How can I determine if a function is available?

[Landon Fuller]

On Apr 9, 2007, at 12:46 AM, Ryan Schmidt wrote:

> My preliminary patch for php5 is attached to this ticket:
>
> https://trac.macosforge.org/projects/macports/ticket/8599
>
> However I still need a fix that will let it work with either MP  
> 1.4.0 or trunk.
>
> Also would like advice regarding any ways to reduce the size of the  
> patch. I'm concerned about the duplication of the apache, apache2  
> and fastcgi options. You'll see what I mean if you look in the  
> patch...

Is there any way to do this by patching php5's build system? That was  
the simple fix for the zlib port.
command/command_exec/et al should probably remain internal API.

-landonf
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