From: Miguel Ojeda <ojeda@kernel.org>
To: Masahiro Yamada <masahiroy@kernel.org>,
Miguel Ojeda <ojeda@kernel.org>,
Wedson Almeida Filho <wedsonaf@gmail.com>,
Alex Gaynor <alex.gaynor@gmail.com>
Cc: "Nathan Chancellor" <nathan@kernel.org>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Nicolas Schier" <nicolas@fjasle.eu>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <benno.lossin@proton.me>,
"Alice Ryhl" <aliceryhl@google.com>,
"Andreas Hindborg" <a.hindborg@samsung.com>,
linux-kbuild@vger.kernel.org, rust-for-linux@vger.kernel.org,
linux-kernel@vger.kernel.org, patches@lists.linux.dev,
"Raphael Nestler" <raphael.nestler@gmail.com>,
"Andrea Righi" <andrea.righi@canonical.com>,
stable@vger.kernel.org
Subject: [PATCH] kbuild: rust: avoid creating temporary files
Date: Tue, 18 Jul 2023 07:52:35 +0200 [thread overview]
Message-ID: <20230718055235.1050223-1-ojeda@kernel.org> (raw)
`rustc` outputs by default the temporary files (i.e. the ones saved
by `-Csave-temps`, such as `*.rcgu*` files) in the current working
directory when `-o` and `--out-dir` are not given (even if
`--emit=x=path` is given, i.e. it does not use those for temporaries).
Since out-of-tree modules are compiled from the `linux` tree,
`rustc` then tries to create them there, which may not be accessible.
Thus pass `--out-dir` explicitly, even if it is just for the temporary
files.
Reported-by: Raphael Nestler <raphael.nestler@gmail.com>
Closes: https://github.com/Rust-for-Linux/linux/issues/1015
Reported-by: Andrea Righi <andrea.righi@canonical.com>
Tested-by: Raphael Nestler <raphael.nestler@gmail.com>
Tested-by: Andrea Righi <andrea.righi@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
scripts/Makefile.build | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 6413342a03f4..82e3fb19fdaf 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -264,6 +264,9 @@ $(obj)/%.lst: $(src)/%.c FORCE
rust_allowed_features := new_uninit
+# `--out-dir` is required to avoid temporaries being created by `rustc` in the
+# current working directory, which may be not accessible in the out-of-tree
+# modules case.
rust_common_cmd = \
RUST_MODFILE=$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \
-Zallow-features=$(rust_allowed_features) \
@@ -272,7 +275,7 @@ rust_common_cmd = \
--extern alloc --extern kernel \
--crate-type rlib -L $(objtree)/rust/ \
--crate-name $(basename $(notdir $@)) \
- --emit=dep-info=$(depfile)
+ --out-dir $(dir $@) --emit=dep-info=$(depfile)
# `--emit=obj`, `--emit=asm` and `--emit=llvm-ir` imply a single codegen unit
# will be used. We explicitly request `-Ccodegen-units=1` in any case, and
base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5
--
2.41.0
next reply other threads:[~2023-07-18 5:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-18 5:52 Miguel Ojeda [this message]
2023-07-18 16:43 ` [PATCH] kbuild: rust: avoid creating temporary files Nathan Chancellor
2023-07-19 17:44 ` Martin Rodriguez Reboredo
2023-07-20 17:17 ` Masahiro Yamada
2023-07-20 17:29 ` Miguel Ojeda
2023-07-20 18:34 ` Masahiro Yamada
2023-07-22 15:51 ` Miguel Ojeda
2023-07-23 5:05 ` Masahiro Yamada
2023-07-23 13:35 ` Masahiro Yamada
2023-07-23 14:27 ` Miguel Ojeda
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