nickohel <nickohel@xxxxxxxxx> writes: > I 've recently downloaded and installed the opecv library.The problem is > that i cant use any of the library header files because the path the library > is installed is not searched by the gcc for headers.I know i can use the > -idirafter and -I options but i want a way to permantently make gcc look for > headers in the path the library is installed (well actually it's a tree of > paths) .Is there any conf file i must change or a command or something?Any > help is much appreciated. You can set the environment variables CPATH, C_INCLUDE_PATH, and/or CPLUS_INCLUDE_PATH. http://gcc.gnu.org/onlinedocs/gcc-4.1.0/cpp/Environment-Variables.html#Environment-Variables Ian