Add version number

Makefile

@@ -1,12 +1,13 @@
+PREFIX = /usr/local
+VERSION = 0.1
+
 SRC = minrss.c util.c net.c xml.c
 OBJ =  $(SRC:.c=.o)
 CC = cc
 INCS =
 LIBS = -lcurl -I/usr/include/libxml2 -lxml2 -lm
 WARN = -Wall -Wpedantic -Wextra
-CFLAGS = $(LIBS) $(INCS) $(WARN)
-
-PREFIX = /usr/local
+CFLAGS = $(LIBS) $(INCS) $(WARN) -DVERSION=\"$(VERSION)\"
 
 all: config.h minrss
 

minrss.c

@@ -76,8 +76,13 @@ finish(char *url, long responseCode)
 }
 
 int
-main()
+main(int argc, char  *argv[])
 {
+	if (argc == 2 && !strcmp("-v", argv[1]))
+		logMsg(0, "MinRSS %s\n", VERSION);
+	else if (argc != 1)
+		logMsg(0, "Usage: minrss [-v]\n");
+
     unsigned int i = 0;
 
     initCurl();