[PATCH 6.1 146/321] rust: suppress error messages from CONFIG_{RUSTC,BINDGEN}_VERSION_TEXT

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6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Masahiro Yamada <masahiroy@xxxxxxxxxx>

[ Upstream commit 5ce86c6c861352c9346ebb5c96ed70cb67414aa3 ]

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: 2f7ab1267dc9 ("Kbuild: add Rust support")
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240727140302.1806011-1-masahiroy@xxxxxxxxxx
[ Rebased on top of v6.11-rc1. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 init/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 19de862768239..85e8bf76aeccb 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1942,7 +1942,7 @@ 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
@@ -1950,7 +1950,7 @@ 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
-- 
2.43.0







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