_var=`echo unwind'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -5084,14 +5085,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lunwind  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 5088 "configure"
+#line 5089 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:5095: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5096: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -5112,6 +5113,9 @@ else
 use_libunwind_default=no
 fi
 
+else
+   use_libunwind_default=no
+fi
 # Use libunwind based exception handling.
 # Check whether --enable-libunwind-exceptions or --disable-libunwind-exceptions was given.
 if test "${enable_libunwind_exceptions+set}" = set; then
@@ -5388,7 +5392,7 @@ if test -f ../intl/config.intl; then
   . ../intl/config.intl
 fi
 echo $ac_n "checking whether NLS is requested""... $ac_c" 1>&6
-echo "configure:5392: checking whether NLS is requested" >&5
+echo "configure:5396: checking whether NLS is requested" >&5
 if test x"$USE_NLS" != xyes; then
   echo "$ac_t""no" 1>&6
 else
@@ -5399,7 +5403,7 @@ EOF
 
 
   echo $ac_n "checking for catalogs to be installed""... $ac_c" 1>&6
-echo "configure:5403: checking for catalogs to be installed" >&5
+echo "configure:5407: checking for catalogs to be installed" >&5
   # Look for .po and .gmo files in the source directory.
   CATALOGS=  
   XLINGUAS=
@@ -5449,7 +5453,7 @@ fi
 case $host_os in
 	win32 | pe | cygwin* | mingw32* | uwin*)
 echo $ac_n "checking whether windows registry support is requested""... $ac_c" 1>&6
-echo "configure:5453: checking whether windows registry support is requested" >&5
+echo "configure:5457: checking whether windows registry support is requested" >&5
 if test "x$enable_win32_registry" != xno; then
   cat >> confdefs.h <<\EOF
 #define ENABLE_WIN32_REGISTRY 1
@@ -5458,14 +5462,14 @@ EOF
   echo "$ac_t""yes" 1>&6
   
 echo $ac_n "checking for library containing RegOpenKeyExA""... $ac_c" 1>&6
-echo "configure:5462: checking for library containing RegOpenKeyExA" >&5
+echo "configure:5466: checking for library containing RegOpenKeyExA" >&5
 if eval "test \"`echo '$''{'ac_cv_search_RegOpenKeyExA'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_func_search_save_LIBS="$LIBS"
 ac_cv_search_RegOpenKeyExA="no"
 cat > conftest.$ac_ext <<EOF
-#line 5469 "configure"
+#line 5473 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -5476,7 +5480,7 @@ int main() {
 RegOpenKeyExA()
 ; return 0; }
 EOF
-if { (eval echo configure:5480: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5484: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_search_RegOpenKeyExA="none required"
 else
@@ -5487,7 +5491,7 @@ rm -f conftest*
 test "$ac_cv_search_RegOpenKeyExA" = "no" && for i in advapi32; do
 LIBS="-l$i  $ac_func_search_save_LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 5491 "configure"
+#line 5495 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -5498,7 +5502,7 @@ int main() {
 RegOpenKeyExA()
 ; return 0; }
 EOF
-if { (eval echo configure:5502: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5506: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_search_RegOpenKeyExA="-l$i"
 break
@@ -5540,7 +5544,7 @@ esac
 
 if test "x$enable_win32_registry" != xno; then
   echo $ac_n "checking registry key on windows hosts""... $ac_c" 1>&6
-echo "configure:5544: checking registry key on windows hosts" >&5
+echo "configure:5548: checking registry key on windows hosts" >&5
   cat >> confdefs.h <<EOF
 #define WIN32_REGISTRY_KEY "$gcc_cv_win32_registry_key"
 EOF
@@ -5809,7 +5813,7 @@ esac
 # build->target assembler and hope that it will have the same features
 # as the host->target assembler we'll be using.
 echo $ac_n "checking what assembler to use""... $ac_c" 1>&6
-echo "configure:5813: checking what assembler to use" >&5
+echo "configure:5817: checking what assembler to use" >&5
 in_tree_gas=no
 gcc_cv_as=
 gcc_cv_gas_major_version=
@@ -5933,7 +5937,7 @@ esac
 # build->target linker and hope that it will have the same features
 # as the host->target linker we'll be using.
 echo $ac_n "checking what linker to use""... $ac_c" 1>&6
-echo "configure:5937: checking what linker to use" >&5
+echo "configure:5941: checking what linker to use" >&5
 in_tree_ld=no
 gcc_cv_ld=
 gcc_cv_gld_major_version=
@@ -6041,7 +6045,7 @@ esac
 # Figure out what nm we will be using.
 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
 echo $ac_n "checking what nm to use""... $ac_c" 1>&6
-echo "configure:6045: checking what nm to use" >&5
+echo "configure:6049: checking what nm to use" >&5
 in_tree_nm=no
 if test -x nm$host_exeext; then
 	gcc_cv_nm=./nm$host_exeext
@@ -6064,7 +6068,7 @@ esac
 
