From e78e8f2d8318851d0911039999c903a6082bef2e Mon Sep 17 00:00:00 2001 From: Peter Foley Date: Tue, 5 Jul 2011 19:42:18 -0400 Subject: kernel: prevent unnecessary rebuilding due to config_data.gz When IKCONFIG is built-in make oldconfig will cause the kernel to be relinked even if .config didn't change. This happens because of a config_data.gz dependency on .config. This patch changes the if_changed to a filechk so that config_data.h is only rebuilt when the contents have actually changed. Signed-off-by: Peter Foley Signed-off-by: Michal Marek --- kernel/Makefile | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'kernel/Makefile') diff --git a/kernel/Makefile b/kernel/Makefile index 2d64cfcc8b4..d06467fc8f7 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -125,11 +125,10 @@ targets += config_data.gz $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE $(call if_changed,gzip) -quiet_cmd_ikconfiggz = IKCFG $@ - cmd_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;") > $@ + filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;") targets += config_data.h $(obj)/config_data.h: $(obj)/config_data.gz FORCE - $(call if_changed,ikconfiggz) + $(call filechk,ikconfiggz) $(obj)/time.o: $(obj)/timeconst.h -- cgit v1.2.3