[LTP] [PATCH V2 1/2] tst_timer: Add time64 related helpers

[Arnd Bergmann]

On Wed, Apr 15, 2020 at 1:52 PM Cyril Hrubis <chrubis@suse.cz> wrote:
>
> Hi!
> > This introduces a new set of helpers to handle the time64 related
> > timespec. Instead of duplicating the code, this moves the existing code
> > into a macro and then defines timespec and time64 related helpers using
> > it.
>
> I'm not sure that adding a macro that spans over ~150 lines is a good
> idea. Unfortunately there is not so much options for a C language that
> lacks generics.
>
> Maybe it would be slightly better to write a shell script that would
> generate these defintions into a separate header that would be included
> in the tst_timer.h. That way we can run it manually to regenerate the
> header if needed. At least we would get saner error message from
> compiler that way.

How about having a shared .c file that is built multiple times with different
sets of -DBUILD_FOO options set from the Makefile, and a small
number of #ifdefs inside that file?

      Arnd