 # Figure out what objdump we will be using.
 echo $ac_n "checking what objdump to use""... $ac_c" 1>&6
-echo "configure:6068: checking what objdump to use" >&5
+echo "configure:6072: checking what objdump to use" >&5
 in_tree_objdump=no
 if test -x objdump$host_exeext; then
 	gcc_cv_objdump=./objdump$host_exeext
@@ -6089,7 +6093,7 @@ esac
 
 # Figure out what assembler alignment features are present.
 echo $ac_n "checking assembler for .balign and .p2align""... $ac_c" 1>&6
-echo "configure:6093: checking assembler for .balign and .p2align" >&5
+echo "configure:6097: checking assembler for .balign and .p2align" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_balign_and_p2align'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6101,7 +6105,7 @@ fi
   elif test x$gcc_cv_as != x; then
     echo '.balign 4
 .p2align 2' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6105: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6109: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_balign_and_p2align=yes
     else
@@ -6121,7 +6125,7 @@ EOF
 fi
 
 echo $ac_n "checking assembler for .p2align with maximum skip""... $ac_c" 1>&6
-echo "configure:6125: checking assembler for .p2align with maximum skip" >&5
+echo "configure:6129: checking assembler for .p2align with maximum skip" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_max_skip_p2align'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6132,7 +6136,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo '.p2align 4,,7' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6136: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6140: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_max_skip_p2align=yes
     else
@@ -6152,7 +6156,7 @@ EOF
 fi
 
 echo $ac_n "checking assembler for working .subsection -1""... $ac_c" 1>&6
-echo "configure:6156: checking assembler for working .subsection -1" >&5
+echo "configure:6160: checking assembler for working .subsection -1" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_subsection_m1'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6167,7 +6171,7 @@ fi
 .subsection -1
 conftest_label2: .word 0
 .previous' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6171: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6175: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	if test x$gcc_cv_nm != x; then
     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
@@ -6195,7 +6199,7 @@ EOF
 fi
 
 echo $ac_n "checking assembler for .weak""... $ac_c" 1>&6
-echo "configure:6199: checking assembler for .weak" >&5
+echo "configure:6203: checking assembler for .weak" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_weak'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6206,7 +6210,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo '	.weak foobar' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6210: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6214: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_weak=yes
     else
@@ -6233,7 +6237,7 @@ fi
 # to be safe.
 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
 echo $ac_n "checking assembler for .hidden""... $ac_c" 1>&6
-echo "configure:6237: checking assembler for .hidden" >&5
+echo "configure:6241: checking assembler for .hidden" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_hidden'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6246,7 +6250,7 @@ fi
   elif test x$gcc_cv_as != x; then
     echo '	.hidden foobar
 foobar:' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6250: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6254: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_hidden=yes
     else
@@ -6261,7 +6265,7 @@ echo "$ac_t""$gcc_cv_as_hidden" 1>&6
 
 
 echo $ac_n "checking linker for .hidden support""... $ac_c" 1>&6
-echo "configure:6265: checking linker for .hidden support" >&5
+echo "configure:6269: checking linker for .hidden support" >&5
 if eval "test \"`echo '$''{'gcc_cv_ld_hidden'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6324,7 +6328,7 @@ fi
 
