Re: Fixed-Point toolbox for octave-forge

[Per Persson]

On May 25, 2004, at 17:37, David Bateman wrote:

> Dear All,
>
> I've just committed a fixed-point toolbox for octave to octave-forge.

David,
this is great!

I found three problems when compiling on Mac OS X:

1) A bug in OS X's cmath that causes isnan() and isinf() to be 
"undeclared" will need to be worked around in int/fixed.cc.

The following should work (goes right after #include <cmath>):
#if defined(__APPLE__) && defined(__MACH__)
extern "C" int isnan (double);
extern "C" int isinf (double);
#endif

Maybe configure should test for this bug and define some properly named 
macro?
AC_TRY_COMPILE([#include <cmath>], [isnan(1.0);], 
[AC_MSG_RESULT("Pass")], [AC_MSG_RESULT("Fail")])

2) The link fixed-int.o -> int/fixed.o needs to be before a second 
compile, otherwise ln will cause an error since the link  already 
exist. Optionally, use ln -fs to create the link. Don't know if this is 
OS X specific.

3) The code in example/ won't work as is, because of the way OS X's ld 
works. I'll try and come up with a way to fix this, but it may be a few 
days before I can devote time to this.

After applying (1) and (2) and disabling the example target in 
Makefile, all tests passed.

Again, great stuff! Thanks!

/Per 



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