To be updated with current information on architecture under Linux
To access GREG from your Fortran Program, you need to link to several libraries. All GREG libraries are located in $GAG_ROOT/lib where $GAG_ROOT is an environment variable defining where the GILDAS software is located. See your local GILDAS expert for that.
Then you should use the following link command to link your program
f77 -o Program Program.f -L/usr/lib/X11 -L$GAG_ROOT/lib \
-lgdf -lGREG -lcontour -lgtlang -lchar -lsic -limage -lgag -lrary \
-lX11 -lm -lc
where
f77 is the Fortran compiler/linker
Program.f is your Fortran program.
/usr/lib/X11 indicates where the X11 libraries are located
-lm -lc are required on some systems
On some systems, the GREG libraries are shareable, thus avoiding code to
be included in your own programs.