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
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