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Ticket 195: Correctly detect FD_SETSIZE even on AIX.

Hi Ralf!

On AIX I do encounter this compilation error:

  ./libtool --mode=compile --quiet powerpc-ibm-aix7.1.0.0-gcc -c -I. -O2 -pipe pth_debug.c
  In file included from pth_p.h.in:54,
                   from pth_debug.c:29:
  pth.h:93:2: error: #error "FD_SETSIZE is larger than what GNU Pth can handle."
  Makefile:154: recipe for target 'pth_debug.lo' failed
  make: *** [pth_debug.lo] Error 1

Ok, AIX defines this one:

  $ grep 'define *FD_SETSIZE' /usr/include/sys/*.h
  /usr/include/sys/time.h:#define FD_SETSIZE     65534

Wondering what the relevant configure part was:

  checking for default value of FD_SETSIZE... 1024

And in config.log:

  configure:19255: checking for default value of FD_SETSIZE
  configure:19286: powerpc-ibm-aix7.1.0.0-gcc -o conftest  -O2 -pipe   conftest.c  >&5
  conftest.c: In function 'main':
  conftest.c:53: error: 'fd_set' undeclared (first use in this function)
  conftest.c:53: error: (Each undeclared identifier is reported only once
  conftest.c:53: error: for each function it appears in.)
  conftest.c:56: warning: incompatible implicit declaration of built-in function 'exit'
  configure:19286: $? = 1
  configure: program exited with status 1

Ok, fixing these both problems (error and warning) with this diff:

  --- pth-2.0.7/aclocal.m4
  +++ pth-2.0.7/aclocal.m4
  @@ -1185,7 +1185,9 @@
   changequote(<<, >>)dnl
   <<
   #include <stdio.h>
  +#include <stdlib.h>
   #include <sys/types.h>
  +#include <sys/time.h>
   #include <unistd.h>
   int main(int argc, char *argv[])
   {

After promoting this patch to configure, the relevant line reads:

  checking for default value of FD_SETSIZE... 65534

and the compilation succeeds. Also, 'make test' tells this result now:

  Pth: OK: powerpc-ibm-aix7.1.0.0 | mcsc/sc/mc | down | 2.0.7

Thank you! /haubi/

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Properties:

Type:	code		Version:	2.0.7
Status:	new		Created:	2013-Nov-29 16:21
Severity:	2		Last Change:	2013-Nov-29 16:21
Priority:	3		Subsystem:	pth
Assigned To:	rse		Derived From:
Creator:	anonymous