On 05/18/2013 01:24 PM US Central Time, Jed Brown wrote:

Pavan Balaji <[email protected]> writes:

...

Eh? My point was that if AC_CHECK_DECLS is doing the same thing as PAC_FUNC_NEEDS_DECL, we might be able to discard that macro totally.

Fair enough, it appears to use the even simpler structure:

(void)the_symbol;

is perfectly adequate, but cannot be combined with a link test.

Last time I tried it, it didn't work in some cases. I'll need to go back and look.

HWLOC_CHECK_DECL suffers from the same problem. I don't why AC_CHECK_FUNCS appears to be calling HWLOC_CHECK_DECL, but that is the only occurrence of this "int,long,int,long,..." string in either MPICH or autoconf.

The declaration part of the test was contributed by me to hwloc, because without that the test was not useful in some cases. -- Pavan -- Pavan Balaji http://www.mcs.anl.gov/~balaji