[bug-gawk] gawk-4.0.2 build problem

[Manuel Collado]

The last release gawk-4.0.2 fails to build on the following machine:

$ uname -a
Linux lml 2.6.26-2-amd64 #1 SMP Sun Mar 4 21:48:06 UTC 2012 x86_64 GNU/Linux

I've been told it is a Debian "lenny" Linux distribution.

The error given is:

$ make
     ....
dfa.h:85: error: expected ‘)’ before ‘struct’

Previous gawk versions, up to 4.0.1, build ok. The problem seems to be 
the introduction of the ptrdiff_t type in 4.0.2.

After tweaking a bit the source code, I've found that the problem 
disappears by slightly changing the order of #include(s) in dfa.c.

Instead of (fail)

  #include "dfa.h"
  #include "xalloc.h"

I've used (works)

  #include "xalloc.h"
  #include "dfa.h"

I have little experience with the libc internals. Don't know if this 
patch is safe.

Regards.
--
Manuel Collado - http://lml.ls.fi.upm.es/~mcollado