On Thu, Jul 04, 2019 at 10:29:35AM +0200, Arnd Bergmann wrote: > On Thu, Jul 4, 2019 at 10:13 AM Linus Walleij <linus.wall...@linaro.org> > wrote: > > On Tue, Jun 25, 2019 at 11:04 PM Nick Desaulniers <ndesaulni...@google.com> > > wrote: > > > > > Clang produces references to __aeabi_uidivmod and __aeabi_idivmod for > > > arm-linux-gnueabi and arm-linux-gnueabihf targets incorrectly when AEABI > > > is not selected (such as when OABI_COMPAT is selected). > > > > > > While this means that OABI userspaces wont be able to upgraded to > > > kernels built with Clang, it means that boards that don't enable AEABI > > > like s3c2410_defconfig will stop failing to link in KernelCI when built > > > with Clang. > > > > > > Link: https://github.com/ClangBuiltLinux/linux/issues/482 > > > Link: > > > https://groups.google.com/forum/#!msg/clang-built-linux/yydsAAux5hk/GxjqJSW-AQAJ > > > Suggested-by: Arnd Bergmann <a...@arndb.de> > > > Signed-off-by: Nick Desaulniers <ndesaulni...@google.com> > > > > As reflecting the state of things with CLANG it's: > > Reviewed-by: Linus Walleij <linus.wall...@linaro.org> > > > > But I think we in general need to have some discussion on how to > > proceed with OABI userspaces. > > > > I am well aware of distributions like OpenWrt using EABI even > > on ARMv4 with "tricks" like this: > > https://github.com/openwrt/openwrt/blob/master/toolchain/gcc/patches/9.1.0/840-armv4_pass_fix-v4bx_to_ld.patch > > I did not expect that to be necessary in gcc as long as it supports > building for armv4 (non-t), but I might be missing something here. > > > I have one OABI that I can think of would be nice to live on > > and it's the RedHat derivative on my Foorbridge NetWinder. > > OK I wouldn't cry if we have to kill it because it is too hard to > > keep supporting it, but it has been running the latest kernels > > all along so if it's not a huge effort I'd be interested in knowing > > the options. > > But do you see any problems with cross-compiling kernels to > EABI with CONFIG_OABI_COMPAT for machines like that?
Yes, there are a few ioctls that break. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up
