[kbuild-devel] [patch 04/04, rfc] use more built-in shell functions

[Oleg V. <ol...@fl...>]

 "Speed up" shell script by using built-in `:', do not access
 trivial commands on file system.

 Signed-off-by: Oleg Verych <ol...@fl...>
---
 Makefile |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Index: linux-2.6.19-rc2-git7/Makefile
===================================================================
--- linux-2.6.19-rc2-git7.orig/Makefile	2006-10-23 07:01:59.114793301 +0000
+++ linux-2.6.19-rc2-git7/Makefile	2006-10-23 07:04:48.088422559 +0000
@@ -480,7 +480,7 @@
 	echo "         include/linux/autoconf.h or $@ are missing.";	\
 	echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
 	echo;								\
-	/bin/false)
+	!:)
 
 endif # KBUILD_EXTMOD
 
@@ -663,7 +663,7 @@
 	$(cmd_sysmap) $@ System.map; \
 	if [ $$? -ne 0 ]; then \
 		rm -f $@; \
-		/bin/false; \
+		!:; \
 	fi;
 	$(verify_kallsyms)
 endef
@@ -702,7 +702,7 @@
 	$(Q)cmp -s System.map .tmp_System.map || \
 		(echo Inconsistent kallsyms data; \
 		 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
-		 rm .tmp_kallsyms* ; /bin/false)
+		 rm .tmp_kallsyms* ; !:)
 endef
 
 # Update vmlinux version before link
@@ -863,7 +863,7 @@
 	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ];then \
 		echo "  $(srctree) is not clean, please run 'make mrproper'"; \
 		echo "  in the '$(srctree)' directory."; \
-		/bin/false; \
+		!:; \
 	fi;
 	$(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 	$(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm

--