makefile head-scratcher: multiple targets in one go
Hi!
I've got a build process where scripts create multiple targets from their sources. But here I'm running into a conceptual problem of GNU make: If one has multiple targets in a dependency, make applies the rules once for every target that is out of sync - which is correct for normal compiling, but not here.
Lets say running myscript abcd.conf creates the files a.txt b.txt c.txt and d.txt in one go, and the script should be run if any of the targets are out of sync.
So I've got something like
but that would run mysript abcd.conf four times when abcd.conf gets updated, with $@ pointing at each target in turn . As mysript is quite time- and resource-consuming, this is something I need to avoid. As any of the target files might get out of sync, I can't just select one to force a single run.
I've read the make documentation up and down to no avail, and found nothing useful on Google. My experiments so far have failed, and I'm fresh out of ideas.
I always considered make to be the "swiss army knife" of automated building processes, and used it for quite some odd things over the years, but now I could use some input:
Is that what I want to achieve even possible with GNU make or do I have to look for other options (perl or shell scripts are no problems)?
Is there something in the make documentation that I failed to see or understand properly?
Anyone out there with a clever makefile trick for this?
Hi,
I am getting the following error while building on Solaris 64 , while I am trying to build.
Error Snippet :-
----------------------
Makefile:57: *** multiple target patterns. Stop.
make: Leaving directory `/work1/patch/vds6053sun64o/vobs/jvi'
make: *** Error 2
make: Leaving directory... (0 Replies)
Hi All
I need to parse the target
something like:
ifeq '$@' 'first'
echo 1 $@
endif
ifeq '$@' 'second'
echo 2 $@
endif
The thing is to be able compare the target string to any string and then do the commands
Thanks a lot
ziv (0 Replies)
Greetings!
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Hi All
I am creating a makefile and I want to do a clean section.
In the clean section I would like to check if the file exists and then delete it.
I always have an error 'unexpected end of file'
What's wrong in it?
Thanks
msntn
firstCpp: first.cpp
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clean:
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