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Name	Size	Permission	Date
atomic	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
basic	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
clang-tools	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
coccinelle	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
dtc	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
dummy-tools	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
gcc-plugins	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
gdb	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
genksyms	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
kconfig	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
ksymoops	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
mod	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
package	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
selinux	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
tracing	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
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Kconfig.include	2.65 KB	-rw-r--r--	2026-07-01 19:48
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Makefile	1.87 KB	-rw-r--r--	2024-03-10 20:38
Makefile.asm-generic	1.82 KB	-rw-r--r--	2024-03-10 20:38
Makefile.btf	638 B	-rw-r--r--	2024-03-10 20:38
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Makefile.clang	1.61 KB	-rw-r--r--	2024-03-10 20:38
Makefile.clean	1.87 KB	-rw-r--r--	2024-03-10 20:38
Makefile.compiler	2.74 KB	-rw-r--r--	2024-03-10 20:38
Makefile.debug	1.12 KB	-rw-r--r--	2024-03-10 20:38
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asn1_compiler	34.3 KB	-rwxr-xr-x	2026-07-01 19:48
asn1_compiler.c	35.32 KB	-rw-r--r--	2024-03-10 20:38
bloat-o-meter	3.77 KB	-rwxr-xr-x	2024-03-10 20:38
bootgraph.pl	5.64 KB	-rwxr-xr-x	2024-03-10 20:38
bpf_doc.py	31.73 KB	-rwxr-xr-x	2026-07-01 19:48
cc-can-link.sh	166 B	-rwxr-xr-x	2024-03-10 20:38
cc-version.sh	1.36 KB	-rwxr-xr-x	2024-03-10 20:38
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checksyscalls.sh	7.51 KB	-rwxr-xr-x	2024-03-10 20:38
checkversion.pl	2.16 KB	-rwxr-xr-x	2024-03-10 20:38
cleanfile	3.46 KB	-rwxr-xr-x	2024-03-10 20:38
cleanpatch	5.06 KB	-rwxr-xr-x	2024-03-10 20:38
coccicheck	7.9 KB	-rwxr-xr-x	2024-03-10 20:38
config	4.78 KB	-rwxr-xr-x	2026-07-01 19:48
const_structs.checkpatch	1.4 KB	-rw-r--r--	2024-03-10 20:38
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extract-sys-certs.pl	3.75 KB	-rwxr-xr-x	2024-03-10 20:38
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extract_xc3028.pl	44.62 KB	-rwxr-xr-x	2024-03-10 20:38
faddr2line	8.63 KB	-rwxr-xr-x	2024-03-10 20:38
file-size.sh	86 B	-rwxr-xr-x	2024-03-10 20:38
find-unused-docs.sh	1.27 KB	-rwxr-xr-x	2024-03-10 20:38
gcc-x86_32-has-stack-protector.sh	405 B	-rwxr-xr-x	2026-07-01 19:48
gcc-x86_64-has-stack-protector.sh	195 B	-rwxr-xr-x	2026-07-01 19:48
gen-randstruct-seed.sh	228 B	-rwxr-xr-x	2024-03-10 20:38
generate_initcall_order.pl	5.95 KB	-rwxr-xr-x	2024-03-10 20:38
generate_rust_analyzer.py	5.85 KB	-rwxr-xr-x	2026-07-01 19:48
generate_rust_target	505.09 KB	-rwxr-xr-x	2026-07-01 19:48
generate_rust_target.rs	5.59 KB	-rw-r--r--	2026-07-01 19:48
get_abi.pl	25.36 KB	-rwxr-xr-x	2024-03-10 20:38
get_dvb_firmware	24.54 KB	-rwxr-xr-x	2024-03-10 20:38
get_feat.pl	14.61 KB	-rwxr-xr-x	2024-03-10 20:38
get_maintainer.pl	67.63 KB	-rwxr-xr-x	2024-03-10 20:38
gfp-translate	2.08 KB	-rwxr-xr-x	2026-07-01 19:48
git.orderFile	564 B	-rw-r--r--	2024-03-10 20:38
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headerdep.pl	3.5 KB	-rwxr-xr-x	2024-03-10 20:38
headers_install.sh	2.76 KB	-rwxr-xr-x	2024-03-10 20:38
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insert-sys-cert.c	13.08 KB	-rw-r--r--	2026-07-01 19:48
install.sh	986 B	-rwxr-xr-x	2024-03-10 20:38
jobserver-exec	2.56 KB	-rwxr-xr-x	2024-03-10 20:38
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leaking_addresses.pl	12.84 KB	-rwxr-xr-x	2024-03-10 20:38
link-vmlinux.sh	7.66 KB	-rwxr-xr-x	2026-07-01 19:48
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min-tool-version.sh	630 B	-rwxr-xr-x	2026-07-01 19:48
misc-check	509 B	-rwxr-xr-x	2024-03-10 20:38
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profile2linkerlist.pl	414 B	-rwxr-xr-x	2024-03-10 20:38
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Rename

