On 0512T0631, Ralf Corsepius wrote: > > I need the configure script to figure out how many parameters one particular > > library function requires, due to API change. I've found a macro to do that, > > it looks like this: > > > > AC_DEFUN([AC_JACK_MIDI_NFRAMES_CHECK], [ > > AC_MSG_CHECKING([whether JACK MIDI functions need nframes parameter]) > > AC_LANG_PUSH(C) > > AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[ > > #include <jack/jack.h> > > #include <jack/midiport.h> > > ]], [[ > > jack_midi_event_get(0, 0, 0, 0); > > ]]), [jackmidi_nframes='yes'], [jackmidi_nframes='no']) > > AC_MSG_RESULT([$jackmidi_nframes]) > > AC_LANG_POP() > > ]) > > > > Problem is, it does not work for me. Probable reason is this > > (from config.log): > > > > configure:5138: checking whether JACK MIDI functions need nframes parameter > > configure:5172: gcc -c -g -O2 conftest.c >&5 > > conftest.c:32:23: error: jack/jack.h: No such file or directory > > conftest.c:33:27: error: jack/midiport.h: No such file or directory > > > > It does not work, because it does not use the proper CFLAGS - this > > is FreeBSD, includes live in /usr/local/include and it's neccessary > > to pass -I/usr/local/include. > Are you saying, they modified their GCC in such a way that it doesn't > look into /usr/local/include? Yes, it seems so. > GCC's default behavior is to > use /usr/local/include implicitly, as part of GCC's system-include path, > in a similar way it treats /usr/include. What about systems that put external libraries somewhere under /opt or /usr/pkg? > > So, the question is, how to modify the above macro to use CFLAGS it got > > (or should got) from pkg-config, for example? > You should not do this. Instead, the user/installer is supposed to pass > appropriate *FLAGS to configure. > > In your case (include-paths): ..../configure CPPFLAGS="-I<foo>/include" I see. Anyway, I managed to work around that problem by checking for the particular version of library using PKG_CHECK_MODULES. Thanks ;-) -- If you cut off my head, what would I say? Me and my head, or me and my body? _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
