[CentOS] scary messages from autoconf

Michael Hennebry hennebry at web.cs.ndsu.nodak.edu
Tue Nov 27 18:17:07 UTC 2012


On Tue, 27 Nov 2012, m.roth at 5-cent.us wrote:

> Michael Hennebry wrote:
> <snip>
>> 'Twould be nice just to know what the messages mean.
>> I get the impression that output like this are indications of a problem
>> that
>> is not specific to the particular software that I was trying to compile:
>> autoconf wrote:
>>> checking for stdint.h... (cached) yes
>>> checking limits.h usability... yes
>>> checking limits.h presence... no
>>> configure: WARNING: limits.h: accepted by the compiler, rejected by the
>>> preprocessor!
>>> configure: WARNING: limits.h: proceeding with the compiler's result
>>> checking for limits.h... yes
>>> checking for unistd.h... (cached) yes
>>> checking sys/time.h usability... yes
>>
>> limits.h:
>> usable, not present, accepted by the compiler, rejected by the
>> preprocessor.
>>
>> Huh?
>
> Here's a question: *which* limits.h? On my 6.3 system, if I locate
> limits.h, I get:
> /usr/include/limits.h
> /usr/include/c++/4.4.4/tr1/limits.h
> /usr/include/linux/limits.h
> /usr/lib/gcc/x86_64-redhat-linux/4.4.4/include/limits.h
> /usr/lib/gcc/x86_64-redhat-linux/4.4.4/include/syslimits.h
> /usr/share/doc/pam-1.1.1/html/sag-pam_limits.html
> /usr/share/man/man0p/limits.h.0p.gz
> /usr/src/kernels/2.6.32-279.1.1.el6.x86_64/include/linux/limits.h
> /usr/src/kernels/2.6.32-279.11.1.el6.x86_64/include/linux/limits.h
> /usr/src/kernels/2.6.32-279.2.1.el6.x86_64/include/linux/limits.h
> /usr/src/kernels/2.6.32-279.5.2.el6.x86_64/include/linux/limits.h
> /usr/src/kernels/2.6.32-279.9.1.el6.x86_64/include/linux/limits.h

Don't know for sure.
I have even more.
>From experiment, gcc and cpp search the same directories:
  /usr/local/include
  /usr/lib/gcc/i686-redhat-linux/4.4.6/include
  /usr/include

/usr/local/include does not have a limits.h .
/usr/lib/gcc/i686-redhat-linux/4.4.6/include/limits.h
has a #include_next <limits.h> that grabs /usr/include/limits.h .

-- 
Michael   hennebry at web.cs.ndsu.NoDak.edu
"On Monday, I'm gonna have to tell my kindergarten class,
whom I teach not to run with scissors,
that my fiance ran me through with a broadsword."  --  Lily


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