Adding filechk2 function that has the same semantics as filechk, but it takes the target file from the 2nd argument instead of from the '$@' as in the filechk function. This function is needed when we can't have separate target for the file, like in the following patch. Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx> --- scripts/Kbuild.include | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 065324a8046f..9775ce2771d4 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -67,6 +67,30 @@ define filechk fi endef +# filechk2 is used to check if the content of a generated file is updated. +# It follows the same logic as the filechk except instead of the $@ target +# variable, the checked file is passed in 2nd argument. +# +# Sample usage: +# define filechk_sample +# echo $KERNELRELEASE +# endef +# version.h : Makefile +# $(call filechk2,sample,version.h) +# endef +define filechk2 + $(Q)set -e; \ + $(kecho) ' CHK $(2)'; \ + mkdir -p $(dir $(2)); \ + $(filechk_$(1)) < $< > $(2).tmp; \ + if [ -r $(2) ] && cmp -s $(2) $(2).tmp; then \ + rm -f $(2).tmp; \ + else \ + $(kecho) ' UPD $(2)'; \ + mv -f $(2).tmp $(2); \ + fi +endef + ###### # gcc support functions # See documentation in Documentation/kbuild/makefiles.txt -- 2.13.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
