linux-kernel - [PATCH v3 1/4] kbuild: add CONFIG_LD_IS

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Date:   Thu, 23 Apr 2020 10:18:04 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com, linux-kbuild@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Dmitry Golovin <dima@...ovin.in>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH v3 1/4] kbuild: add CONFIG_LD_IS_LLD

From: Sami Tolvanen <samitolvanen@...gle.com>

Similarly to the CC_IS_CLANG config, add LD_IS_LLD to avoid GNU ld
specific logic such as ld-version or ld-ifversion and gain the
ability to select potential features that depend on the linker at
configuration time such as LTO.

Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
Acked-by: Masahiro Yamada <masahiroy@...nel.org>
[nc: Reword commit message]
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
---

v2 -> v3:

* Add Masahiro's ack.

v1 -> v2:

* No changes.

Sami, please scream if you are unhappy with how I worded this commit.

 init/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/init/Kconfig b/init/Kconfig
index 9e22ee8fbd75e..c15ee42b82726 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -23,6 +23,9 @@ config LD_VERSION
 config CC_IS_CLANG
 	def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
 
+config LD_IS_LLD
+	def_bool $(success,$(LD) -v | head -n 1 | grep -q LLD)
+
 config CLANG_VERSION
 	int
 	default $(shell,$(srctree)/scripts/clang-version.sh $(CC))

base-commit: ae83d0b416db002fe95601e7f97f64b59514d936
-- 
2.26.2