cmdline: fix compilation with -Og

The compilation with gcc-6.3.0 and EXTRA_CFLAGS=-Og gives the following
error:

  CC cmdline_parse.o
  cmdline_parse.c: In function ‘match_inst’:
  cmdline_parse.c:227:5: error: ‘token_p’ may be used uninitialized in
                         this function [-Werror=maybe-uninitialized]
    if (token_p) {
       ^

This is a false positive, gcc is not able to see that we always go in
the loop at least once, initializing token_p.

Fix the warning by initializing token_p to NULL.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_cmdline/cmdline_parse.c b/lib/librte_cmdline/cmdline_parse.c
index 56491ea..3e12ee5 100644 (file)
--- a/lib/librte_cmdline/cmdline_parse.c
+++ b/lib/librte_cmdline/cmdline_parse.c
@@ -163,7 +163,7 @@ static int
 match_inst(cmdline_parse_inst_t *inst, const char *buf,
           unsigned int nb_match_token, void *resbuf, unsigned resbuf_size)
 {
-       cmdline_parse_token_hdr_t * token_p;
+       cmdline_parse_token_hdr_t *token_p = NULL;
        unsigned int i=0;
        int n = 0;
        struct cmdline_token_hdr token_hdr;