[Scons-users] Scons Implicity Dependency not found issue

[Hua Yanghao]

By the way, is scons scanner scans C file headers recursively? Thanks.
On Tue, Oct 16, 2018 at 12:40 PM Hua Yanghao <huayanghao at gmail.com> wrote:
>
> scons: *** [build/configs/pangu/usw/firmware/arch/pangu/test.os]
> Implicit dependency
> `build/configs/pangu/usw/firmware/arch/pangu/include/io.h' not found,
> needed by target `build/configs/pangu/usw/firmware/arch/pangu/test.os'
>
> I recently run into this odd problem, and it is very difficult to
> reproduce. I did not explicitly enable the "implicit_cache" option
> anywhere in my code. If I simply remove the build folder and then
> re-build everything works as normal. the problem happens when there is
> a old build, and then I pulled in some new code where this "test.c"
> has included an additional header io.h and scons seems not re-scanning
> the file by default.
>
> I am using scons 3.0.1, is the implict_cache by default enabled there
> and I have to disable it manually?
>
> Thanks,
> Yanghao Hua