From: Nathan Chancellor <nathan@kernel.org> To: Nick Desaulniers <ndesaulniers@google.com>, Michael Ellerman <mpe@ellerman.id.au> Cc: Segher Boessenkool <segher@kernel.crashing.org>, Fangrui Song <maskray@google.com>, Christophe Leroy <christophe.leroy@csgroup.eu>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com Subject: Re: [PATCH] powerpc: Kconfig: disable CONFIG_COMPAT for clang < 12 Date: Tue, 18 May 2021 14:12:56 -0700 [thread overview] Message-ID: <fe638f4e-4dea-2f5e-2193-2f8b63aaf7a8@kernel.org> (raw) In-Reply-To: <20210518205858.2440344-1-ndesaulniers@google.com> 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 <nathan@kernel.org> > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> > --- > 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 >
WARNING: multiple messages have this Message-ID (diff)
From: Nathan Chancellor <nathan@kernel.org> To: Nick Desaulniers <ndesaulniers@google.com>, Michael Ellerman <mpe@ellerman.id.au> Cc: Fangrui Song <maskray@google.com>, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Paul Mackerras <paulus@samba.org>, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH] powerpc: Kconfig: disable CONFIG_COMPAT for clang < 12 Date: Tue, 18 May 2021 14:12:56 -0700 [thread overview] Message-ID: <fe638f4e-4dea-2f5e-2193-2f8b63aaf7a8@kernel.org> (raw) In-Reply-To: <20210518205858.2440344-1-ndesaulniers@google.com> 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 <nathan@kernel.org> > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> > --- > 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 >
next prev parent reply other threads:[~2021-05-18 21:13 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-18 20:58 [PATCH] powerpc: Kconfig: disable CONFIG_COMPAT for clang < 12 Nick Desaulniers 2021-05-18 20:58 ` Nick Desaulniers 2021-05-18 21:12 ` Nathan Chancellor [this message] 2021-05-18 21:12 ` Nathan Chancellor 2021-06-06 12:08 ` Michael Ellerman 2021-06-06 12:08 ` Michael Ellerman
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