gcc -I/usr/X11R6/include -c filename.c
gcc -L/usr/X11R6/lib filename.o -o filename -lX11
とする。以下は、Makefileの例：
INCLUDE = /usr/X11R6/include
LIB = /usr/X11R6/lib
sorg: sorg.o sorgar.o rsgraph3.o
g++ -L${LIB} sorg.o sorgar.o rsgraph3.o -o sorg -lm -lX11
sorg_new: sorg_new.o sorgar.o rsgraph3.o
g++ -L${LIB} sorg_new.o sorgar.o rsgraph3.o -o sorg_new -lm -lX11
sorg.o:sorg.c sorgar.h rsgraph3.h
g++ -I${INCLUDE} -c sorg.c
sorg_new.o: sorg_new.c sorgar.h rsgraph3.h
g++ -I${INCLUDE} -c sorg_new.c
sorgar.o:sorgar.c sorgar.h
g++ -c sorgar.c
rsgraph3.o:rsgraph3.c
g++ -I${INCLUDE} -c rsgraph3.c
