Patch from Peter Kjellerstedt:

The attached patch performs a clean up of
extra/gcc-uClibc/Makefile:

* Better dependencies to only rebuild what is necessary.
* Use $< and $@ where appropriate.
* Suppress warning messages from which about
  commands that cannot be found.

//Peter

extra/gcc-uClibc/Makefile

@@ -7,60 +7,60 @@
 TOPDIR = ../../
 include $(TOPDIR)Rules.mak
 
-UCLIBC_DIR = $(shell (cd ../.. ; /bin/pwd))
-GCC_BIN = $(shell which $(CC))
-LD_BIN = $(shell which $(LD))
-GCCINCDIR:= ${shell $(CC) -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp"}
+UCLIBC_DIR := $(shell (cd $(TOPDIR); /bin/pwd))
+GCC_BIN := $(shell which $(CC))
+LD_BIN := $(shell which $(LD))
+GCCINCDIR := $(shell $(CC) -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
 
-all: gcc-uClibc ld-uClibc
+all:	$(TARGET_ARCH)-uclibc-gcc $(TARGET_ARCH)-uclibc-ld
 
-gcc-uClibc.h: Makefile $(TOPDIR)/.config
-	@echo "/* this file was autogenerated by make */" > gcc-uClibc.h
-	@echo "#define UCLIBC_TARGET_PREFIX " \"$(TARGET_PREFIX)\" >> gcc-uClibc.h
-	@echo "#define UCLIBC_DEVEL_PREFIX " \"$(DEVEL_PREFIX)\" >> gcc-uClibc.h
-	@echo "#define UCLIBC_BUILD_DIR " \"$(UCLIBC_DIR)\" >> gcc-uClibc.h
-	@echo "#define GCC_BIN " \"$(GCC_BIN)\" >> gcc-uClibc.h
-	@echo "#define LIBGCC_DIR " \"$(LIBGCC_DIR)\" >> gcc-uClibc.h
-	@echo "#define TARGET_ARCH " \"$(TARGET_ARCH)\" >> gcc-uClibc.h
-	@echo "#define DYNAMIC_LINKER " \"$(DYNAMIC_LINKER)\" >> gcc-uClibc.h
-	@echo "#define BUILD_DYNAMIC_LINKER " \"$(UCLIBC_DIR)/lib/$(UCLIBC_LDSO)\" >> gcc-uClibc.h
+gcc-uClibc.h:	Makefile $(TOPDIR)/.config
+	@echo "/* this file was autogenerated by make */" > $@
+	@echo "#define UCLIBC_TARGET_PREFIX " \"$(TARGET_PREFIX)\" >> $@
+	@echo "#define UCLIBC_DEVEL_PREFIX " \"$(DEVEL_PREFIX)\" >> $@
+	@echo "#define UCLIBC_BUILD_DIR " \"$(UCLIBC_DIR)\" >> $@
+	@echo "#define GCC_BIN " \"$(GCC_BIN)\" >> $@
+	@echo "#define LIBGCC_DIR " \"$(LIBGCC_DIR)\" >> $@
+	@echo "#define TARGET_ARCH " \"$(TARGET_ARCH)\" >> $@
+	@echo "#define DYNAMIC_LINKER " \"$(DYNAMIC_LINKER)\" >> $@
+	@echo "#define BUILD_DYNAMIC_LINKER " \"$(UCLIBC_DIR)/lib/$(UCLIBC_LDSO)\" >> $@
 ifeq ($(strip $(HAVE_SHARED)),y)
-	@echo "#define __UCLIBC_HAS_SHARED__ 1" >> gcc-uClibc.h
+	@echo "#define __UCLIBC_HAS_SHARED__ 1" >> $@
 else
-	@echo "#undef __UCLIBC_HAS_SHARED__" >> gcc-uClibc.h
+	@echo "#undef __UCLIBC_HAS_SHARED__" >> $@
 endif
 ifeq ($(strip $(UCLIBC_HAS_MMU)),y)
-	@echo "#define __UCLIBC_HAS_MMU__ 1" >> gcc-uClibc.h
+	@echo "#define __UCLIBC_HAS_MMU__ 1" >> $@
 else
-	@echo "#undef __UCLIBC_HAS_MMU__" >> gcc-uClibc.h
+	@echo "#undef __UCLIBC_HAS_MMU__" >> $@
 endif
 ifeq ($(strip $(HAS_ELF)),y)
-	@echo "#define __HAS_ELF__ 1" >> gcc-uClibc.h
+	@echo "#define __HAS_ELF__ 1" >> $@
 else
-	@echo "#undef __HAS_ELF__" >> gcc-uClibc.h
+	@echo "#undef __HAS_ELF__" >> $@
 endif
 ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
-	@echo "#define __UCLIBC_CTOR_DTOR__ 1" >> gcc-uClibc.h
+	@echo "#define __UCLIBC_CTOR_DTOR__ 1" >> $@
 ifeq ($(strip $(UCLIBC_PROFILING)),y)
-	@echo "#define __UCLIBC_PROFILING__ 1" >> gcc-uClibc.h
+	@echo "#define __UCLIBC_PROFILING__ 1" >> $@
 else
-	@echo "#undef __UCLIBC_PROFILING__" >> gcc-uClibc.h
+	@echo "#undef __UCLIBC_PROFILING__" >> $@
 endif
 else
-	@echo "#undef __UCLIBC_CTOR_DTOR__" >> gcc-uClibc.h
+	@echo "#undef __UCLIBC_CTOR_DTOR__" >> $@
 endif
 
