[OT] C preprocessor help - trying to build an XS module.

BrowserUk has asked for the wisdom of the Perl Monks concerning the following question:

Has anyone encountered, or hazard a guess at the purpose of, the #define __P I found in a header file:

#undef __P
#define    __P(protos)    protos

... 
// all functions defined as
char *func __P((int *, int *, int *));
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With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

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Re: [OT] C preprocessor help - trying to build an XS module. by Marshall (Canon) on Oct 31, 2011 at 17:59 UTC
Ooooh, I think this some ancient baggage that keeps getting schlepped around. This note from history may be useful. Evidently this has to do with compatibility with very ancient K&R? If I'm wrong, well Ooops!	[reply]
Re^2: [OT] C preprocessor help - trying to build an XS module. by BrowserUk (Patriarch) on Oct 31, 2011 at 18:14 UTC
Yep! That's seems to be it. Thanks. With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply]