gcc: Include libgcc.a on those architectures that need it

Right now these are arm, hppa, microblaze, powerpc, sh and xtensa.
So we just try to grep for it to figure out if it is needed.

Signed-off-by: Harald Geyer <harald@ccbib.org>
Signed-off-by: Christian Beier <dontmind@freeshell.org>

devel/gcc/Makefile

@@ -110,6 +110,7 @@ define Package/gcc/install
 	cp -ar $(TOOLCHAIN_DIR)/include $(1)/usr/lib/$(PKG_NAME)/$(REAL_GNU_TARGET_NAME)/$(PKG_VERSION)
 	cp -a $(TOOLCHAIN_DIR)/lib/*.{o,so*} $(1)/usr/lib/$(PKG_NAME)/$(REAL_GNU_TARGET_NAME)/$(PKG_VERSION)
 	cp -a $(TOOLCHAIN_DIR)/lib/*nonshared*.a  $(1)/usr/lib/$(PKG_NAME)/$(REAL_GNU_TARGET_NAME)/$(PKG_VERSION)
+	grep "GROUP.*-lgcc" $(1)/usr/lib/$(PKG_NAME)/$(REAL_GNU_TARGET_NAME)/$(PKG_VERSION)/libgcc_s.so && cp -a $(PKG_INSTALL_DIR)/usr/lib/gcc/$(REAL_GNU_TARGET_NAME)/$(PKG_VERSION)/libgcc.a $(1)/usr/lib/$(PKG_NAME)/$(REAL_GNU_TARGET_NAME)/$(PKG_VERSION)/ ; true
 endef
 
 $(eval $(call BuildPackage,gcc))

devel/gcc/README

@@ -1,8 +1,9 @@
 Native GCC that runs on target.
 
 To save disk space, this GCC only supports dynamic linking on the target box,
-there are no static libraries shipped.
+there are no static libraries shipped except libgcc.a on those architectures
+that need it.
 
 For now, this was only tested on a mips target. Others to be done...
 
-   Christian Beier <cb@shoutrlabs.com>
+   Christian Beier <cb@shoutrlabs.com>