Re: Gmake problem when including sub makefiles

[gmake]

On Wed, 16 Aug 2006, Martin Gaarde Lund wrote:

> Im working on a makefile which includes submakefiles which defines various
> targets and variables. This affects my target definitions in a unfortunate
> way.
>
> I have summarized my problem in the following example makefile:
>
> ERRORFILE = $(PROJECT).err
>
> PROJECT = project
>
> test.o:
>   armcc test.c -o test.o --errors $(ERRORFILE)
>
> PROJECT = project1
>
> test1.o:
>   armcc test1.c -o test1.o --errors $(ERRORFILE)
>
> clean:
>   rm *.o
>
>
> > From this example I would have expected make to assemble the following
> target commands:
> armcc test.c -o test.o --errors project.err
> armcc test1.c -o test1.o --errors project1.err
>
> But what i get is:
> armcc test.c -o test.o --errors project1.err
> armcc test1.c -o test1.o --errors project1.err
>
> As it appears the same ERRORFILE applies to both commands.. I realize that
> this is an effect of how make reads through the makefile in different
> stages.
>
> Is it possible to make a construction which works as I intended it to?
>
> Please note that I can not depend on the target rule for defining my error
> output.
>
> Any input will be appreciated, thanks.
>
> /Martin
>
>
> P.S. Im using GNU Make 3.81 built for i686-pc-mingw32

gmake is performing as expected. In rule commands (or whatever the term is),
the last definition in the makefile (or set of makefiles) is the one which
always wins.

You can perform it with per-target definitions:

ERRORFILE = $(PROJECT).err

test.o: PROJECT = project
        armcc test.c -o test.o --errors $(ERRORFILE)

test1.o: PROJECT = project1
        armcc test1.c -o test1.o --errors $(ERRORFILE)

clean:
        rm *.o

Thanks,
Lee