Re: What is "ac_nonexistent.h"?

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On 03/07/2011 04:42 AM, ÑîÓÂÓÂ wrote:
> Hi, guys.
> I'm new to Autoconf.
> Recently I wrote an very, very simple example of using autotools. The example worked OK(all worked OK, including generated Makefiles). But when I added macro AC_CHECK_HEADERS([...]) and it went well to generate configure shell script.
> So I ran ./configure, it's OK! Still I checked config.log, and found there is an error showing:
> "error: ac_nonexistent.h, no such file or directory."
> ...
> "Compilation terminated."
> Fortunately that is the only error which appeared several times in the config.log file.

That's a _good_ thing.  We _expect_ that compilation error, to prove
that we are correctly detecting how your compiler detects and rejects
broken source code that refers to a non-existent header (knowing how the
compiler detects missing headers is essential for later tests of
AC_CHECK_HEADERS to see which headers are present).

Not all failed compilations are bugs.

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

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