On Wed, 2014-12-03 at 08:29 -0800, Tim Bird wrote: > > On 12/02/2014 07:43 PM, Michael Ellerman wrote: > > On Tue, 2014-12-02 at 19:36 -0800, Tim Bird wrote: > >> This test shows the amount of memory used by the system. > >> Note that this is dependent on the user-space that is loaded > >> when this program runs. Optimally, this program would be > >> run as the init program itself. > > > > Sorry to only chime in at v5. > > > >> diff --git a/tools/testing/selftests/size/Makefile > >> b/tools/testing/selftests/size/Makefile > >> new file mode 100644 > >> index 0000000..47f8e9c > >> --- /dev/null > >> +++ b/tools/testing/selftests/size/Makefile > >> @@ -0,0 +1,15 @@ > >> +#ifndef CC > >> + CC = $(CROSS_COMPILE)gcc > >> +#endif > > > > I think the following is preferable: > > > > CC := $(CROSS_COMPILE)$(CC) > > > > > > It allows optionally setting a custom CC, as well as optionally > > CROSS_COMPILE. > > I'm not sure I follow this. > > If CC is unset, you get only the CROSS_COMPILE prefix.
CC is never unset. The default value is 'cc'. > If CC is set to e.g. 'gcc', then you get a nicely formatted toolchain string. Right. > But if CC already has the prefix applied, then this will result in > having it duplicated, which surely won't work correctly. That's just PEBKAC. Don't specify CROSS_COMPILE and also a fully specified CC. Try it with the kernel Makefile and see how well it works. > CROSS_COMPILE prefix usage looks a bit uncoordinated in the tools directory, > but most > tests seem to be favoring $(CROSS_COMPILE)gcc. That doesn't make it right :) > > $ cd tools ; mgrep CROSS ... > ./testing/selftests/powerpc/Makefile:CC := $(CROSS_COMPILE)$(CC) You can run git blame on that one if you like ;) > I agree it's desirable not to hardcode gcc, but we seem to be doing it all > over > the place already. If everyone jumped off a bridge ... :) cheers -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
