[libdispatch-dev] [PATCH] define autoconf macros to 1

Robert Watson robert at fledge.watson.org
Mon Nov 2 03:28:41 PST 2009

On Sat, 31 Oct 2009, Paolo Bonzini wrote:

>> As I understand it, some of this is simply a feature of the way autoconf 
>> works: AC_CHECK_DECLS(), used for testing macros, checks conditionally 
>> define HAVE_DECL_foo, whereas functional checks, such as AC_CHECK_FUNCS(), 
>> used for testing for functions, defines HAVE_foo unconditionally but with a 
>> value of 0 or 1.  I'd be quite happy to learn about ways to avoid this 
>> happening. :-)
> I think Kevin was thinking more of these.

I've merged (pretty much) this patch as r83, although I also used defines of 
'1' in the previous revision, r82, that attempts to move policy for selecting 
the semaphore implementation into configure.ac from the C source.


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