add LICENSE and Makefile

1 files changed, 25 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..fa58aa4
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,25 @@
+# gridcal - compute great-circle distance between two grid locators 
+.POSIX:
+
+SRC = gridcal.c 
+OBJ = ${SRC:.c=.o}
+
+all: options gridcal 
+
+options:
+	@echo "-+- build options -+-"
+	@echo "PREFIX  = ${PREFIX}"
+	@echo "CFLAGS  = ${CFLAGS}"
+	@echo "LDFLAGS = ${LDFLAGS}"
+	@echo "CC      = ${CC}"
+	@echo "-+-+-+-+-+-+-+-+-+-+-" 
+
+gridcal: ${OBJ}
+	$(CC) $(LDFLAGS) -o $@ $(OBJ) -lm
+
+debug: clean
+	${MAKE} CFLAGS="${DEBUG}" all
+
+clean:
+	rm -f gridcal ${OBJ}
+