cc enroll.o lib.o -lmp -o enroll ld:/usr/lib/libmp.a: warning: archive has no table of contents; add one using ranlib(1) cc -O -d2 -c xsend.c "/usr/include/sys/dir.h", line 32: warning: undeclared initializer name DEV_BSIZE "/usr/include/sys/dir.h", line 32: constant expected "xsend.c", line 24: warning: illegal combination of pointer and integer, op = "xsend.c", line 26: warning: struct/union or struct/union pointer required "xsend.c", line 27: warning: illegal combination of pointer and integer, op = "xsend.c", line 35: warning: struct/union or struct/union pointer required *** Error code 1 Stop.