Re: [RFC/PATCH] Avoid TAGS/tags warning from GNU Make

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Matthieu Moy <Matthieu.Moy@xxxxxxxxxxxxxxx> writes:

> Jonathan Nieder <jrnieder@xxxxxxxxx> writes:
>
>> From: Johannes Schindelin <johannes.schindelin@xxxxxx>
>> Date: Thu, 22 Oct 2009 19:04:17 +0200
>>
>> MinGW make considers the TAGS and tags targets to refer to
>> the same file:
>>
>>  Makefile: warning: overriding commands for target `TAGS'
>>  Makefile: warning: ignoring old commands for target `TAGS'
>>
>> Suppress both targets on that platform.
>
> Wouldn't it be more sensible to rename them (like ETAGS/CTAGS) on
> mingw instead, in case someone wants to use these files on windows?

I think that makes much more sense.  How about doing it that way, perhaps
something like this?

By the way, doesn't case insensitive HFS+ have the same issue?

-- >8 --
[Subject] MinGW: avoid collisions between "tags" and "TAGS"

On case insensitive filesystems, "tags" and "TAGS" target will try to
overwrite the same file.  Allow MinGW to use "ETAGS" instead.

These two targets do produce real files; do not put them on .PHONY target
list.

Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---

 Makefile |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 8b7c243..d87efdd 100644
--- a/Makefile
+++ b/Makefile
@@ -390,6 +390,8 @@ SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
 	  $(patsubst %.py,%,$(SCRIPT_PYTHON)) \
 	  git-instaweb
 
+ETAGS_TARGET = TAGS
+
 # Empty...
 EXTRA_PROGRAMS =
 
@@ -1120,6 +1122,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	NO_REGEX = YesPlease
 	NO_PYTHON = YesPlease
 	BLK_SHA1 = YesPlease
+	ETAGS_TARGET = ETAGS
 	COMPAT_CFLAGS += -D__USE_MINGW_ACCESS -DNOGDI -Icompat -Icompat/fnmatch -Icompat/win32
 	COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
 	COMPAT_OBJS += compat/mingw.o compat/fnmatch/fnmatch.o compat/winansi.o \
@@ -1954,9 +1957,9 @@ info:
 pdf:
 	$(MAKE) -C Documentation pdf
 
-TAGS:
-	$(RM) TAGS
-	$(FIND) . -name '*.[hcS]' -print | xargs etags -a
+$(ETAGS_TARGET):
+	$(RM) $(ETAGS_TARGET)
+	$(FIND) . -name '*.[hcS]' -print | xargs etags -a -o $(ETAGS_TARGET)
 
 tags:
 	$(RM) tags
@@ -2228,7 +2231,7 @@ clean:
 	$(RM) $(TEST_PROGRAMS)
 	$(RM) -r bin-wrappers
 	$(RM) -r $(dep_dirs)
-	$(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo common-cmds.h TAGS tags cscope*
+	$(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo common-cmds.h $(ETAGS_TARGET) tags cscope*
 	$(RM) -r autom4te.cache
 	$(RM) config.log config.mak.autogen config.mak.append config.status config.cache
 	$(RM) -r $(GIT_TARNAME) .doc-tmp-dir
@@ -2252,7 +2255,7 @@ endif
 
 .PHONY: all install clean strip
 .PHONY: shell_compatibility_test please_set_SHELL_PATH_to_a_more_modern_shell
-.PHONY: FORCE TAGS tags cscope
+.PHONY: FORCE cscope
 
 ### Check documentation
 #
--
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