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path: root/meta-linaro-toolchain/recipes-devtools/gcc/gcc-4.7/libgcc-sjlj-check.patch
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ac_fn_c_try_compile doesnt seem to keep the intermediate files
which are needed for sjlj test to pass since it greps into the
generated file. So we run the compiler command using AC_TRY_COMMAND
which then generates the needed .s file

Signed-off-by: Khem Raj <raj.khem@gmail.com>

Upstream-Status: Pending
Index: trunk/libgcc/configure
===================================================================
--- trunk.orig/libgcc/configure	2012-03-01 22:59:10.112444433 -0800
+++ trunk/libgcc/configure	2012-03-01 22:59:50.424446325 -0800
@@ -4525,17 +4525,19 @@
 }
 
 _ACEOF
-CFLAGS_hold=$CFLAGS
-CFLAGS="--save-temps -fexceptions"
 libgcc_cv_lib_sjlj_exceptions=unknown
-if ac_fn_c_try_compile; then :
+if { ac_try='${CC-cc} -fexceptions -S conftest.c -o conftest.s 1>&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
   if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
     libgcc_cv_lib_sjlj_exceptions=yes
   elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
     libgcc_cv_lib_sjlj_exceptions=no
   fi
 fi
-CFLAGS=$CFLAGS_hold
 rm -f conftest*
 
 fi
Index: trunk/libgcc/configure.ac
===================================================================
--- trunk.orig/libgcc/configure.ac	2012-03-01 22:59:10.128444406 -0800
+++ trunk/libgcc/configure.ac	2012-03-01 22:59:50.428446373 -0800
@@ -209,16 +209,14 @@
   bar();
 }
 ])])
-CFLAGS_hold=$CFLAGS
-CFLAGS="--save-temps -fexceptions"
 libgcc_cv_lib_sjlj_exceptions=unknown
-AS_IF([ac_fn_c_try_compile],
-  [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
+if AC_TRY_COMMAND(${CC-cc} -fexceptions -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
+  if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
     libgcc_cv_lib_sjlj_exceptions=yes
   elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
     libgcc_cv_lib_sjlj_exceptions=no
-  fi])
-CFLAGS=$CFLAGS_hold
+  fi
+fi
 rm -f conftest*
 ])