xfsprogs: fix automatic dependency generation

Adding are removing a header file does not result in dependency
regeneration like it should. 'make clean' will rebuild the
dependencies, but a normal 'make' won't. Fix it.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>

diff --git a/include/buildrules b/include/buildrules
index 49cb2a4b990c2c101f8ad9ce1ee718e18404ab54..399635e0c37312d148f09a118f9f04b85dea3692 100644 (file)
--- a/include/buildrules
+++ b/include/buildrules
@@ -79,18 +79,30 @@ endif # _BUILDRULES_INCLUDED_
 $(_FORCE):
 
 # dependency build is automatic, relies on gcc -MM to generate.
+#
+# This is a bit messy. It regenerates the dependencies on each build so
+# that we catch files being added and removed. There are other ways of doing
+# this (e.g. per-file dependency files) but that requires more in-depth changes
+# to the build system. Compile time is not an issue for us, so the
+# rebuild on every make invocation isn't a problem we need to care about. Just
+# do it silently so it doesn't make the build unnecessarily noisy.
+
 .PHONY : depend ltdepend install-qa
 
 MAKEDEP := $(MAKEDEPEND) $(CFLAGS)
 
-ltdepend: .ltdep
+ltdepend: rmltdep .ltdep
+
+rmltdep:
+       @rm -f .ltdep
 
 .ltdep: $(CFILES) $(HFILES)
-       @echo "    [LTDEP]"
        $(Q)$(MAKEDEP) $(CFILES) | $(SED) -e 's,^\([^:]*\)\.o,\1.lo,' > .ltdep
 
-depend: .dep
+depend: rmdep .dep
+
+rmdep:
+       @rm -f .dep
 
 .dep: $(CFILES) $(HFILES)
-       @echo "    [DEP]"
        $(Q)$(MAKEDEP) $(CFILES) > .dep