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Tests whether a suitable Rust toolchain is available.

set -e

min_tool_version=$(dirname $0)/min-tool-version.sh

# Convert the version string x.y.z to a canonical up-to-7-digits form.
#
# Note that this function uses one more digit (compared to other
# instances in other version scripts) to give a bit more space to
# `rustc` since it will reach 1.100.0 in late 2026.
get_canonical_version()
{
	IFS=.
	set -- $1
	echo $((100000 * $1 + 100 * $2 + $3))
}

# Print a reference to the Quick Start guide in the documentation.
print_docs_reference()
{
	echo >&2 "***"
	echo >&2 "*** Please see Documentation/rust/quick-start.rst for details"
	echo >&2 "*** on how to set up the Rust support."
	echo >&2 "***"
}

# Print an explanation about the fact that the script is meant to be called from Kbuild.
print_kbuild_explanation()
{
	echo >&2 "***"
	echo >&2 "*** This script is intended to be called from Kbuild."
	echo >&2 "*** Please use the 'rustavailable' target to call it instead."
	echo >&2 "*** Otherwise, the results may not be meaningful."
	exit 1
}

# If the script fails for any reason, or if there was any warning, then
# print a reference to the documentation on exit.
warning=0
trap 'if [ $? -ne 0 ] || [ $warning -ne 0 ]; then print_docs_reference; fi' EXIT

# Check that the expected environment variables are set.
if [ -z "${RUSTC+x}" ]; then
	echo >&2 "***"
	echo >&2 "*** Environment variable 'RUSTC' is not set."
	print_kbuild_explanation
fi

if [ -z "${BINDGEN+x}" ]; then
	echo >&2 "***"
	echo >&2 "*** Environment variable 'BINDGEN' is not set."
	print_kbuild_explanation
fi

if [ -z "${CC+x}" ]; then
	echo >&2 "***"
	echo >&2 "*** Environment variable 'CC' is not set."
	print_kbuild_explanation
fi

# Check that the Rust compiler exists.
if ! command -v "$RUSTC" >/dev/null; then
	echo >&2 "***"
	echo >&2 "*** Rust compiler '$RUSTC' could not be found."
	echo >&2 "***"
	exit 1
fi

# Check that the Rust bindings generator exists.
if ! command -v "$BINDGEN" >/dev/null; then
	echo >&2 "***"
	echo >&2 "*** Rust bindings generator '$BINDGEN' could not be found."
	echo >&2 "***"
	exit 1
fi

