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    SubjectRe: [Patch] kbuild: fix a compile warning
    From
    On Fri, May 15, 2009 at 3:51 PM, Amerigo Wang <amwang@redhat.com> wrote:
    >
    > I got this warning:
    >
    >  HOSTCC  scripts/basic/fixdep
    > scripts/basic/fixdep.c: In function 'traps':
    > scripts/basic/fixdep.c:377: warning: dereferencing type-punned pointer will break strict-aliasing rules
    > scripts/basic/fixdep.c:379: warning: dereferencing type-punned pointer will break strict-aliasing rules


    these warnings can be supressed by adding a compile option -fno-strict-aliasing


    >
    > Patch below fixes it.
    >
    > Signed-off-by: WANG Cong <amwang@redhat.com>
    > Cc: Sam Ravnborg <sam@ravnborg.org>
    >
    > ---
    > diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
    > index 8912c0f..72c1520 100644
    > --- a/scripts/basic/fixdep.c
    > +++ b/scripts/basic/fixdep.c
    > @@ -373,10 +373,11 @@ void print_deps(void)
    >  void traps(void)
    >  {
    >        static char test[] __attribute__((aligned(sizeof(int)))) = "CONF";
    > +       int *p = (int *)test;
    >
    > -       if (*(int *)test != INT_CONF) {
    > +       if (*p != INT_CONF) {
    >                fprintf(stderr, "fixdep: sizeof(int) != 4 or wrong endianess? %#x\n",
    > -                       *(int *)test);
    > +                       *p);
    >                exit(2);
    >        }
    >  }
    > --
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