Re: suppress "target '*' given more than once in the same rule"

Renaud Pacalet <[email protected]> Wed, 26 Jun 2024 15:38:53 +0200

Newsgroups	gmane.comp.gnu.make.general
Organization	Telecom ParisTech
Message-ID	<[email protected]>


On 6/25/24 18:03, Belliveau, Fran - 0666 - MITLL wrote:
> I have a setup where I use include directives to access makefile content used by multiple “make” situations throughout a large project.
> 
> As I try to replace a bunch of (heavily simplified) things like:
> 
> FOO_DIR?=fd
> BAH_DIR?=bd
> ####
> $(FOO_DIR)/foo: $(F_HDRS)
> mkdir -p $(FOO_DIR)
> genF $@
> 
> $(BAH_DIR)/foo: $(B_HDRS)
> mkdir -p $(BAH_DIR)
> genB $@
> 
> with a something like
> 
> ####
> $(FOO_DIR) $(BAH_DIR):
> mkdir -p $@
> 
> $(FOO_DIR)/foo: $(HDRS) | $(FOO_DIR)
> gen $@
> 
> $(BAH_DIR)/bah: $(B_HDRS) | $(BAH_DIR)
> genB $@
> 
> I run into “make complaints” when multiple directory variables actually point to the same directory.
> This may just be a warning, but it looks like an error to those who do not know what is going on.
> 
> I am wondering if there is a way to suppress this with a directive of some sort?
> Is there a function call I might be able to make like $(unique $(FOO_DIR) $(BAH_DIR)): ?

$(sort $(FOO_DIR) $(BAH_DIR)); it sorts (in your case you don't care) and removes duplicates.

> 
> 
> Francis Belliveau
> Consultant
> Lincoln Laboratory, Massachusetts Institute of Technology
> 244 Wood Street
> Lexington, MA 02421-6426
> 
> 
> 

-- 
Renaud Pacalet
Télécom Paris
Campus SophiaTech
450 Route des Chappes, CS 50193
06904 Biot Sophia Antipolis cedex, FRANCE
Tel : +33 (0) 4 9300 8402
Web : http://www.telecom-paris.fr/

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