Re: [Bug-gsl] `fprnd_t' undeclared - can't this be solved with autoconf?

[Dr. David Kirkby]

On 10/12/10 03:05 PM, Brian Gough wrote:
> At Tue, 28 Sep 2010 02:27:10 +0100,
> Dr. David Kirkby wrote:
> > That is enough to get the code to compile on AIX 5.3, but it is not building the
> > library properly - see below. I'm pretty new to AIX, so don't have a lot of
> > experience in knowing what these errors might be.
>
> I'm happy to apply a patch for that if you have one. If it is mostly
> in fp-aix.c it shouldn't affect anything else.
>
> > Have you see these sorts of errors on other platforms, and might have a clue
> > what they mean?
>
> I've never seen that error before.
>
> > ld: 0711-593 SEVERE ERROR: Symbol C_BSTAT (entry 635) in object siman_tsp.o:
> >           The symbol refers to a csect with symbol number 0, which was not
> >           found. The new symbol cannot be associated with a csect and
> >           is being ignored.


Give me a day or two. I'll fire up the AIX box and give you a patch which will 
allow gsl to compile, but not link.

I suspect the linking problem is nothing to do with GSL, as I've seen similar 
issues on other things.

FWIW, I asked on the autconf mailing list if the way to check for "fprnd_t" was

AC_CHECK_DECLS(fprnd_t,,,[#include <float.h>])

which is the way it's done in your configure.ac for similar things. The reply I 
got was:

======= From autoconf mailing list. =================
Get in the habit of proper m4 quoting:

AC_CHECK_DECLS([fprnd_t],,,[[#include <float.h>]])

(the last argument is double-quoted because it is a literal string with no m4 
macro contents, and because it contains a # which can cause problems in various 
other macros when not double-quoted, even if AC_CHECK_DECLS is immune to those 
problems).
================================================

So basically the only changes are to add

1) Add
AC_CHECK_DECLS([fprnd_t],,,[[#include <float.h>]])
to configure.ac

2) Stuff a few things in fp-aix.c which just define about 4 things if they are 
not already defined. The definitions I took from the /usr/include/float.h from 
my RS/6000 which as I said runs AIX 5.3.


Dave