-gcc-uClibc: gcc-uClibc.h gcc-uClibc.c
-	$(HOSTCC) $(HOSTCFLAGS) -s gcc-uClibc.c -o $(TARGET_ARCH)-uclibc-gcc
+$(TARGET_ARCH)-uclibc-gcc:	gcc-uClibc.c gcc-uClibc.h
+	$(HOSTCC) $(HOSTCFLAGS) -s $< -o $@
 
-ld-uClibc:
-	@echo "#!/bin/sh" > $(TARGET_ARCH)-uclibc-ld
-	@echo "# This file was autogenerated by make" >> $(TARGET_ARCH)-uclibc-ld
-	@echo "$(LD_BIN) \$$@ -L$(DEVEL_PREFIX)/usr/lib -L$(DEVEL_PREFIX)/lib "\
-		"-L$(UCLIBC_DIR)" >> $(TARGET_ARCH)-uclibc-ld
-	chmod a+x $(TARGET_ARCH)-uclibc-ld
+$(TARGET_ARCH)-uclibc-ld:	Makefile $(TOPDIR)/.config
+	@echo "#!/bin/sh" > $@
+	@echo "# This file was autogenerated by make" >> $@
+	@echo "exec $(LD_BIN) \"\$$@\" -L$(DEVEL_PREFIX)/usr/lib " \
+		"-L$(DEVEL_PREFIX)/lib -L$(UCLIBC_DIR)" >> $@
+	chmod a+x $@
 
-install: all
+install:	all
 	install -d $(PREFIX)$(DEVEL_TOOL_PREFIX)/bin;
 	install -d $(PREFIX)$(SYSTEM_DEVEL_PREFIX)/bin;
 	install -m 755 $(TARGET_ARCH)-uclibc-gcc $(PREFIX)$(SYSTEM_DEVEL_PREFIX)/bin/
@@ -77,14 +77,12 @@ ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
 endif
 	for app in addr2line ar as cpp gasp nm objcopy \
 	    objdump ranlib size strings strip; do \
-	  APPNAME=`which $(CROSS)$${app}`; \
+	  APPNAME=`which $(CROSS)$${app} 2>/dev/null`; \
 	  if [ -x "$$APPNAME" ] ; then \
-	  ln -fs "$$APPNAME" $(PREFIX)$(DEVEL_TOOL_PREFIX)/bin/$${app}; \
-	  ln -fs "$$APPNAME" $(PREFIX)$(SYSTEM_DEVEL_PREFIX)/bin/$(TARGET_ARCH)-uclibc-$${app}; \
+	    ln -fs "$$APPNAME" $(PREFIX)$(DEVEL_TOOL_PREFIX)/bin/$${app}; \
+	    ln -fs "$$APPNAME" $(PREFIX)$(SYSTEM_DEVEL_PREFIX)/bin/$(TARGET_ARCH)-uclibc-$${app}; \
 	  fi; \
 	done
 
 clean:
 	rm -f gcc-uClibc.h *-uclibc-gcc *-uclibc-ld core
-
-