On 03/18/2013 02:50 AM, Jan van Dijk wrote: > Would it be possible to provide a new macro AC_WHICH_HEADER, say, which > informs it user what header has been/will be picked up by the preprocessor?
I'm not sure that it is a common enough action to need to know where a header lives. Knowing that a particular spelling for an include name compiled should generally be enough. That said, check out gnulib's m4/absolute-header.m4, which is about as portable as you can get across multiple compilers at determining the absolute name for any header's location, provided that header had some non-trivial content after pre-processing (so headers like <assert.h> cannot always be found, but headers like <stdio.h> are fair game). http://git.sv.gnu.org/cgit/gnulib.git/tree/m4/absolute-header.m4 -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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