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Re: [Vincent Lefevre] Bug#325866: autoconf: AC_COMPILE_IFELSE generates

From: Vincent Lefevre
Subject: Re: [Vincent Lefevre] Bug#325866: autoconf: AC_COMPILE_IFELSE generates a test that doesn't work on IRIX64
Date: Fri, 2 Sep 2005 08:17:51 +0200
User-agent: Mutt/1.5.10-vl-20050813i

On 2005-09-01 12:58:40 -0700, Noah Misch wrote:
> In Autoconf itself, we often eschew #error in favor of `choke me'
> inside the #ifdef, which yields a syntactically invalid compilation
> unit. Autoconf users can do the same in their own tests like this
> one, and that should avoid the problem with this compiler.

Yes, I did something like that.

> Perhaps you could post the version string from that compiler, so we
> can document this problem with a specific reference?

demon ~ % cc -version
MIPSpro Compilers: Version

> It would be nice to handle this automatically, but I doubt we could
> do so without breaking something elsewhere. Ralf has more experience
> with matters like this one, and he mentioned some of the major
> obstacles to a reliable implementation.

Would grepping "^  #error directive:" break anything elsewhere?

Vincent Lefèvre <address@hidden> - Web: <>
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Work: CR INRIA - computer arithmetic / SPACES project at LORIA

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