On 09 Nov 2014 22:06, Patrick Doyle wrote: > I am very new to developing autotools maintained projects, but like (a > lot) what I've read so far. So, I would like to use autotools on > projects going forward, but have a large body of legacy code to > maintain. I would like to reference an include directory from some of > that legacy code in my new, autotools maintained, program. > > What is the best way to do this? Is there an existing macro I can use > to say "Search the filesystem for somedir/custominclude.h and add > -Isomedir to CFLAGS"? > > I know I can write a custom macro, or just plain m4sh code myself, to > do this (once I learn a little more), but I figured I should ask if > this has already been done. > > Thanks for any pointers you care to give me... preprocess flags (like -I) go in CPPFLAGS, not CFLAGS/CXXFLAGS if you're just using autoconf, you can merely append CPPFLAGS: CPPFLAGS="$CPPFLAGS -Ifoo" however, assuming you're trying to use a source or build directory, you should do it in your automake files instead so you can leverage $(top_srcdir) and $(top_builddir). see this page for details: http://www.gnu.org/software/automake/manual/html_node/Program-Variables.html#Program-Variables -mike
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