From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Masahiro Yamada <masahiroy@kernel.org>,
clang-built-linux@googlegroups.com
Subject: [PATCH v2 1/2] kbuild: fix CONFIG_CC_CAN_LINK(_STATIC) for cross-compilation with Clang
Date: Wed, 1 Jul 2020 00:06:24 +0900 [thread overview]
Message-ID: <20200630150625.12056-1-masahiroy@kernel.org> (raw)
scripts/cc-can-link.sh tests if the compiler can link userspace
programs.
When $(CC) is GCC, it is checked against the target architecture
because the toolchain prefix is specified as a part of $(CC).
When $(CC) is Clang, it is checked against the host architecture
because --target option is missing.
Pass $(CLANG_FLAGS) to scripts/cc-can-link.sh to evaluate the link
capability for the target architecture.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
Changes in v2:
- New patch
init/Kconfig | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/init/Kconfig b/init/Kconfig
index a46aa8f3174d..d0313e7725fa 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -49,13 +49,13 @@ config CLANG_VERSION
config CC_CAN_LINK
bool
- default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(m64-flag)) if 64BIT
- default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(m32-flag))
+ default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(m64-flag)) if 64BIT
+ default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(m32-flag))
config CC_CAN_LINK_STATIC
bool
- default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) -static $(m64-flag)) if 64BIT
- default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) -static $(m32-flag))
+ default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) -static $(m64-flag)) if 64BIT
+ default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) -static $(m32-flag))
config CC_HAS_ASM_GOTO
def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))
--
2.25.1
next reply other threads:[~2020-06-30 15:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-30 15:06 Masahiro Yamada [this message]
2020-06-30 15:06 ` [PATCH v2 2/2] kbuild: make Clang build userprogs for target architecture Masahiro Yamada
2020-06-30 21:14 ` Nathan Chancellor
2020-06-30 21:14 ` [PATCH v2 1/2] kbuild: fix CONFIG_CC_CAN_LINK(_STATIC) for cross-compilation with Clang Nathan Chancellor
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