Disable the present-but-cannot-be-compiled header warning?

[Jeff Squyres]

Is there a way to disable the present-but-cannot-be-compiled header  
warning from AC_CHECK_HEADERS in AC 2.61?  I don't see any mention of  
disabling this warning in either the "Header Present But Cannot Be  
Compiled" or "Generic Header Checks" sections in the 2.61 docs.

I ask because we added some AC_CHECK_HEADERS into our configure.ac  
specifically because we know that there are systems out there that  
have uncompilable headers with some compilers (e.g., some kernel  
header files don't play nicely with non-gnu compilers in 32 bit mode).

All we want is a HAVE_<foo>_H macro (or not) -- our source code can  
react as appropriate (e.g., we can disable the feature that requires  
the <foo> header file).  Specifically: we *don't* want users to report  
this to our mailing list every time it happens:

checking infiniband/driver.h usability... no
checking infiniband/driver.h presence... yes
configure: WARNING: infiniband/driver.h: present but cannot be compiled
configure: WARNING: infiniband/driver.h:     check for missing  
prerequisite headers?
configure: WARNING: infiniband/driver.h: see the Autoconf documentation
configure: WARNING: infiniband/driver.h:     section "Present But  
Cannot Be Compiled"
configure: WARNING: infiniband/driver.h: proceeding with the  
preprocessor's result
configure: WARNING: infiniband/driver.h: in the future, the compiler  
will take precedence
configure: WARNING:     ##  
------------------------------------------------------ ##
configure: WARNING:     ## Report this to http://www.open-mpi.org/community/help/ 
 ##
configure: WARNING:     ##  
------------------------------------------------------ ##

Thanks!

--
Jeff Squyres
Cisco Systems