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Re: flymake support in gnulib

From: Eric Blake
Subject: Re: flymake support in gnulib
Date: Fri, 20 May 2011 16:02:49 -0600
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110428 Fedora/3.1.10-1.fc14 Lightning/1.0b3pre Mnenhy/0.8.3 Thunderbird/3.1.10

On 05/20/2011 03:32 PM, Reuben Thomas wrote:
> 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}

> Secondly, the -o nul option to gcc seems to be an
> undocumented-but-widely-used trick to get gcc not to output the
> results of the compilation. Any observations on this before I write a
> bug report suggesting it be documented? (Generally I find writing gcc
> and glibc bug reports without help a waste of time (above my pay
> grade, as it were).)

nul does not work anywhere besides Windows; elsewhere it is spelled
/dev/null.  This is a fundamental manner of how the null device works
(once you spell its name correctly).  That is, pretty much all compilers
should support '-o /dev/null' as a way to suppress an object file, so I
don't think this is an undocumented gcc feature.

As for the rest of your questions, I'm not familiar enough with flymake
to give a good answer.

Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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