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rust: suppress error messages from CONFIG_{RUSTC,BINDGEN}_VERSION_TEXT

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While this is a somewhat unusual case, I encountered odd error messages
when I ran Kconfig in a foreign architecture chroot.

  $ make allmodconfig
  sh: 1: rustc: not found
  sh: 1: bindgen: not found
  #
  # configuration written to .config
  #

The successful execution of 'command -v rustc' does not necessarily mean
that 'rustc --version' will succeed.

  $ sh -c 'command -v rustc'
  /home/masahiro/.cargo/bin/rustc
  $ sh -c 'rustc --version'
  sh: 1: rustc: not found

Here, 'rustc' is built for x86, and I ran it in an arm64 system.

The current code:

  command -v $(RUSTC) >/dev/null 2>&1 && $(RUSTC) --version || echo n

can be turned into:

  command -v $(RUSTC) >/dev/null 2>&1 && $(RUSTC) --version 2>/dev/null || echo n

However, I did not understand the necessity of 'command -v $(RUSTC)'.

I simplified it to:

  $(RUSTC) --version 2>/dev/null || echo n

Fixes: 2f7ab1267d ("Kbuild: add Rust support")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20240727140302.1806011-1-masahiroy@kernel.org
[ Rebased on top of v6.11-rc1. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Masahiro Yamada 2024-07-27 23:02:59 +09:00 committed by Miguel Ojeda
parent 8400291e28
commit 5ce86c6c86
1 changed files with 2 additions and 2 deletions
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4
init/Kconfig
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@ -1919,7 +1919,7 @@ config RUST
config RUSTC_VERSION_TEXT
string
depends on RUST
default $(shell,command -v $(RUSTC) >/dev/null 2>&1 && $(RUSTC) --version || echo n)
default $(shell,$(RUSTC) --version 2>/dev/null || echo n)
config BINDGEN_VERSION_TEXT
string
@ -1927,7 +1927,7 @@ config BINDGEN_VERSION_TEXT
# The dummy parameter `workaround-for-0.69.0` is required to support 0.69.0
# (https://github.com/rust-lang/rust-bindgen/pull/2678). It can be removed when
# the minimum version is upgraded past that (0.69.1 already fixed the issue).
default $(shell,command -v $(BINDGEN) >/dev/null 2>&1 && $(BINDGEN) --version workaround-for-0.69.0 || echo n)
default $(shell,$(BINDGEN) --version workaround-for-0.69.0 2>/dev/null || echo n)
#
# Place an empty function call at each tracepoint site. Can be