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Re: flymake support in gnulib

From: Ralf Wildenhues
Subject: Re: flymake support in gnulib
Date: Sun, 22 May 2011 15:34:50 +0200

Hi Reuben,

* Reuben Thomas wrote on Fri, May 20, 2011 at 11:32:29PM CEST:
> I've just been playing with flymake. To make it work at all I copied
> the following rule into my src/Makefile.am from the flymake manual:
> check-syntax:
>       gcc -o nul -S ${CHK_SOURCES}
> It would be nice to put this in maint.mk, but then it wouldn't be
> picked up by make in src/, only at the top-level, which doesn't work
> with flymake (by default). Suggestions?
> The first error I noticed was that config.h was not found. There are
> two obvious ways to fix this. The first is to implement a dumpvars
> target, so that flymake-get-project-include-dirs-tmp works. This
> appears to be undocumented in the flymake manual, but it just tries to
> run:
> dumpvars:
>       echo -e $(foreach var, ${DUMPVARS}, "\n$(var)=$($(var))")
> seems to produce the required output, but, because it uses a GNU Make
> feature, isn't accepted by automake,

Why should this rule not be accepted by automake?  Just turn off the
warning about non-portable make constructs.

Other than that, -e is not portable for echo, and I'm sure there are
other ways to transport an include directory list into the tool.
http://www.emacswiki.org/emacs/FlyMake has suggestions.
Haven't tried them, however.

> so has to be in cfg.mk/maint.mk,
> and hence isn't available to flymake by default.

Ralf :wq

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