Hi I have some problems with pathes and env. variables. It seems my system get confused and doesn't want in some situations to find libraries or headers elsewhere than /opt/local. here is my profile file: $ cat ~/.profile # # Your previous .profile (if any) is saved as .profile.mpsaved # Setting the path for MacPorts. export PATH=/usr/local/bin:/usr/local/sbin:/opt/local/bin:/opt/local/ sbin:/sw/bin:/sw/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin export C_INCLUDE_PATH=/usr/local/include:/opt/local/include:/sw/ include:/usr/include export LIBRARY_PATH=/usr/local/lib:/opt/local/lib:/sw/lib:/usr/lib I have for instance installed liblrdf in /usr/local and when I want to build Ardour from source (it uses scons instead of ./configure && make) : ardour-2.1 $ scons AUDIOUNITS=1 COREAUDIO=1 GTKOSX=1 FFT_ANALYSIS=1 SURFACES=1 scons: Reading SConscript files ... Checking for pkg-config version >= 0.8.0... yes Checking for gthread-2.0... yes Checking for lrdf... no lrdf >= 0.4.0 not found. You do not have the necessary dependencies required to build ardour Please consult http://ardour.org/building for more information a workaround is to install all dependencies in /opt/local, but I don't like it, and some of them (like JackOSX) cannot be installed elsewhere than /usr/local. I would like to find a system wide way to make any building or configure script look first in /usr/local then in /opt/local to find whatever is needed (libraries or headers). I assue this behaviour should be automatic but it's not, and I've never had this kind of problem on linux. May be this a problem specific to scons ? I've tried to specify CFLAGS : $ CFLAGS="-I/usr/local/include -I/opt/ local/include -I/usr/include" scons but the same error occurs. Rémi Intel Macbook, Leopard 10.5.1