f77 -g -o secondf secondf.o -L/usr/local/mpich/lib/sun4/ch_p4 -lmpi invalid option -L/usr/local/mpich/lib/sun4/ch_p4 ld: -lmpi: No such file or directoryA: This f77 program does not accept the -L command to set the library search path. Some systems provide a shell script for f77 that is very limited in its abilities. To work around this, use the full library path instead of the -L option:
f77 -g -o secondf secondf.o /usr/local/mpich/lib/sun4/ch_p4/libmpi.a
f77 -c secondf.f secondf.f: MAIN main: f77 -o secondf secondf.o -L/home/mpich/lib/solaris/ch_shmem -lmpi Undefined first referenced symbol in file getdomainname /home/mpich/lib/solaris/ch_shmem/libmpi .a(shmempriv.o) ld: fatal: Symbol referencing errors. No output written to secondfThere is no problem with C programs.
A: This means that your C compiler is providing libraries for you that your Fortran compiler is not providing. Find the option for the C compiler and for the Fortran compilers that indicate which library files are being used (alternately, you may find an option such as -dryrun that shows what commands are being used by the compiler). Build a simple C and Fortran program and compare the libraries used (usually on the ld command line). Try the ones that are present for the C compiler and missing for the Fortran compiler.