mkenvimage: Add version info switch (-V)

Signed-off-by: Horst Kronstorfer <hkronsto@frequentis.com>

tools/mkenvimage.c

@@ -36,6 +36,7 @@
 #include <sys/stat.h>
 
 #include <u-boot/crc.h>
+#include <version.h>
 
 #define CRC_SIZE sizeof(uint32_t)
 
@@ -56,6 +57,7 @@ static void usage(const char *exec_name)
 	       "\t-b : the target is big endian (default is little endian)\n"
 	       "\t-p <byte> : fill the image with <byte> bytes instead of "
 	       "0xff bytes\n"
+	       "\t-V : print version information and exit\n"
 	       "\n"
 	       "If the input file is \"-\", data is read from standard input\n",
 	       exec_name);
@@ -84,7 +86,7 @@ int main(int argc, char **argv)
 	opterr = 0;
 
 	/* Parse the cmdline */
-	while ((option = getopt(argc, argv, ":s:o:rbp:h")) != -1) {
+	while ((option = getopt(argc, argv, ":s:o:rbp:hV")) != -1) {
 		switch (option) {
 		case 's':
 			datasize = strtol(optarg, NULL, 0);
@@ -109,6 +111,9 @@ int main(int argc, char **argv)
 		case 'h':
 			usage(argv[0]);
 			return EXIT_SUCCESS;
+		case 'V':
+			printf("%s version %s\n", prg, PLAIN_VERSION);
+			return EXIT_SUCCESS;
 		case ':':
 			fprintf(stderr, "Missing argument for option -%c\n",
 				optopt);