# Check that the Rust compiler version is suitable.
#
# Non-stable and distributions' versions may have a version suffix, e.g. `-dev`.
rust_compiler_output=$( \
	LC_ALL=C "$RUSTC" --version 2>/dev/null
) || rust_compiler_code=$?
if [ -n "$rust_compiler_code" ]; then
	echo >&2 "***"
	echo >&2 "*** Running '$RUSTC' to check the Rust compiler version failed with"
	echo >&2 "*** code $rust_compiler_code. See output and docs below for details:"
	echo >&2 "***"
	echo >&2 "$rust_compiler_output"
	echo >&2 "***"
	exit 1
fi
rust_compiler_version=$( \
	echo "$rust_compiler_output" \
		| sed -nE '1s:.*rustc ([0-9]+\.[0-9]+\.[0-9]+).*:\1:p'
)
if [ -z "$rust_compiler_version" ]; then
	echo >&2 "***"
	echo >&2 "*** Running '$RUSTC' to check the Rust compiler version did not return"
	echo >&2 "*** an expected output. See output and docs below for details:"
	echo >&2 "***"
	echo >&2 "$rust_compiler_output"
	echo >&2 "***"
	exit 1
fi
rust_compiler_min_version=$($min_tool_version rustc)
rust_compiler_cversion=$(get_canonical_version $rust_compiler_version)
rust_compiler_min_cversion=$(get_canonical_version $rust_compiler_min_version)
if [ "$rust_compiler_cversion" -lt "$rust_compiler_min_cversion" ]; then
	echo >&2 "***"
	echo >&2 "*** Rust compiler '$RUSTC' is too old."
	echo >&2 "***   Your version:    $rust_compiler_version"
	echo >&2 "***   Minimum version: $rust_compiler_min_version"
	echo >&2 "***"
	exit 1
fi
if [ "$rust_compiler_cversion" -gt "$rust_compiler_min_cversion" ]; then
	echo >&2 "***"
	echo >&2 "*** Rust compiler '$RUSTC' is too new. This may or may not work."
	echo >&2 "***   Your version:     $rust_compiler_version"
	echo >&2 "***   Expected version: $rust_compiler_min_version"
	echo >&2 "***"
	warning=1
fi

# Check that the Rust bindings generator is suitable.
#
# Non-stable and distributions' versions may have a version suffix, e.g. `-dev`.
#
# 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).
rust_bindings_generator_output=$( \
	LC_ALL=C "$BINDGEN" --version workaround-for-0.69.0 2>/dev/null
) || rust_bindings_generator_code=$?
if [ -n "$rust_bindings_generator_code" ]; then
	echo >&2 "***"
	echo >&2 "*** Running '$BINDGEN' to check the Rust bindings generator version failed with"
	echo >&2 "*** code $rust_bindings_generator_code. See output and docs below for details:"
	echo >&2 "***"
	echo >&2 "$rust_bindings_generator_output"
	echo >&2 "***"
	exit 1
fi
rust_bindings_generator_version=$( \
	echo "$rust_bindings_generator_output" \
		| sed -nE '1s:.*bindgen ([0-9]+\.[0-9]+\.[0-9]+).*:\1:p'
)
if [ -z "$rust_bindings_generator_version" ]; then
	echo >&2 "***"
	echo >&2 "*** Running '$BINDGEN' to check the bindings generator version did not return"
	echo >&2 "*** an expected output. See output and docs below for details:"
	echo >&2 "***"
	echo >&2 "$rust_bindings_generator_output"
	echo >&2 "***"
	exit 1
fi
rust_bindings_generator_min_version=$($min_tool_version bindgen)
rust_bindings_generator_cversion=$(get_canonical_version $rust_bindings_generator_version)
rust_bindings_generator_min_cversion=$(get_canonical_version $rust_bindings_generator_min_version)
if [ "$rust_bindings_generator_cversion" -lt "$rust_bindings_generator_min_cversion" ]; then
	echo >&2 "***"
	echo >&2 "*** Rust bindings generator '$BINDGEN' is too old."
	echo >&2 "***   Your version:    $rust_bindings_generator_version"
	echo >&2 "***   Minimum version: $rust_bindings_generator_min_version"
	echo >&2 "***"
	exit 1
fi
if [ "$rust_bindings_generator_cversion" -gt "$rust_bindings_generator_min_cversion" ]; then
	echo >&2 "***"
	echo >&2 "*** Rust bindings generator '$BINDGEN' is too new. This may or may not work."
	echo >&2 "***   Your version:     $rust_bindings_generator_version"
	echo >&2 "***   Expected version: $rust_bindings_generator_min_version"
	echo >&2 "***"
	warning=1
fi

