Usefulness of make -t

Usefulness of make -t

[Alejandro Colomar]

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Hi Paul,

Yesterday I found another use of make's -t flag: It helps make sure
that the logic in the Makefile is correct.  You could run the target
without -t, but then you risk seeing warnings and errors from the
commands run by the target before make's own ones, which would hide
Makefile problems.

If you run `make -kstj [target(s)]` after modifying a Makefile, it
will show only and all^Wmost problems in the Makefile itself.  It
could be especially useful with 4.4's --shuffle, although I don't
have it yet in Debian Sid :(.  I should build from source and try it.

I'll start using that as a rule to check changes to Makefiles, and
hopefully will avoid introducing bugs that I need to fix in the next
commit :)

<https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/commit/?id=5bf82f50cf02ded2403666d6c1ee2878b8bd602e>

Cheers,
Alex


-- 
<http://www.alejandro-colomar.es/>
GPG key fingerprint: A9348594CE31283A826FBDD8D57633D441E25BB5

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Re: Usefulness of make -t

[Alejandro Colomar]

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On 4/2/23 14:20, Alejandro Colomar wrote:
> Hi Paul,
> 
> Yesterday I found another use of make's -t flag: It helps make sure
> that the logic in the Makefile is correct.  You could run the target
> without -t, but then you risk seeing warnings and errors from the
> commands run by the target before make's own ones, which would hide
> Makefile problems.
> 
> If you run `make -kstj [target(s)]` after modifying a Makefile, it
> will show only and all^Wmost problems in the Makefile itself.  It
> could be especially useful with 4.4's --shuffle, although I don't
> have it yet in Debian Sid :(.  I should build from source and try it.
> 
> I'll start using that as a rule to check changes to Makefiles, and
> hopefully will avoid introducing bugs that I need to fix in the next
> commit :)
> 
> <https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/commit/?id=5bf82f50cf02ded2403666d6c1ee2878b8bd602e>

Running this a few times works like a charm:

    $ make -kstj --shuffle >/dev/null; make clean >/dev/null

Very recommended :)

> 
> Cheers,
> Alex
> 
> 

-- 
<http://www.alejandro-colomar.es/>
GPG key fingerprint: A9348594CE31283A826FBDD8D57633D441E25BB5

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