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SubjectRe: [RFC 01/19] kbuild: Fixes to rules for host-cshlib and host-cxxshlib
On Tue, 2019-08-13 at 23:01 +0900, Masahiro Yamada wrote:
> On Tue, Aug 13, 2019 at 3:13 PM Knut Omang <> wrote:
> >
> > C++ libraries interfacing to C APIs might sometimes need some glue
> > logic more easily written in C.
> > Allow a C++ library to also contain 0 or more C objects.
> >
> > Also fix rules for both C and C++ shared libraries:
> > - C++ shared libraries depended on .c instead of .cc files
> > - Rules were referenced as -objs instead of the intended
> > -cobjs and -cxxobjs following the pattern from hostprogs*.
> >
> > Signed-off-by: Knut Omang <>
> How is this patch related to the rest of this series?

This is just my (likely naive) way I to get what I had working
using autotools in the Github version of KTF) translated into something
comparable using kbuild only. We need to build a shared library consisting
of a few C++ files and a very simple C file, and a couple of simple binaries,
and the rule in there does seem to take .c files and subject them to the
C++ compiler, which makes this difficult to achieve?

> This patch breaks GCC-plugins.
> Did you really compile-test this patch before the submission?

Sorry for my ignorance here:
I ran through the kernel build and installed the resulting kernel
on a VM that I used to test this, if that's what you are asking

Do I need some unusual .config options or run a special make target
to trigger the problem you see?

I used a recent Fedora config with default values for new options,
and ran the normal default make target (also with O=) and make selftests
to test the patch itself.


> --
> Best Regards
> Masahiro Yamada

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