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

--- 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 @@
 #define USE_LD_AS_NEEDED 1
 #endif
 
+#ifndef LIBGCC_SPEC
+#define LIBGCC_SPEC "%{static|static-libgcc:-lgcc}%{!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.  */
--- a/gcc/mkmap-symver.awk
+++ b/gcc/mkmap-symver.awk
@@ -132,5 +132,5 @@
   else if (inherit[lib])
     printf("} %s;\n", inherit[lib]);
   else
-    printf ("\n  local:\n\t*;\n};\n");
+    printf ("\n\t*;\n};\n");
 }
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -265,7 +265,7 @@
 # For -fvisibility=hidden.  We need both a -fvisibility=hidden on
 # the command line, and a #define to prevent libgcc2.h etc from
 # overriding that with #pragmas.
-vis_hide = @vis_hide@
+vis_hide =
 
 ifneq (,$(vis_hide))
 
--- a/gcc/config/rs6000/linux.h
+++ b/gcc/config/rs6000/linux.h
@@ -85,6 +85,8 @@
 #define USE_LD_AS_NEEDED 1
 #endif
 
+#define LIBGCC_SPEC "%{!static:%{!static-libgcc:-lgcc_s}} -lgcc"
+
 #undef  TARGET_VERSION
 #define TARGET_VERSION fprintf (stderr, " (PowerPC GNU/Linux)");