 # Check if we have .[us]leb128, and support symbol arithmetic with it.
 echo $ac_n "checking assembler for .sleb128 and .uleb128""... $ac_c" 1>&6
-echo "configure:6328: checking assembler for .sleb128 and .uleb128" >&5
+echo "configure:6332: checking assembler for .sleb128 and .uleb128" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_leb128'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6341,7 +6345,7 @@ L1:
 	.uleb128 1280
 	.sleb128 -1010
 L2:' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6345: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6349: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	# GAS versions before 2.11 do not support uleb128,
   # despite appearing to.
@@ -6377,7 +6381,7 @@ fi
 # GAS versions up to and including 2.11.0 may mis-optimize
 # .eh_frame data.
 echo $ac_n "checking assembler for eh_frame optimization""... $ac_c" 1>&6
-echo "configure:6381: checking assembler for eh_frame optimization" >&5
+echo "configure:6385: checking assembler for eh_frame optimization" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_eh_frame'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6420,7 +6424,7 @@ __FRAME_BEGIN__:
 	.byte	0x4
 	.4byte	.L1-.LFB1
 .LEFDE1:' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6424: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6428: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	  cat > conftest.lit <<EOF
  0000 10000000 00000000 017a0001 781a0004  .........z..x...
@@ -6441,7 +6445,7 @@ EOF
     || cmp conftest.big conftest.got > /dev/null 2>&1; }
   then
     gcc_cv_as_eh_frame=yes
-  elif { ac_try='$gcc_cv_as -o conftest.o --traditional-format /dev/null'; { (eval echo configure:6445: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then
+  elif { ac_try='$gcc_cv_as -o conftest.o --traditional-format /dev/null'; { (eval echo configure:6449: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then
     gcc_cv_as_eh_frame=buggy
   else
     # Uh oh, what do we do now?
@@ -6466,7 +6470,7 @@ EOF
 fi
 
 echo $ac_n "checking assembler for section merging support""... $ac_c" 1>&6
-echo "configure:6470: checking assembler for section merging support" >&5
+echo "configure:6474: checking assembler for section merging support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_shf_merge'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6478,7 +6482,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo '.section .rodata.str, "aMS", @progbits, 1' > conftest.s
-    if { ac_try='$gcc_cv_as --fatal-warnings -o conftest.o conftest.s >&5'; { (eval echo configure:6482: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as --fatal-warnings -o conftest.o conftest.s >&5'; { (eval echo configure:6486: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_shf_merge=yes
     else
@@ -6703,7 +6707,7 @@ if test -z "$tls_first_major"; then
   : # If we don't have a check, assume no support.
 else
   echo $ac_n "checking assembler for thread-local storage support""... $ac_c" 1>&6
-echo "configure:6707: checking assembler for thread-local storage support" >&5
+echo "configure:6711: checking assembler for thread-local storage support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_tls'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6714,7 +6718,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo "$conftest_s" > conftest.s
-    if { ac_try='$gcc_cv_as $tls_as_opt --fatal-warnings -o conftest.o conftest.s >&5'; { (eval echo configure:6718: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as $tls_as_opt --fatal-warnings -o conftest.o conftest.s >&5'; { (eval echo configure:6722: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_tls=yes
     else
@@ -6740,7 +6744,7 @@ case "$target" in
   # All TARGET_ABI_OSF targets.
   alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
     echo $ac_n "checking assembler for explicit relocation support""... $ac_c" 1>&6
-echo "configure:6744: checking assembler for explicit relocation support" >&5
+echo "configure:6748: checking assembler for explicit relocation support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_alpha_explicit_relocs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6763,7 +6767,7 @@ fi
 	ldah	$1, d($29)	!gprelhigh
 	lda	$1, d($1)	!gprellow
 	lda	$29, 0($29)	!gpdisp!3' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6767: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6771: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_alpha_explicit_relocs=yes
     else
@@ -6785,14 +6789,14 @@ fi
 
   sparc*-*-*)
     echo $ac_n "checking assembler for .register""... $ac_c" 1>&6
-echo "configure:6789: checking assembler for .register" >&5
+echo "configure:6793: checking assembler for .register" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_sparc_register_op'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   gcc_cv_as_sparc_register_op=no
   if test x$gcc_cv_as != x; then
     echo '.register %g2, #scratch' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6796: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6800: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_sparc_register_op=yes
     else
@@ -6812,14 +6816,14 @@ EOF
 fi
 
