yocto-poky/meta/recipes-devtools/gcc/gcc-5.2/0019-libgcc-sjlj-check.patch

From 94f619cd3257e35e20a877640d0cb90c2b3efc15 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 29 Mar 2013 09:20:50 +0400
Subject: [PATCH 19/35] libgcc-sjlj-check

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
---
 libgcc/configure    | 10 ++++++----
 libgcc/configure.ac | 10 ++++------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/libgcc/configure b/libgcc/configure
index 08c9319..5ffaeb3 100644
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -4570,17 +4570,19 @@ void foo ()
 }
 
 _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
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
index 1c405e8..f52975d 100644
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -255,16 +255,14 @@ void foo ()
   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*
 ])
 
-- 
2.1.4