Re: Constants

On 2010-01-04 20:36:55, Chris Robinson wrote:
> On Monday 04 January 2010 7:16:41 pm 

> A cross-compiler should produce code that is compatible with the target 
> system, not the host. If Windows specifies an enum being one value, and Linux 
> uses another, for example, then both MinGW on Windows and MinGW on Linux would 
> produce code according to what Windows says the value is. There'd be no 
> problem cross-compiling an OpenAL app for Win32 if Win32 uses different 
> constant values, as long as the cross-compiler is using proper Windows-based 
> headers.

'Lo,

What I meant was:

Assume I need to find the value of a constant at library compile time (when I
compile my language bindings). I might have a program in the build that does
something like:

al_format_mono8.c:

#include <stdio.h>
#include <AL/al.h>

int
main (void)
{
  printf ("AL_FORMAT_MONO8 %lu\n", AL_FORMAT_MONO8);
  return 0;
}

al_format_mono8: al_format_mono8.c
  cc -o al_format_mono8 al_format_mono8.c

constants.dat: al_format_mono8
  ./al_format_mono8 > constants.dat

This obviously wouldn't be possible if cross compiling as it wouldn't be
possible to run the compiled al_format_mono8 program (and if it was compiled
to run on the host, it might produce the wrong value if the host al.h and
target al.h differed in that respect).

M
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