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A-linkageArea: linking into static, shared libraries and binariesArea: linking into static, shared libraries and binariesC-bugCategory: This is a bug.Category: This is a bug.O-PowerPCTarget: PowerPC processorsTarget: PowerPC processorsneeds-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.
Description
Newly introduced test by this commit fails for powerpc target.
The code used from this issue report also fails to link on powerpc target, due to unresolved symbols.
I tried this code:
// src/main.rs
unsafe extern "C" {
unsafe static UNDEFINED: usize;
}
#[unsafe(no_mangle)]
pub fn used() {
println!("UNDEFINED = {}", unsafe { UNDEFINED });
}
pub fn marker() -> usize {
0
}
fn main() {
assert_eq!(marker(), 0_usize);
}
cargo build --target powerpc-unknown-linux-gnu
I expected to see this happen: it builds
Instead, this happened: it emits linker errors
error: linking with `powerpc-linux-gnu-gcc` failed: exit status: 1
|
= note: "powerpc-linux-gnu-gcc" "-m32" "/tmp/rustcgCiFys/symbols.o" "<8 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/powerpc-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,libcfg_if-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/tmp/rustcgCiFys/raw-dylibs" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/powerpc-unknown-linux-gnu/lib" "-o" "/home/projects/rust-test/target/powerpc-unknown-linux-gnu/debug/deps/test_rust-3c4b8a270f49f452" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
= note: some arguments are omitted. use `--verbose` to show all linker arguments
= note: /usr/lib/gcc-cross/powerpc-linux-gnu/12/../../../../powerpc-linux-gnu/bin/ld: /home/projects/rust-test/target/powerpc-unknown-linux-gnu/debug/deps/test_rust-3c4b8a270f49f452.42850mbhj0t4hj3povrah4dmz.1ofm0p2.rcgu.o:(.got2+0x0): undefined reference to `UNDEFINED'
collect2: error: ld returned 1 exit status
= note: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
= note: use the `-l` flag to specify native libraries to link
= note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#rustc-link-lib)
error: could not compile `test-rust` (bin "test-rust") due to 1 previous error
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rustc --version --verbose
:
rustc 1.88.0 (6b00bc388 2025-06-23)
petermarko
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A-linkageArea: linking into static, shared libraries and binariesArea: linking into static, shared libraries and binariesC-bugCategory: This is a bug.Category: This is a bug.O-PowerPCTarget: PowerPC processorsTarget: PowerPC processorsneeds-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.