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Re: sub makefile does not use correct value of CFLAGS from top make file
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From: |
Jeffrey Walton |
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Subject: |
Re: sub makefile does not use correct value of CFLAGS from top make file, |
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Date: |
Fri, 3 Sep 2021 22:54:25 -0400 |
On Fri, Sep 3, 2021 at 5:58 PM Jeffrey.Fellin--- via Bug reports and
discussion for GNU make <bug-make@gnu.org> wrote:
>
> I have a project that compiles .S and .c files, and the value of CFLAGS in
> the sub makefile is not the same for the compile lines
> ...
> The compile of bug.S succeeds, but doesn’t have the correct value of CFLAGS,
> as in the annotated output below. The compile of hello.c has the correct
> value of CFLAGS, but the compile fails due to the unsupported options to the
> cc. The extra options are for use by the project specific compiler.
I believe you should use ASFLAGS for assembly source, not CFLAGS.
Also see "Variables Used by Implicit Rules"
(https://ftp.gnu.org/old-gnu/Manuals/make-3.79.1/html_node/make_97.html)
in the manual.
Jeff