On Tue, Apr 5, 2022 at 2:34 AM Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote: > > On Mon, Apr 04, 2022 at 12:41:54AM -0700, Christoph Hellwig wrote: > > On Mon, Apr 04, 2022 at 03:19:42PM +0900, Masahiro Yamada wrote: > > > If we can make kernel headers self-contained (that is, none of exported > > > kernel headers includes system headers), we will be able to add the > > > -nostdinc flag, but that is much far from where we stand now. > > This is something I'd like to see done. IMO, the kernel headers should > be the independent variable of which the libc is the dependendent > variable. > > Android's libc, Bionic, is making use of the UAPI headers. They are > doing some rewriting of UAPI headers, but I'd like to see what needs to > be upstreamed from there. I just noticed > include/uapi/linux/libc-compat.h, which seems like a good place for such > compat related issues. > > In particular, having UAPI_HEADER_TESTS depend on CC_CAN_LINK is > something I think we can works towards removing. The header tests > themselves don't link; they force a dependency on a prebuilt libc > sysroot, and they only need the headers from the sysroot because of this > existing circular dependency between kernel headers and libc headers. > > I'd be happy to be explicitly cc'ed on changes like this series, going > forward. Masahiro, if there's parts you'd like me to help with besides > just code review, please let me know how I can help. I wanted to make uapi headers as self-contained as possible, but I did not see much progress. I just fixed up some low-hanging fruits, but there are still many remaining issues. Thank you very much for your contribution: https://lore.kernel.org/all/20220404175448.46200-1-ndesaulniers@xxxxxxxxxx/ If you eliminate other issues, that would be appreciated. > > > > What is still missing for that? -- Best Regards Masahiro Yamada
