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package/rust: set musl-root for musl toolchains

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Without musl-root in config.toml the build stop with the following error:

thread 'main' panicked at 'couldn't find libc.a in musl libdir: output/host/arm-buildroot-linux-musleabihf/sysroot/lib/lib', src/bootstrap/sanity.rs:192:25

musl-root is needed to provide the path to libc.a and libunwind.a because
rust link them statically into the standard library and liblibc [1].

For other libc, musl-root is not used and ignored [2].

[1] cd980b3bee
[2] https://github.com/rust-lang/rust/blob/1.58.1/src/bootstrap/sanity.rs#L181

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit a41b0f31de)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Romain Naour
2022-02-25 09:30:37 +01:00
committed by Peter Korsgaard
parent 44db0dba59
commit 46c073662b
1 changed files with 1 additions and 0 deletions
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package/rust/rust.mk
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@@ -56,6 +56,7 @@ define HOST_RUST_CONFIGURE_CMDS
echo 'sysconfdir = "$(HOST_DIR)/etc"'; \
echo '[rust]'; \
echo 'channel = "stable"'; \
echo 'musl-root = "$(STAGING_DIR)"' ; \
echo '[target.$(RUSTC_TARGET_NAME)]'; \
echo 'cc = "$(TARGET_CROSS)gcc"'; \
echo '[llvm]'; \