From: Nick Desaulniers <ndesaulniers@google.com>
To: Masahiro Yamada <masahiroy@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>,
Fangrui Song <maskray@google.com>,
Michal Marek <michal.lkml@markovi.net>,
Arnd Bergmann <arnd@kernel.org>,
linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org,
clang-built-linux@googlegroups.com,
Geert Uytterhoeven <geert@linux-m68k.org>,
Christoph Hellwig <hch@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Nick Desaulniers <ndesaulniers@google.com>
Subject: [PATCH v2 0/2] infer CROSS_COMPILE from SRCARCH for LLVM=1 LLVM_IAS=1
Date: Thu, 8 Jul 2021 16:25:20 -0700 [thread overview]
Message-ID: <20210708232522.3118208-1-ndesaulniers@google.com> (raw)
We get constant feedback that the command line invocation of make is too
long. CROSS_COMPILE is helpful when a toolchain has a prefix of the
target triple, or is an absolute path outside of $PATH, but it's mostly
redundant for a given ARCH.
Instead, let's infer it from SRCARCH, and move some flag handling into a
new file included from the top level Makefile.
Changes v1 -> v2:
* patch 1/2 untouched.
* Fix typos in commit message as per Geert and Masahiro.
* Use SRCARCH instead of ARCH, simplifying x86 handling, as per
Masahiro. Add his sugguested by tag.
* change commit oneline from 'drop' to 'infer.'
* Add detail about explicit host --target and relationship of ARCH to
SRCARCH, as per Masahiro.
Nick Desaulniers (2):
Makefile: move initial clang flag handling into scripts/Makefile.clang
Makefile: infer CROSS_COMPILE from SRCARCH for LLVM=1 LLVM_IAS=1
Documentation/kbuild/llvm.rst | 5 ++++
MAINTAINERS | 1 +
Makefile | 15 +-----------
scripts/Makefile.clang | 44 +++++++++++++++++++++++++++++++++++
4 files changed, 51 insertions(+), 14 deletions(-)
create mode 100644 scripts/Makefile.clang
base-commit: a0e781a2a35a8dd4e6a38571998d59c6b0e32cd8
--
2.32.0.93.g670b81a890-goog
next reply other threads:[~2021-07-08 23:25 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-08 23:25 Nick Desaulniers [this message]
2021-07-08 23:25 ` [PATCH v2 1/2] Makefile: move initial clang flag handling into scripts/Makefile.clang Nick Desaulniers
2021-07-09 20:12 ` Nathan Chancellor
2021-07-08 23:25 ` [PATCH v2 2/2] Makefile: infer CROSS_COMPILE from SRCARCH for LLVM=1 LLVM_IAS=1 Nick Desaulniers
2021-07-09 20:44 ` Nathan Chancellor
2021-07-20 8:04 ` Masahiro Yamada
2021-07-20 17:30 ` Nathan Chancellor
2021-07-21 3:49 ` Masahiro Yamada
2021-07-28 18:59 ` Nick Desaulniers
2021-07-28 22:35 ` Masahiro Yamada
2021-07-20 17:42 ` Linus Torvalds
2021-07-20 19:58 ` Arnd Bergmann
2021-07-20 20:18 ` Nick Desaulniers
2021-07-21 4:04 ` Masahiro Yamada
2021-07-23 19:54 ` Geert Uytterhoeven
2021-07-24 13:46 ` Masahiro Yamada
2021-07-26 20:27 ` Eric W. Biederman
2021-07-27 7:07 ` Geert Uytterhoeven
2021-07-27 7:49 ` Arnd Bergmann
2021-07-27 7:55 ` Geert Uytterhoeven
2021-07-27 8:21 ` Arnd Bergmann
2021-07-27 10:10 ` Masahiro Yamada
2021-07-27 14:16 ` Eric W. Biederman
2021-07-27 15:45 ` Masahiro Yamada
2021-07-27 18:46 ` Eric W. Biederman
2021-07-28 22:31 ` Masahiro Yamada
2021-07-20 20:52 ` Nick Desaulniers
2021-07-20 21:11 ` Linus Torvalds
2021-07-20 21:27 ` Nick Desaulniers
2021-07-21 4:53 ` Masahiro Yamada
2021-07-20 21:29 ` Nick Desaulniers
2021-07-20 21:54 ` Linus Torvalds
2021-07-20 23:19 ` Linus Torvalds
2021-07-20 23:22 ` Linus Torvalds
2021-07-21 5:12 ` Masahiro Yamada
2021-07-21 4:52 ` Christoph Hellwig
2021-07-21 5:33 ` Masahiro Yamada
2021-07-21 4:31 ` Masahiro Yamada
2021-07-21 4:44 ` Christoph Hellwig
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