     echo $ac_n "checking assembler for -relax option""... $ac_c" 1>&6
-echo "configure:6816: checking assembler for -relax option" >&5
+echo "configure:6820: checking assembler for -relax option" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_sparc_relax'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   gcc_cv_as_sparc_relax=no
   if test x$gcc_cv_as != x; then
     echo '.text' > conftest.s
-    if { ac_try='$gcc_cv_as -relax -o conftest.o conftest.s >&5'; { (eval echo configure:6823: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as -relax -o conftest.o conftest.s >&5'; { (eval echo configure:6827: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_sparc_relax=yes
     else
@@ -6839,7 +6843,7 @@ EOF
 fi
 
     echo $ac_n "checking assembler for unaligned pcrel relocs""... $ac_c" 1>&6
-echo "configure:6843: checking assembler for unaligned pcrel relocs" >&5
+echo "configure:6847: checking assembler for unaligned pcrel relocs" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_sparc_ua_pcrel'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6852,7 +6856,7 @@ foo:
 .align 4
 .byte 0
 .uaword %r_disp32(foo)' > conftest.s
-    if { ac_try='$gcc_cv_as -K PIC -o conftest.o conftest.s >&5'; { (eval echo configure:6856: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as -K PIC -o conftest.o conftest.s >&5'; { (eval echo configure:6860: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	if test x$gcc_cv_ld != x \
        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
@@ -6875,7 +6879,7 @@ EOF
 
 
       echo $ac_n "checking assembler for unaligned pcrel relocs against hidden symbols""... $ac_c" 1>&6
-echo "configure:6879: checking assembler for unaligned pcrel relocs against hidden symbols" >&5
+echo "configure:6883: checking assembler for unaligned pcrel relocs against hidden symbols" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_sparc_ua_pcrel_hidden'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6890,7 +6894,7 @@ else
 .hidden foo
 foo:
 .skip 4' > conftest.s
-    if { ac_try='$gcc_cv_as -K PIC -o conftest.o conftest.s >&5'; { (eval echo configure:6894: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as -K PIC -o conftest.o conftest.s >&5'; { (eval echo configure:6898: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
 	 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
@@ -6923,7 +6927,7 @@ fi
 fi # unaligned pcrel relocs
 
     echo $ac_n "checking assembler for offsetable %lo()""... $ac_c" 1>&6
-echo "configure:6927: checking assembler for offsetable %lo()" >&5
+echo "configure:6931: checking assembler for offsetable %lo()" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_sparc_offsetable_lo10'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6932,7 +6936,7 @@ else
     echo '.text
 	or %g1, %lo(ab) + 12, %g1
 	or %g1, %lo(ab + 12), %g1' > conftest.s
-    if { ac_try='$gcc_cv_as -xarch=v9 -o conftest.o conftest.s >&5'; { (eval echo configure:6936: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as -xarch=v9 -o conftest.o conftest.s >&5'; { (eval echo configure:6940: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	if test x$gcc_cv_objdump != x \
        && %gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
@@ -6958,7 +6962,7 @@ fi
 
   i[34567]86-*-* | x86_64-*-*)
     echo $ac_n "checking assembler for filds and fists mnemonics""... $ac_c" 1>&6
-echo "configure:6962: checking assembler for filds and fists mnemonics" >&5
+echo "configure:6966: checking assembler for filds and fists mnemonics" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_ix86_filds_fists'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -6969,7 +6973,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo 'filds mem; fists mem' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6973: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:6977: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_ix86_filds_fists=yes
     else
@@ -6989,14 +6993,14 @@ EOF
 fi
 
     echo $ac_n "checking assembler for cmov syntax""... $ac_c" 1>&6
-echo "configure:6993: checking assembler for cmov syntax" >&5
+echo "configure:6997: checking assembler for cmov syntax" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_ix86_cmov_sun_syntax'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   gcc_cv_as_ix86_cmov_sun_syntax=no
   if test x$gcc_cv_as != x; then
     echo 'cmovl.l %edx, %eax' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7000: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7004: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_ix86_cmov_sun_syntax=yes
     else
@@ -7018,7 +7022,7 @@ fi
     # This one is used unconditionally by i386.[ch]; it is to be defined
     # to 1 if the feature is present, 0 otherwise.
     echo $ac_n "checking assembler for GOTOFF in data""... $ac_c" 1>&6
-echo "configure:7022: checking assembler for GOTOFF in data" >&5
+echo "configure:7026: checking assembler for GOTOFF in data" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_ix86_gotoff_in_data'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7033,7 +7037,7 @@ fi
 	nop
 	.data
 	.long .L0@GOTOFF' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7037: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7041: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_ix86_gotoff_in_data=yes
     else
@@ -7054,7 +7058,7 @@ EOF
 
