Re: Include sysdep.h before stdio.h in ldlex.c

[Nick Clifton <nickc at redhat dot com>]

Hi Richard,

> The attached patch is a bit ugly, but it does fix the problem.
> Better suggestions welcome!

Isn't this a generic problem for any AIX compiled program that uses flex 
and large files ?  If so, I wonder if someone has developed a less clunk 
workaround ?

> Tested on powerpc-ibm-aix5.3.0 and x86_64-linux-gnu.  OK to apply
> to trunk and branch?

I think that you ought to add a comment to ldlex-wrapper.c explaining 
why it is needed.  Otherwise someone might be tempted to come along and 
delete it.

Ralf also pointed out that:

> This will create ldlex-wrapper.o, not ldlex.o, for compilers other than
> GCC.  I'm not sure whether this code still needs to be portable to
> compilers that don't understand '-c -o', but if it does, then possible
> ways out are either: add AM_PROG_CC_C_O to configure.in, or rename the
> input file so that the object matches the source file with s/\.c$/.o/.
> If not (i.e., it is fine to assume that '-c -o' works), then adding -o
> $@ right after -c should work.  (The ordering helps depcomp.)

My feeling is that adding AM_PROG_CC_C_O would be the best option. 
Assuming of course that the AIX native compiler supports -c -o.  What do 
you think ?

Cheers
  Nick