# \[PATCH\] powerpc: Kconfig: disable CONFIG\_COMPAT for clang \< 12 - Subsystems: LINUX FOR POWERPC (32-BIT AND 64-BIT), THE REST - Maintainers: Madhavan Srinivasan, Linus Torvalds - Status: LANDED (6fcb574125e6 ยท 2021-05-23 10:51) - Landed in mainline as 6fcb574125e6 on 2021-05-23. - List: linuxppc-dev - 3 messages, 3 authors - Page: https://ratatoskr.run/linuxppc-dev/2021/05/1382601/t ## \[PATCH\] powerpc: Kconfig: disable CONFIG\_COMPAT for clang \< 12 - From: Nick Desaulniers \ - Date: 2021-05-18 20:59:06 - Message: https://ratatoskr.run/linuxppc-dev/2021/05/1382601.md ```text Until clang-12, clang would attempt to assemble 32b powerpc assembler in 64b emulation mode when using a 64b target triple with -m32, leading to errors during the build of the compat VDSO. Simply disable all of CONFIG_COMPAT; users should upgrade to the latest release of clang for proper support. Link: https://github.com/ClangBuiltLinux/linux/issues/1160 Link: https://github.com/llvm/llvm-project/commits/2288319733cd5f525bf7e24dece08bfcf9d0ff9e Link: https://groups.google.com/g/clang-built-linux/c/ayNmi3HoNdY/m/XJAGj_G2AgAJ Suggested-by: Nathan Chancellor Signed-off-by: Nick Desaulniers --- arch/powerpc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index ce3f59531b51..2a02784b7ef0 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -289,6 +289,7 @@ config PANIC_TIMEOUT config COMPAT bool "Enable support for 32bit binaries" depends on PPC64 + depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 default y if !CPU_LITTLE_ENDIAN select ARCH_WANT_OLD_COMPAT_IPC select COMPAT_OLD_SIGACTION -- 2.31.1.751.gd2f1c929bd-goog ``` ## Re: \[PATCH\] powerpc: Kconfig: disable CONFIG\_COMPAT for clang \< 12 - From: Nathan Chancellor \ - Date: 2021-05-18 21:13:01 - Message: https://ratatoskr.run/linuxppc-dev/2021/05/1382612.md ```text On 5/18/2021 1:58 PM, Nick Desaulniers wrote: > Until clang-12, clang would attempt to assemble 32b powerpc assembler in > 64b emulation mode when using a 64b target triple with -m32, leading to > errors during the build of the compat VDSO. Simply disable all of > CONFIG_COMPAT; users should upgrade to the latest release of clang for > proper support. > > Link: https://github.com/ClangBuiltLinux/linux/issues/1160 > Link: https://github.com/llvm/llvm-project/commits/2288319733cd5f525bf7e24dece08bfcf9d0ff9e > Link: https://groups.google.com/g/clang-built-linux/c/ayNmi3HoNdY/m/XJAGj_G2AgAJ > Suggested-by: Nathan Chancellor > Signed-off-by: Nick Desaulniers Reviewed-by: Nathan Chancellor > --- > arch/powerpc/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index ce3f59531b51..2a02784b7ef0 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -289,6 +289,7 @@ config PANIC_TIMEOUT > config COMPAT > bool "Enable support for 32bit binaries" > depends on PPC64 > + depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 > default y if !CPU_LITTLE_ENDIAN > select ARCH_WANT_OLD_COMPAT_IPC > select COMPAT_OLD_SIGACTION > ``` ## Re: \[PATCH\] powerpc: Kconfig: disable CONFIG\_COMPAT for clang \< 12 - From: Michael Ellerman \ - Date: 2021-06-06 12:13:13 - Message: https://ratatoskr.run/linuxppc-dev/2021/06/1403912.md ```text On Tue, 18 May 2021 13:58:57 -0700, Nick Desaulniers wrote: > Until clang-12, clang would attempt to assemble 32b powerpc assembler in > 64b emulation mode when using a 64b target triple with -m32, leading to > errors during the build of the compat VDSO. Simply disable all of > CONFIG_COMPAT; users should upgrade to the latest release of clang for > proper support. Applied to powerpc/next. [1/1] powerpc: Kconfig: disable CONFIG_COMPAT for clang < 12 https://git.kernel.org/powerpc/c/6fcb574125e673f33ff058caa54b4e65629f3a08 cheers ```