   ia64*-*-*)
     echo $ac_n "checking assembler for ltoffx and ldxmov relocs""... $ac_c" 1>&6
-echo "configure:7058: checking assembler for ltoffx and ldxmov relocs" >&5
+echo "configure:7062: checking assembler for ltoffx and ldxmov relocs" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_ia64_ltoffx_ldxmov_relocs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7068,7 +7072,7 @@ fi
 	addl r15 = @ltoffx(x#), gp
 	;;
 	ld8.mov r16 = [r15], x#' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7072: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7076: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_ia64_ltoffx_ldxmov_relocs=yes
     else
@@ -7098,7 +7102,7 @@ fi
 	mfcr 3,128"
 
     echo $ac_n "checking assembler for mfcr field support""... $ac_c" 1>&6
-echo "configure:7102: checking assembler for mfcr field support" >&5
+echo "configure:7106: checking assembler for mfcr field support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_powerpc_mfcrf'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7109,7 +7113,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo "$conftest_s" > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7113: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7117: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_powerpc_mfcrf=yes
     else
@@ -7131,7 +7135,7 @@ fi
 
   mips*-*-*)
     echo $ac_n "checking assembler for explicit relocation support""... $ac_c" 1>&6
-echo "configure:7135: checking assembler for explicit relocation support" >&5
+echo "configure:7139: checking assembler for explicit relocation support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_mips_explicit_relocs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7142,7 +7146,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo '	lw $4,%gp_rel(foo)($4)' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7146: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7150: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_mips_explicit_relocs=yes
     else
@@ -7188,7 +7192,7 @@ if test x"$insn" != x; then
 	.loc 1 3 0
 	$insn"
  echo $ac_n "checking assembler for dwarf2 debug_line support""... $ac_c" 1>&6
-echo "configure:7192: checking assembler for dwarf2 debug_line support" >&5
+echo "configure:7196: checking assembler for dwarf2 debug_line support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_dwarf2_debug_line'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7200,7 +7204,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo "$conftest_s" > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7204: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7208: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	# ??? This fails with non-gnu grep.  Maybe use objdump?
    if grep debug_line conftest.o > /dev/null 2>&1; then
@@ -7222,7 +7226,7 @@ echo "$ac_t""$gcc_cv_as_dwarf2_debug_line" 1>&6
 # by DW_AT_decl_file.  Approximate this test by testing if
 # the assembler bitches if the same index is assigned twice.
  echo $ac_n "checking assembler for buggy dwarf2 .file directive""... $ac_c" 1>&6
-echo "configure:7226: checking assembler for buggy dwarf2 .file directive" >&5
+echo "configure:7230: checking assembler for buggy dwarf2 .file directive" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_dwarf2_file_buggy'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7230,7 +7234,7 @@ else
   if test x$gcc_cv_as != x; then
     echo '	.file 1 "foo.s"
 	.file 1 "bar.s"' > conftest.s
-    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7234: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'; { (eval echo configure:7238: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_dwarf2_file_buggy=yes
     else
@@ -7253,7 +7257,7 @@ EOF
  fi
 
  echo $ac_n "checking assembler for --gdwarf2 option""... $ac_c" 1>&6
-echo "configure:7257: checking assembler for --gdwarf2 option" >&5
+echo "configure:7261: checking assembler for --gdwarf2 option" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_gdwarf2_flag'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7265,7 +7269,7 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo "$insn" > conftest.s
-    if { ac_try='$gcc_cv_as --gdwarf2 -o conftest.o conftest.s >&5'; { (eval echo configure:7269: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as --gdwarf2 -o conftest.o conftest.s >&5'; { (eval echo configure:7273: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	gcc_cv_as_gdwarf2_flag=yes
     else
@@ -7285,7 +7289,7 @@ EOF
 fi
 
