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Re: AC_CHECK_FUNCS(sigsetjmp)

From: Keith MARSHALL
Subject: Re: AC_CHECK_FUNCS(sigsetjmp)
Date: Fri, 28 Jul 2006 12:04:57 +0100

Thomas Dickey wrote, quoting Eric Blake:
>> Have you tried AC_CHECK_DECLS instead?  You really are checking
>> whether sigsetjmp is declared and you can compile with it, not
>> whether it is a function and you can link with it.
> But supposing that I wanted to pass around a pointer to it, that
> wouldn't help much.

How do you pass around a pointer to an entity which is implemented
as a preprocessor macro?
| The ISO C standard specifies various restrictions on the usage of
| the setjmp() macro in order to permit implementors to recognize
| the name in the compiler and not implement an actual function.
| These same restrictions apply to the sigsetjmp() macro.


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