[v3] sparc/build: Rework CFLAGS for clang compatibility

[PATCH v3 2/2] sparc/build: Add SPARC target flags for compiling with clang

Posted by Koakuma via B4 Relay 3 weeks, 5 days ago

From: Koakuma <koachan@protonmail.com>

clang only supports building 64-bit kernel, so we use the
sparc64-linux-gnu target.

See also: https://lore.kernel.org/lkml/e26PTXUXEz8OYXmaeKn4Mpuejr4IOlFfFwdB5vpsluXlYiqDdlyQTYcDtdAny_o4gO4SfPeQCCN2qpyT6e0nog5EaP3xk2SeUPTrF54p1gM=@protonmail.com/T/#m068e010dcf8b99d3510a90d7532bcdb70e2e2c6b

Signed-off-by: Koakuma <koachan@protonmail.com>
---
 Documentation/kbuild/llvm.rst | 3 +++
 scripts/Makefile.clang        | 1 +
 2 files changed, 4 insertions(+)

diff --git a/Documentation/kbuild/llvm.rst b/Documentation/kbuild/llvm.rst
index 6dc66b4f31a7bb62ba5bb6174730dc0a69ee0bba..bc8a283bc44bbfa9948ad3c9fe8031269ce10be4 100644
--- a/Documentation/kbuild/llvm.rst
+++ b/Documentation/kbuild/llvm.rst
@@ -179,6 +179,9 @@ yet. Bug reports are always welcome at the issue tracker below!
    * - s390
      - Maintained
      - ``LLVM=1`` (LLVM >= 18.1.0), ``CC=clang`` (LLVM < 18.1.0)
+   * - sparc (sparc64 only)
+     - Maintained
+     - ``CC=clang LLVM_IAS=0`` (LLVM >= 20)
    * - um (User Mode)
      - Maintained
      - ``LLVM=1``
diff --git a/scripts/Makefile.clang b/scripts/Makefile.clang
index 6c23c6af797fb016232914589c948208345417ad..2435efae67f53a26d55a1c0f1bf254a49d9fc731 100644
--- a/scripts/Makefile.clang
+++ b/scripts/Makefile.clang
@@ -10,6 +10,7 @@ CLANG_TARGET_FLAGS_mips		:= mipsel-linux-gnu
 CLANG_TARGET_FLAGS_powerpc	:= powerpc64le-linux-gnu
 CLANG_TARGET_FLAGS_riscv	:= riscv64-linux-gnu
 CLANG_TARGET_FLAGS_s390		:= s390x-linux-gnu
+CLANG_TARGET_FLAGS_sparc	:= sparc64-linux-gnu
 CLANG_TARGET_FLAGS_x86		:= x86_64-linux-gnu
 CLANG_TARGET_FLAGS_um		:= $(CLANG_TARGET_FLAGS_$(SUBARCH))
 CLANG_TARGET_FLAGS		:= $(CLANG_TARGET_FLAGS_$(SRCARCH))

-- 
2.47.0

Re: [PATCH v3 2/2] sparc/build: Add SPARC target flags for compiling with clang

Posted by Masahiro Yamada 3 weeks, 1 day ago

On Tue, Oct 29, 2024 at 11:49 PM Koakuma via B4 Relay
<devnull+koachan.protonmail.com@kernel.org> wrote:
>
> From: Koakuma <koachan@protonmail.com>
>
> clang only supports building 64-bit kernel, so we use the
> sparc64-linux-gnu target.
>
> See also: https://lore.kernel.org/lkml/e26PTXUXEz8OYXmaeKn4Mpuejr4IOlFfFwdB5vpsluXlYiqDdlyQTYcDtdAny_o4gO4SfPeQCCN2qpyT6e0nog5EaP3xk2SeUPTrF54p1gM=@protonmail.com/T/#m068e010dcf8b99d3510a90d7532bcdb70e2e2c6b
>
> Signed-off-by: Koakuma <koachan@protonmail.com>


Acked-by: Masahiro Yamada <masahiroy@kernel.org>


-- 
Best Regards
Masahiro Yamada

Re: [PATCH v3 2/2] sparc/build: Add SPARC target flags for compiling with clang

Posted by Nathan Chancellor 3 weeks, 5 days ago

On Tue, Oct 29, 2024 at 09:49:08PM +0700, Koakuma via B4 Relay wrote:
> From: Koakuma <koachan@protonmail.com>
> 
> clang only supports building 64-bit kernel, so we use the
> sparc64-linux-gnu target.
> 
> See also: https://lore.kernel.org/lkml/e26PTXUXEz8OYXmaeKn4Mpuejr4IOlFfFwdB5vpsluXlYiqDdlyQTYcDtdAny_o4gO4SfPeQCCN2qpyT6e0nog5EaP3xk2SeUPTrF54p1gM=@protonmail.com/T/#m068e010dcf8b99d3510a90d7532bcdb70e2e2c6b
> 
> Signed-off-by: Koakuma <koachan@protonmail.com>

Acked-by: Nathan Chancellor <nathan@kernel.org>

> ---
>  Documentation/kbuild/llvm.rst | 3 +++
>  scripts/Makefile.clang        | 1 +
>  2 files changed, 4 insertions(+)
> 
> diff --git a/Documentation/kbuild/llvm.rst b/Documentation/kbuild/llvm.rst
> index 6dc66b4f31a7bb62ba5bb6174730dc0a69ee0bba..bc8a283bc44bbfa9948ad3c9fe8031269ce10be4 100644
> --- a/Documentation/kbuild/llvm.rst
> +++ b/Documentation/kbuild/llvm.rst
> @@ -179,6 +179,9 @@ yet. Bug reports are always welcome at the issue tracker below!
>     * - s390
>       - Maintained
>       - ``LLVM=1`` (LLVM >= 18.1.0), ``CC=clang`` (LLVM < 18.1.0)
> +   * - sparc (sparc64 only)
> +     - Maintained
> +     - ``CC=clang LLVM_IAS=0`` (LLVM >= 20)
>     * - um (User Mode)
>       - Maintained
>       - ``LLVM=1``
> diff --git a/scripts/Makefile.clang b/scripts/Makefile.clang
> index 6c23c6af797fb016232914589c948208345417ad..2435efae67f53a26d55a1c0f1bf254a49d9fc731 100644
> --- a/scripts/Makefile.clang
> +++ b/scripts/Makefile.clang
> @@ -10,6 +10,7 @@ CLANG_TARGET_FLAGS_mips		:= mipsel-linux-gnu
>  CLANG_TARGET_FLAGS_powerpc	:= powerpc64le-linux-gnu
>  CLANG_TARGET_FLAGS_riscv	:= riscv64-linux-gnu
>  CLANG_TARGET_FLAGS_s390		:= s390x-linux-gnu
> +CLANG_TARGET_FLAGS_sparc	:= sparc64-linux-gnu
>  CLANG_TARGET_FLAGS_x86		:= x86_64-linux-gnu
>  CLANG_TARGET_FLAGS_um		:= $(CLANG_TARGET_FLAGS_$(SUBARCH))
>  CLANG_TARGET_FLAGS		:= $(CLANG_TARGET_FLAGS_$(SRCARCH))
> 
> -- 
> 2.47.0
> 
>