# Check that the `libclang` used by the Rust bindings generator is suitable.
#
# In order to do that, first invoke `bindgen` to get the `libclang` version
# found by `bindgen`. This step may already fail if, for instance, `libclang`
# is not found, thus inform the user in such a case.
bindgen_libclang_output=$( \
	LC_ALL=C "$BINDGEN" $(dirname $0)/rust_is_available_bindgen_libclang.h 2>&1 >/dev/null
) || bindgen_libclang_code=$?
if [ -n "$bindgen_libclang_code" ]; then
	echo >&2 "***"
	echo >&2 "*** Running '$BINDGEN' to check the libclang version (used by the Rust"
	echo >&2 "*** bindings generator) failed with code $bindgen_libclang_code. This may be caused by"
	echo >&2 "*** a failure to locate libclang. See output and docs below for details:"
	echo >&2 "***"
	echo >&2 "$bindgen_libclang_output"
	echo >&2 "***"
	exit 1
fi

# `bindgen` returned successfully, thus use the output to check that the version
# of the `libclang` found by the Rust bindings generator is suitable.
#
# Unlike other version checks, note that this one does not necessarily appear
# in the first line of the output, thus no `sed` address is provided.
bindgen_libclang_version=$( \
	echo "$bindgen_libclang_output" \
		| sed -nE 's:.*clang version ([0-9]+\.[0-9]+\.[0-9]+).*:\1:p'
)
if [ -z "$bindgen_libclang_version" ]; then
	echo >&2 "***"
	echo >&2 "*** Running '$BINDGEN' to check the libclang version (used by the Rust"
	echo >&2 "*** bindings generator) did not return an expected output. See output"
	echo >&2 "*** and docs below for details:"
	echo >&2 "***"
	echo >&2 "$bindgen_libclang_output"
	echo >&2 "***"
	exit 1
fi
bindgen_libclang_min_version=$($min_tool_version llvm)
bindgen_libclang_cversion=$(get_canonical_version $bindgen_libclang_version)
bindgen_libclang_min_cversion=$(get_canonical_version $bindgen_libclang_min_version)
if [ "$bindgen_libclang_cversion" -lt "$bindgen_libclang_min_cversion" ]; then
	echo >&2 "***"
	echo >&2 "*** libclang (used by the Rust bindings generator '$BINDGEN') is too old."
	echo >&2 "***   Your version:    $bindgen_libclang_version"
	echo >&2 "***   Minimum version: $bindgen_libclang_min_version"
	echo >&2 "***"
	exit 1
fi

# If the C compiler is Clang, then we can also check whether its version
# matches the `libclang` version used by the Rust bindings generator.
#
# In the future, we might be able to perform a full version check, see
# https://github.com/rust-lang/rust-bindgen/issues/2138.
cc_name=$($(dirname $0)/cc-version.sh $CC | cut -f1 -d' ')
if [ "$cc_name" = Clang ]; then
	clang_version=$( \
		LC_ALL=C $CC --version 2>/dev/null \
			| sed -nE '1s:.*version ([0-9]+\.[0-9]+\.[0-9]+).*:\1:p'
	)
	if [ "$clang_version" != "$bindgen_libclang_version" ]; then
		echo >&2 "***"
		echo >&2 "*** libclang (used by the Rust bindings generator '$BINDGEN')"
		echo >&2 "*** version does not match Clang's. This may be a problem."
		echo >&2 "***   libclang version: $bindgen_libclang_version"
		echo >&2 "***   Clang version:    $clang_version"
		echo >&2 "***"
		warning=1
	fi
fi

# Check that the source code for the `core` standard library exists.
#
# `$KRUSTFLAGS` is passed in case the user added `--sysroot`.
rustc_sysroot=$("$RUSTC" $KRUSTFLAGS --print sysroot)
rustc_src=${RUST_LIB_SRC:-"$rustc_sysroot/lib/rustlib/src/rust/library"}
rustc_src_core="$rustc_src/core/src/lib.rs"
if [ ! -e "$rustc_src_core" ]; then
	echo >&2 "***"
	echo >&2 "*** Source code for the 'core' standard library could not be found"
	echo >&2 "*** at '$rustc_src_core'."
	echo >&2 "***"
	exit 1
fi