On 01/23/2014 02:42 AM, Darrell Anderson wrote: I have spent hours looking at preprocessor directives and I still don't know how we could fined a check to work that would test for a specific version of libcdio and libcdio-paranoia. With gcc, and others with standard pre-defined macros, then a test is relatively easy, but I can't find a preprocessor check that says "hey, check package X and see if it is at least version Y". There are pkgconfig files for libcdio_cdda and libcdio_paranoia: /usr/lib/pkgconfig/libcdio_cdda.pc /usr/lib/pkgconfig/libcdio_paranoia.pc They include: 08:37 phoinix:/dat_e/ch14/david/usr/include/cdio> cat ../../lib/pkgconfig/libcdio_cdda.pc prefix=/usr exec_prefix=${prefix} libdir=${exec_prefix}/lib includedir=${prefix}/include Name: libcdio_cdda Description: CD paranoia CD-DA library from libcdio Version: 10.2+0.90+1 Requires: libcdio Libs: -L${libdir} -lcdio_cdda -lcdio -lm Cflags: -I${includedir} 08:37 phoinix:/dat_e/ch14/david/usr/include/cdio> cat ../../lib/pkgconfig/libcdio_paranoia.pc prefix=/usr exec_prefix=${prefix} libdir=${exec_prefix}/lib includedir=${prefix}/include Name: libcdio_paranoia Description: CD paranoia library from libcdio Version: 10.2+0.90+1 Requires: libcdio Libs: -L${libdir} -lcdio_paranoia -lcdio_cdda -lcdio Cflags: -I${includedir} Now I have no idea how to hack autotool files. Since there are pkgconfig files, doing it should not be that hard, but other than starting reading the "Gnu Autotools Manual", I don't have any quick and dirty reference. Any ideas? -- David C. Rankin, J.D.,P.E.