From patchwork Fri Sep  3 08:55:04 2010
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Subject: Avoid stack protection when building libgcc
Date: Thu, 02 Sep 2010 22:55:04 -0000
From: Chung-Lin Tang <cltang@codesourcery.com>
X-Patchwork-Id: 63596
Message-Id: <4C80B7E8.5090600@codesourcery.com>
To: gcc-patches <gcc-patches@gcc.gnu.org>

Hi,
this patch adds explicit avoiding of stack protection in libgcc build 
options. Many Linux distros enable -fstack-protector by default, 
building libgcc with it, and causing a link dependency on libssp that's 
sometimes inconvenient.

For a scenario, please see here:
http://lists.linaro.org/pipermail/linaro-toolchain/2010-August/000144.html

Ok, for trunk?

Thanks,
Chung-Lin


Index: Makefile.in
===================================================================
--- Makefile.in	(revision 163797)
+++ Makefile.in	(working copy)
@@ -650,6 +650,7 @@
 LIBGCC2_CFLAGS = -O2 $(LIBGCC2_INCLUDES) $(GCC_CFLAGS) $(TARGET_LIBGCC2_CFLAGS) \
 		 $(LIBGCC2_DEBUG_CFLAGS) $(GTHREAD_FLAGS) \
 		 -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED \
+		 -fno-stack-protector \
 		 $(INHIBIT_LIBC_CFLAGS)
 
 # Additional options to use when compiling libgcc2.a.
@@ -663,6 +664,7 @@
 CRTSTUFF_CFLAGS = -O2 $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -g0 \
   -finhibit-size-directive -fno-inline -fno-exceptions \
   -fno-zero-initialized-in-bss -fno-toplevel-reorder -fno-tree-vectorize \
+  -fno-stack-protector \
   $(INHIBIT_LIBC_CFLAGS)
 
 # Additional sources to handle exceptions; overridden by targets as needed.