When CONFIG_FIT_SIGNATURE=n the signing options are not available. If a
user is careful they will notice this when looking at the help output.

If they are not careful they will waste several hours wondering why
their FIT doesn't contain a /signature node, as mkimage will silently
ingore the signing related options.

Make it obvious that the commands don't work by removing them from the
getopt opt_string.

 $ mkimage -f machine.its -k keys -K u-boot-pubkey.dtb -r image.fit
 mkimage: invalid option -- 'k'
 Error: Invalid option

Signed-off-by: Joel Stanley <[email protected]>
--
v2: Leave padding related options in the CONFIG_FIT_SIGNATURE=y optargs
---
 tools/mkimage.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/mkimage.c b/tools/mkimage.c
index 68d5206cb4fd..f7d3ac40e681 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -142,7 +142,11 @@ static int add_content(int type, const char *fname)
        return 0;
 }
 
+#ifdef CONFIG_FIT_SIGNATURE
 #define OPT_STRING "a:A:b:B:c:C:d:D:e:Ef:Fk:i:K:ln:N:p:O:rR:qstT:vVx"
+#else
+#define OPT_STRING "a:A:b:B:C:d:D:e:Ef:i:ln:O:R:qstT:vVx"
+#endif
 static void process_args(int argc, char **argv)
 {
        char *ptr;
@@ -150,8 +154,7 @@ static void process_args(int argc, char **argv)
        char *datafile = NULL;
        int opt;
 
-       while ((opt = getopt(argc, argv,
-                  "a:A:b:B:c:C:d:D:e:Ef:Fk:i:K:ln:N:p:O:rR:qstT:vVx")) != -1) {
+       while ((opt = getopt(argc, argv, OPT_STRING)) != -1) {
                switch (opt) {
                case 'a':
                        params.addr = strtoull(optarg, &ptr, 16);
-- 
2.29.2

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