Can't you test for that at run-time? I.e., can't you do the configure-time test to see if AF_IB exists, and if it does, do a run-time check to see if it's useful/supported in the kernel? Or is there a reason not to do this (e.g., it would impose a performance penalty at run time because the check would need to be in the performance-critical code path)?
On Mar 2, 2014, at 11:02 PM, Vasily Filipov <vas...@dev.mellanox.co.il> wrote: > some additional explanation - it could be a situation when AF_IB is defined > in user space but kernel doesn't support it. > > On 03-Mar-14 08:53, Vasily Filipov wrote: >> Hi Jeff, >> I've committed the fixes (r30905). It is a problem to detect kernel >> defines (such as AF_IB ), so we have to use AC_RUN_IFELSE macro. >> >> Thanks, >> Vasily. >> >> On 27-Feb-14 17:09, Jeff Squyres (jsquyres) wrote: >>> I'm seeing this warning this morning: >>> >>> ----- >>> configure.ac:1139: warning: AC_RUN_IFELSE called without default to allow >>> cross c\ >>> ompiling >>> ../../lib/autoconf/general.m4:2748: AC_RUN_IFELSE is expanded from... >>> ../../lib/m4sugar/m4sh.m4:639: AS_IF is expanded from... >>> ompi/mca/btl/openib/configure.m4:37: MCA_ompi_btl_openib_CONFIG is expanded >>> from.\ >>> .. >>> config/ompi_mca.m4:571: MCA_CONFIGURE_M4_CONFIG_COMPONENT is expanded >>> from... >>> config/ompi_mca.m4:352: MCA_CONFIGURE_FRAMEWORK is expanded from... >>> config/ompi_mca.m4:252: MCA_CONFIGURE_PROJECT is expanded from... >>> config/ompi_mca.m4:39: OMPI_MCA is expanded from... >>> configure.ac:1139: the top level >>> ----- >>> >>> Is it necessary to AC_RUN_IFELSE here? Is AC_CHECK_DECLS not sufficient >>> for some reason? >>> >>> It strikes me that this test you currently have in configure.m4 really >>> should be a run-time test, and that all you need in configure.m4 should be >>> an AC_CHECK_DECLS to see if AF_IB exists. >>> >> > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
