Re: [PATCH] docs/style: allow C99 mixed declarations

[Samuel Tardieu <sam@rfc1149.net>]

Daniel P. Berrangé <berrange@redhat.com> writes:

> $ gcc -Wall -Wuninitialized -o jump jump.c

Note that many GCC warnings don't trigger if you don't enable 
optimizations. In the case you exhibit, adding -O is enough to get 
a sensible warning:

$ gcc -Wall -O -o jump jump.c
jump.c: In function ‘main’:
jump.c:11:3: warning: ‘foo’ may be used uninitialized 
[-Wmaybe-uninitialized]
   11 |   free(foo);
      |   ^~~~~~~~~
jump.c:8:9: note: ‘foo’ was declared here
    8 |   char *foo = malloc(30);
      |         ^~~

Best.

  Sam
-- 
Samuel Tardieu