[build] Warning happen When building with Linux target

[cuiyanx]

Description

When I am building with Linux target, I have got some "warning". Although I can finish the Linux building, but please fix it.

Test Code

Steps to Reproduction

make BOARD=linux

Actual Result

Warning 1:
warning: "OC_CLOCK_CONF_TICKS_PER_SECOND" redefined

Warning 2:
warning: variable ‘key’ set but not used [-Wunused-but-set-variable]

Expected Result

No warning.

Test Builds

Branch	Commit Id	Target Device	Test Date	Result
master	d09e4b3	Linux	Jan 29, 2018	Fail

Additional Information

[grgustaf]

I don't seem to reproduce this. Can you give more context around the warnings? Are you sure there wasn't more to the build command line?

[jimmy-huang]

I do see the warning: variable ‘key’ set but not used [-Wunused-but-set-variable] warning, but i don't see the first one.

[grgustaf]

OK I do see that first warning in Travis output, so we should be able to address this.

[jimmy-huang]

patch submitted #1803

[cuiyanx]

I re-test this issue with #1802 and #1803, this issue has be fixed.
Waiting for #1802 and #1803 merged, I will close this.