[PATCH 3/3] Makefile: don't use "FORCE" for tags targets
From: Ævar Arnfjörð Bjarmason <hidden>
Date: 2021-06-22 14:21:37
Subsystem:
kernel build + files below scripts/ (unless maintained elsewhere), the rest · Maintainers:
Nathan Chancellor, Nicolas Schier, Linus Torvalds
Remove the "FORCE" dependency from the "tags", "TAGS" and "cscope.out" targets, instead make them depend on whether or not the relevant source files have changed. I'm also removing the "-o" option from them, that seems to have been cargo-culted when they were initially added in f81e7c626f3 (Makefile: Add TAGS and tags targets, 2006-03-18). It would make sense to use that option if we had been appending to tag files, it doesn't make any sense that it was used after we'd just removed the files file being appended to. This will potentially cause a partial file to be left behind if the command dies, but my in-flight series to use the ".DELETE_ON_ERROR" flag in the Makefile[1] will make that problem go away. I think even without that it's not problem we need to worry about in these cases. 1. https://lore.kernel.org/git/patch-1.1-9420448e74f-20210622T141100Z-avarab@gmail.com/ (local) Signed-off-by: Ævar Arnfjörð Bjarmason <redacted> --- Makefile | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/Makefile b/Makefile
index 25d2a3e5ddc..89d261230fb 100644
--- a/Makefile
+++ b/Makefile@@ -2727,18 +2727,19 @@ FIND_SOURCE_FILES = ( \ | sed -e 's|^\./||' \ ) -$(ETAGS_TARGET): FORCE - $(QUIET_GEN)$(RM) "$(ETAGS_TARGET)+" && \ - $(FIND_SOURCE_FILES) | xargs etags -a -o "$(ETAGS_TARGET)+" && \ - mv "$(ETAGS_TARGET)+" "$(ETAGS_TARGET)" +FOUND_SOURCE_FILES = $(shell $(FIND_SOURCE_FILES)) -tags: FORCE - $(QUIET_GEN)$(RM) tags+ && \ - $(FIND_SOURCE_FILES) | xargs ctags -a -o tags+ && \ - mv tags+ tags +$(ETAGS_TARGET): $(FOUND_SOURCE_FILES) + $(QUIET_GEN)echo $(FOUND_SOURCE_FILES) | \ + xargs etags -o $@ + +tags: $(FOUND_SOURCE_FILES) + $(QUIET_GEN)echo $(FOUND_SOURCE_FILES) | \ + xargs ctags -o $@ cscope.out: - $(FIND_SOURCE_FILES) | xargs cscope -f$@ -b + $(QUIET_GEN)echo $(FOUND_SOURCE_FILES) | \ + xargs cscope -f$@ -b .PHONY: cscope cscope: cscope.out
@@ -2922,7 +2923,7 @@ check: config-list.h command-list.h exit 1; \ fi -FOUND_C_SOURCES = $(filter %.c,$(shell $(FIND_SOURCE_FILES))) +FOUND_C_SOURCES = $(filter %.c,$(FOUND_SOURCE_FILES)) COCCI_SOURCES = $(filter-out $(THIRD_PARTY_SOURCES),$(FOUND_C_SOURCES)) %.cocci.patch: %.cocci $(COCCI_SOURCES)
--
2.32.0.599.g3967b4fa4ac