Hi Mauro,

On Wed, Mar 7, 2018 at 6:14 AM, Mauro Carvalho Chehab
<mche...@s-opensource.com> wrote:
> Not sure why, but, on ia64, with Linaro's gcc 7.3 compiler,
> using #ifdef (CONFIG_I2C) is not OK.

Looking at the kbuild report the failure happens when CONFIG_I2C=m.

IS_ENABLED() macro takes care of both built-in and module as it will expand to:

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)

and that's the reason why IS_ENABLE() fixes the build problem.


Fabio Estevam

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