Re: Present-But-Cannot-Be-Compiled bug

[Eric Blake]

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Please don't top-post on technical lists.

According to Jorma Karvonen on 10/16/2009 12:59 PM:
> checking whether gettimeofday clobbers localtime buffer... yes
> checking sys/timeb.h usability... no
> checking sys/timeb.h presence... yes
> configure: WARNING: sys/timeb.h: present but cannot be compiled
> configure: WARNING: sys/timeb.h:     check for missing prerequisite headers?
> configure: WARNING: sys/timeb.h: see the Autoconf documentation
> configure: WARNING: sys/timeb.h:     section "Present But Cannot Be Compiled"
> configure: WARNING: sys/timeb.h: proceeding with the compiler's result

Looking more at your config.log, I see:

> configure:14781: checking sys/timeb.h usability
> configure:14781: gcc -std=gnu99 -c -g -O2  conftest.c >&5
> In file included from /usr/include/stdio.h:34,
>                  from conftest.c:136:
> /usr/local/lib/gcc/i686-pc-linux-gnu/4.3.4/include/stddef.h:214: error: 
> duplicate 'unsigned'
> /usr/local/lib/gcc/i686-pc-linux-gnu/4.3.4/include/stddef.h:214: error: two 
> or more data types in declaration specifiers
> In file included from /usr/include/inttypes.h:28,
>                  from conftest.c:161:
> /usr/include/stdint.h:139: error: 'long long long' is too long for GCC
> /usr/include/stdint.h:139: error: 'long long long' is too long for GCC

What is at line 214 of that stddef.h file, and line 139 of stdint.h?  It
might be a macro being previously (but incorrectly) redefined by
configure?  This may also be a case where your system headers came from a
different version of glibc and gcc than what you are now using, so that
there are some unexpected conflicts due to newer semantics of an updated
compiler.

> 
> I will email config.log to you only Eric with my next email.

Sorry - I saw that mail before this one, so my response to that mail was
lacking this context.  This mail certainly fills in some of the gaps that
I wasn't seeing in the other one.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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