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From: ndesaulniers@google.com
To: yamada.masahiro@socionext.com
Cc: Nick Desaulniers <ndesaulniers@google.com>,
	Nathan Chancellor <natechancellor@gmail.com>,
	Sami Tolvanen <samitolvanen@google.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Kees Cook <keescook@chromium.org>,
	Dominik Brodowski <linux@dominikbrodowski.net>,
	Nicholas Piggin <npiggin@gmail.com>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Vasily Gorbik <gor@linux.ibm.com>, Adrian Reber <adrian@lisas.de>,
	Richard Guy Briggs <rgb@redhat.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/4] init/Kconfig: add config support for detecting linker
Date: Thu,  7 Feb 2019 14:01:49 -0800	[thread overview]
Message-ID: <20190207220155.81351-1-ndesaulniers@google.com> (raw)

Similar to how we differentiate between CONFIG_CC_IS_GCC and
CONFIG_CC_IS_CLANG, add CONFIG_LD_IS_BFD, CONFIG_LD_IS_GOLD, and
CONFIG_LD_IS_LLD.

This simiplifies patches to Makefiles that need to do different things
for different linkers.

Cc: Nathan Chancellor <natechancellor@gmail.com>
Cc: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
---
 init/Kconfig | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/init/Kconfig b/init/Kconfig
index c9386a365eea..b6046dcf7794 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -26,6 +26,15 @@ config CLANG_VERSION
 config CC_HAS_ASM_GOTO
 	def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))
 
+config LD_IS_BFD
+	def_bool $(success,$(LD) --version | head -n 1 | grep -q 'GNU ld')
+
+config LD_IS_GOLD
+	def_bool $(success,$(LD) --version | head -n 1 | grep -q 'GNU gold')
+
+config LD_IS_LLD
+	def_bool $(success,$(LD) --version | head -n 1 | grep -q 'LLD')
+
 config CONSTRUCTORS
 	bool
 	depends on !UML
-- 
2.20.1.791.gb4d0f1c61a-goog


             reply	other threads:[~2019-02-07 22:02 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-07 22:01 ndesaulniers [this message]
2019-02-07 22:01 ` [PATCH 2/4] Makefile: clang: choose GCC_TOOLCHAIN_DIR not on LD ndesaulniers
2019-02-08  5:45   ` Nathan Chancellor
2019-02-07 22:01 ` [PATCH 3/4] Makefile: lld: tell clang to use lld ndesaulniers
2019-02-08  5:50   ` Nathan Chancellor
2019-02-08 17:27     ` Nick Desaulniers
2019-02-08 17:45       ` Nathan Chancellor
2019-02-11 15:32       ` Masahiro Yamada
2019-02-11 16:05         ` Sedat Dilek
2019-02-11 19:30           ` Nick Desaulniers
2019-02-11 19:27         ` Nick Desaulniers
2019-02-11 19:26     ` Nick Desaulniers
2019-02-07 22:01 ` [PATCH 4/4] Makefile: lld: set -O2 linker flag when linking with LLD ndesaulniers
2019-02-08  6:07   ` Nathan Chancellor
2019-02-08  0:48 ` [PATCH 1/4] init/Kconfig: add config support for detecting linker Kees Cook
2019-02-08  0:57 ` Mathieu Desnoyers
2019-02-08  5:41   ` Nathan Chancellor
2019-02-11 15:08     ` Masahiro Yamada
2019-02-08  5:14 ` Nathan Chancellor
2019-02-08 14:06 Sedat Dilek

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