Re: Compiler error of m4-1.4.13 on AIX using xlc

[Jens Rehsack]

Bruno Haible wrote:
> Eric Blake wrote:
>>>>  CC  strtod.o
>>>> "strtod.c", line 155.17: 1506-045 (S) Undeclared identifier HUGE_VAL.
>>>> "strtod.c", line 170.17: 1506-232 (I) Divisor for modulus or division
>>>> operator cannot be zero.
>>>>
>>>> #include_next "///usr/vac/include/math.h" <-- wrong: must use /usr/include
>>> The problem was easy to fix for the current compilation, but I don't know
>>> how to fix the math.in.h - or if this would be the right file to fix etc.
>> Actually, the fix needs to come from gnulib.  This seems like another case
>> where we are guessing the wrong absolute header to use when installing a
>> replacement for <math.h>, but off-hand I'm not sure how best to fix it.
> 
> I don't know how to deal with this either. I made an attempt to fix this
> problem in [1]. The last mail on this topic was then [2].
> 
> Bruno
> 
> [1] http://lists.gnu.org/archive/html/bug-gnulib/2008-11/msg00294.html

I'm happy to whether it works in next m4 release \o/

> [2] http://lists.gnu.org/archive/html/bug-gnulib/2009-04/msg00201.html

This shouldn't bother you, it's an xlc compiler bug and IBM has to care.
Volker, what do you think regarding this point?

BTW: The xlC-compiler (more: it's header files) on AIX supports a define
_LINUX_SOURCE_COMPAT which enables some linux compatibility behaviour (e.g.
malloc(0) returns a pointer to 0 bytes memory, not just NULL).

Jens