fixup gmp-boot1

Change-Id: Ie26b1ff6ec96033fcfb1f4bd0a00eeaaeccda0ff

gnu/local.mk

@@ -1365,6 +1365,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/gcc-asan-missing-include.patch		\
   %D%/packages/patches/gcc-boot-2.95.3.patch			\
   %D%/packages/patches/gcc-boot-4.6.4.patch			\
+  %D%/packages/patches/gcc-boot-4.6.4-riscv64-support.patch	\
+  %D%/packages/patches/gcc-boot-4.6.4-riscv64-libstdc++-support.patch	\
   %D%/packages/patches/gcc-cross-environment-variables.patch	\
   %D%/packages/patches/gcc-cross-gxx-include-dir.patch          \
   %D%/packages/patches/gcc-fix-texi2pod.patch			\

gnu/packages/patches/gcc-boot-4.6.4-riscv64-libstdc++-support.patch

@@ -0,0 +1,31 @@
+This is part 2 of the diff between Ekaitz's branch and upstream's releases/gcc-4.6.4 branch.
+It only contains the libstdc++ diff.
+
+diff --git a/libstdc++-v3/config/os/generic/os_defines.h b/libstdc++-v3/config/os/generic/os_defines.h
+index 3199bf30bb3..b8d7c16361e 100644
+--- a/libstdc++-v3/config/os/generic/os_defines.h
++++ b/libstdc++-v3/config/os/generic/os_defines.h
+@@ -33,4 +33,9 @@
+ // System-specific #define, typedefs, corrections, etc, go here.  This
+ // file will come before all others.
+
++// Disable the weak reference logic in gthr.h for os/generic because it
++// is broken on every platform unless there is implementation specific
++// workaround in gthr-posix.h and at link-time for static linking.
++#define _GLIBCXX_GTHREAD_USE_WEAK 0
++
+ #endif
+diff --git a/libstdc++-v3/configure.host b/libstdc++-v3/configure.host
+index e29404c026f..5bbeb7f3763 100644
+--- a/libstdc++-v3/configure.host
++++ b/libstdc++-v3/configure.host
+@@ -236,6 +236,9 @@ case "${host_os}" in
+   freebsd*)
+     os_include_dir="os/bsd/freebsd"
+     ;;
++  linux-musl*)
++    os_include_dir="os/generic"
++    ;;
+   gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
+     if [ "$uclibc" = "yes" ]; then
+       os_include_dir="os/uclibc"