  echo $ac_n "checking assembler for --gstabs option""... $ac_c" 1>&6
-echo "configure:7289: checking assembler for --gstabs option" >&5
+echo "configure:7293: checking assembler for --gstabs option" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_gstabs_flag'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7297,12 +7301,12 @@ else
 fi
   elif test x$gcc_cv_as != x; then
     echo "$insn" > conftest.s
-    if { ac_try='$gcc_cv_as --gstabs -o conftest.o conftest.s >&5'; { (eval echo configure:7301: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+    if { ac_try='$gcc_cv_as --gstabs -o conftest.o conftest.s >&5'; { (eval echo configure:7305: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
     then
 	# The native Solaris 9/Intel assembler doesn't understand --gstabs
    # and warns about it, but still exits successfully.  So check for
    # this.
-   if { ac_try='$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null'; { (eval echo configure:7306: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
+   if { ac_try='$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null'; { (eval echo configure:7310: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }
    then :
    else gcc_cv_as_gstabs_flag=yes
    fi
@@ -7324,7 +7328,7 @@ fi
 fi
 
 echo $ac_n "checking linker read-only and read-write section mixing""... $ac_c" 1>&6
-echo "configure:7328: checking linker read-only and read-write section mixing" >&5
+echo "configure:7332: checking linker read-only and read-write section mixing" >&5
 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 \
@@ -7363,7 +7367,7 @@ fi
 echo "$ac_t""$gcc_cv_ld_ro_rw_mix" 1>&6
 
 echo $ac_n "checking linker PT_GNU_EH_FRAME support""... $ac_c" 1>&6
-echo "configure:7367: checking linker PT_GNU_EH_FRAME support" >&5
+echo "configure:7371: checking linker PT_GNU_EH_FRAME support" >&5
 gcc_cv_ld_eh_frame_hdr=no
 if test $in_tree_ld = yes ; then
   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
@@ -7385,7 +7389,7 @@ fi
 echo "$ac_t""$gcc_cv_ld_eh_frame_hdr" 1>&6
 
 echo $ac_n "checking linker position independent executable support""... $ac_c" 1>&6
-echo "configure:7389: checking linker position independent executable support" >&5
+echo "configure:7393: checking linker position independent executable support" >&5
 gcc_cv_ld_pie=no
 if test $in_tree_ld = yes ; then
   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
@@ -7410,7 +7414,7 @@ echo "$ac_t""$gcc_cv_ld_pie" 1>&6
 case "$target" in
   mips*-*-*)
     echo $ac_n "checking whether libgloss uses STARTUP directives consistently""... $ac_c" 1>&6
-echo "configure:7414: checking whether libgloss uses STARTUP directives consistently" >&5
+echo "configure:7418: checking whether libgloss uses STARTUP directives consistently" >&5
     gcc_cv_mips_libgloss_startup=no
     gcc_cv_libgloss_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/libgloss
     if test "x$exec_prefix" = xNONE; then
@@ -7612,7 +7616,7 @@ fi
 
 
 echo $ac_n "checking whether to enable maintainer-specific portions of Makefiles""... $ac_c" 1>&6
-echo "configure:7616: checking whether to enable maintainer-specific portions of Makefiles" >&5
+echo "configure:7620: checking whether to enable maintainer-specific portions of Makefiles" >&5
     # Check whether --enable-maintainer-mode or --disable-maintainer-mode was given.
 if test "${enable_maintainer_mode+set}" = set; then
   enableval="$enable_maintainer_mode"
diff --git a/gcc/configure.in b/gcc/configure.in
index 6f03111cb1d0..855cd0bc9435 100644
--- a/gcc/configure.in
+++ b/gcc/configure.in
@@ -941,7 +941,11 @@ AC_ARG_ENABLE(sjlj-exceptions,
 AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
   [Define 0/1 to force the choice for exception handling model.])])
 
-AC_CHECK_LIB(unwind, main, use_libunwind_default=yes, use_libunwind_default=no)
+if test x$host = x$target; then
+   AC_CHECK_LIB(unwind, main, use_libunwind_default=yes, use_libunwind_default=no)
+else
+   use_libunwind_default=no
+fi
 # Use libunwind based exception handling.
 AC_ARG_ENABLE(libunwind-exceptions,
 [  --enable-libunwind-exceptions  force use libunwind for exceptions],