gcc-linaro: fix the libgcc spec to default to using the shared libgcc

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25801 3c298f89-4303-0410-b956-a3cf2f4a3e73

toolchain/gcc/patches/linaro/850-use_shared_libgcc.patch

@@ -0,0 +1,37 @@
+--- a/gcc/config/arm/linux-eabi.h
++++ b/gcc/config/arm/linux-eabi.h
+@@ -72,10 +72,6 @@
+ #undef  LINK_SPEC
+ #define LINK_SPEC LINUX_TARGET_LINK_SPEC BE8_LINK_SPEC TARGET_FIX_V4BX_SPEC
+ 
+-/* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we
+-   do not use -lfloat.  */
+-#undef LIBGCC_SPEC
+-
+ /* Clear the instruction cache from `beg' to `end'.  This is
+    implemented in lib1funcs.asm, so ensure an error if this definition
+    is used.  */
+--- a/gcc/config/arm/linux-elf.h
++++ b/gcc/config/arm/linux-elf.h
+@@ -60,8 +60,6 @@
+    %{shared:-lc} \
+    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
+ 
+-#define LIBGCC_SPEC "-lgcc"
+-
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
+ 
+ #define LINUX_TARGET_LINK_SPEC  "%{h*} %{version:-v} \
+--- a/gcc/config/linux.h
++++ b/gcc/config/linux.h
+@@ -104,6 +104,10 @@ see the files COPYING3 and COPYING.RUNTI
+ #define USE_LD_AS_NEEDED 1
+ #endif
+ 
++#ifndef LIBGCC_SPEC
++#define LIBGCC_SPEC "%{static|static-libgcc:-lgcc -lgcc_eh}%{!static:%{!static-libgcc:-lgcc_s}}"
++#endif
++
+ /* Determine which dynamic linker to use depending on whether GLIBC or
+    uClibc is the default C library and whether -muclibc or -mglibc has
+    been passed to change the default.  */