[U-Boot] Intel Edison build warning

[Bin Meng]

Hi Andy,

On Fri, Nov 24, 2017 at 11:56 PM, Andy Shevchenko
<andriy.shevchenko at linux.intel.com> wrote:
> On Fri, 2017-11-24 at 17:42 +0200, Andy Shevchenko wrote:
>> On Fri, 2017-11-24 at 16:06 +0800, Bin Meng wrote:
>> > Hi,
>> >
>> > Intel Edison has a build warning below.
>> >
>> > +  *env_addr = offset;
>> > +            ^
>> > w+../env/mmc.c: In function 'mmc_get_env_addr':
>> > w+../env/mmc.c:121:12: warning: 'val' may be used uninitialized in
>> > this function [-Wmaybe-uninitialized]
>> >
>> > I did not figure out what is wrong here. v2017.11 does not have such
>> > build warning.
>> >
>> > Do you have any idea?
>
> Somewhat compiler goes crazy?
>
> I have a theory that instead of showing actual potential issues (which
> are bogus anyway) it complains on __weak function instead.
>
> The real complains might be env_mmc_load() / env_mmc_save() where
> offset* is uninitialized indeed.
>

Thanks for the testing. I was using GCC 5.4.0 for the build testing
which is the default one shipped in Ubuntu 16.04 LTS. I will try to
find another version to test.

Regards,
Bin