optionally support parallel toolchain build. This defaults to off, because certain toolchain versions are known to break on parallel build. However, it significantly speeds up the build and latest versions of the tools do compile fine.

SVN-Revision: 23196

toolchain/gcc/common.mk

@@ -173,7 +173,7 @@ endif
 
 GCC_MAKE:= \
 	export SHELL="$(BASH)"; \
-	$(MAKE) \
+	$(MAKE) $(TOOLCHAIN_JOBS) \
 		CFLAGS_FOR_TARGET="$(TARGET_CFLAGS)" \
 		CXXFLAGS_FOR_TARGET="$(TARGET_CFLAGS)"