On Thu, Mar 4, 2021 at 12:04 AM Tiezhu Yang <yangtiezhu@xxxxxxxxxxx> wrote: > > When building with Clang [1]: > > $ make CC=clang loongson3_defconfig > $ make CC=clang > > there exists the following error: > > Checking missing-syscalls for O32 > CALL scripts/checksyscalls.sh > error: ABI 'o32' is not supported on CPU 'mips64r2' > make[1]: *** [Kbuild:48: missing-syscalls] Error 1 > make: *** [arch/mips/Makefile:419: archprepare] Error 2 > > This is a known bug [2] with Clang, as Simon Atanasyan said, > "There is no plan on support O32 for MIPS64 due to lack of > resources". It's my hope we will fix the resourcing issue. I'm working on that; it's a non-technical challenge though. Acked-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > > It is not a good idea to remove CONFIG_MIPS32_O32=y directly > in defconfig because GCC works, as Nathan said, the config > should not even be selectable when building with Clang, so > just make MIPS32_O32 depends on !CC_IS_CLANG. > > [1] https://www.kernel.org/doc/html/latest/kbuild/llvm.html > [2] https://bugs.llvm.org/show_bug.cgi?id=38063 > > Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx> > Acked-by: Nathan Chancellor <nathan@xxxxxxxxxx> > --- > > v3: Update the commit message suggested by Nathan, thank you! > > arch/mips/Kconfig | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig > index 3a38d27..f6ba59f 100644 > --- a/arch/mips/Kconfig > +++ b/arch/mips/Kconfig > @@ -3318,6 +3318,8 @@ config SYSVIPC_COMPAT > config MIPS32_O32 > bool "Kernel support for o32 binaries" > depends on 64BIT > + # https://bugs.llvm.org/show_bug.cgi?id=38063 > + depends on !CC_IS_CLANG > select ARCH_WANT_OLD_COMPAT_IPC > select COMPAT > select MIPS32_COMPAT > -- > 2.1.0 > > -- > You received this message because you are subscribed to the Google Groups "Clang Built Linux" group. > To unsubscribe from this group and stop receiving emails from it, send an email to clang-built-linux+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/clang-built-linux/1614845040-12995-1-git-send-email-yangtiezhu%40loongson.cn. -- Thanks, ~Nick Desaulniers
