%% [EMAIL PROTECTED] (Jagadish Prasad) writes:
jp> It has nothing to do with permissions. If i turn off the -j switch
jp> then everything goes fine. When i turn it on, then according to
jp> my rule.
jp> all: $(ODIR) $(LIB)
jp> causes make to run the two commands simultaneously.
jp> The $(ODIR) target is used to creating a "depend" directory
jp> which is used by the $(LIB) target. Since those two commands
jp> are run simultaneously. the dependency check fails to create
jp> the file.
Ah. I was confused because the output of your command showed them
happening in the right order, and I didn't notice the -j.
You can't do that.
When you use -j, you can't depend on any ordering of targets that isn't
explicitly stated as a target/prerequisite relationship; here you
haven't said that $(ODIR) is a prerequisite of $(LIB), so make is free
to build them at the same time... and will. Technically it could even
build $(LIB) first; that's allowed.
This is correct behavior on make's part, obviously.
Using a target to create the directory is never a good idea, IMO.
There're all kinds of problems with it. I always recommend (and use
myself) a shell function, like this:
__tmp := $(shell [ -d $(ODIR) ] || $(MKDIR) $(ODIR))
--
-------------------------------------------------------------------------------
Paul D. Smith <[EMAIL PROTECTED]> Find some GNU make tips at:
http://www.gnu.org http://www.ultranet.com/~pauld/gmake/
"Please remain calm...I may be mad, but I am a professional." --Mad Scientist
