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Re: [Vincent Lefevre] Bug#325866: autoconf: AC_COMPILE_IFELSE generates
From: |
Paul Eggert |
Subject: |
Re: [Vincent Lefevre] Bug#325866: autoconf: AC_COMPILE_IFELSE generates a test that doesn't work on IRIX64 |
Date: |
Thu, 01 Sep 2005 15:46:54 -0700 |
User-agent: |
Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux) |
Ben Pfaff <address@hidden> writes:
> AC_COMPILE_IFELSE generates a test that only checks the exit status
> of the compiler command. But this is not sufficient:
My own feeling is that if the compiler exits with a nonzero status
and produces working object code, then it succeeded, regardless of
what diagnostics it produced.
Hmm, are you using #error to detect whether some preprocessor problem
exists? If so, then you should redo your test programs so that they
look something like this instead. That should fix the problem.
#ifdef FOO
error: "FOO" was defined.
#endif
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Paul Eggert <=