diff --git a/tests/run-make/musl-default-linking/rmake.rs b/tests/run-make/musl-default-linking/rmake.rs new file mode 100644 index 000000000000..8ff0bb6376b9 --- /dev/null +++ b/tests/run-make/musl-default-linking/rmake.rs @@ -0,0 +1,60 @@ +use run_make_support::rustc; +use run_make_support::serde_json; + +// Please do NOT add more targets to this list! +// Per https://github.com/rust-lang/compiler-team/issues/422, +// we should be trying to move these targets to dynamically link +// musl libc by default. +static LEGACY_STATIC_LINKING_TARGETS: &[&'static str] = &[ + "aarch64-unknown-linux-musl", + "arm-unknown-linux-musleabi", + "arm-unknown-linux-musleabihf", + "armv5te-unknown-linux-musleabi", + "armv7-unknown-linux-musleabi", + "armv7-unknown-linux-musleabihf", + "i586-unknown-linux-musl", + "i686-unknown-linux-musl", + "mips64-unknown-linux-musl", + "mips64-unknown-linux-muslabi64", + "mips64el-unknown-linux-muslabi64", + "powerpc-unknown-linux-musl", + "powerpc-unknown-linux-muslspe", + "powerpc64-unknown-linux-musl", + "powerpc64le-unknown-linux-musl", + "riscv32gc-unknown-linux-musl", + "s390x-unknown-linux-musl", + "thumbv7neon-unknown-linux-musleabihf", + "x86_64-unknown-linux-musl", +]; + +fn main() { + let targets = rustc().print("target-list").run().stdout_utf8(); + + for target in targets.lines() { + let abi = target.split('-').last().unwrap(); + + if !abi.starts_with("musl") { + continue; + } + + let target_spec_json = + rustc() + .print("target-spec-json") + .target(target) + .arg("-Zunstable-options") + .run() + .stdout_utf8(); + + let target_spec: serde_json::Value = serde_json::from_str(&target_spec_json).expect("failed to parse target-spec-json"); + let default = &target_spec["crt-static-default"]; + + // If the value is `null`, then the default to dynamically link from musl_base was not overriden. + if default.is_null() { + continue; + } + + if default.as_bool().expect("wasn't a boolean") && !LEGACY_STATIC_LINKING_TARGETS.contains(&target) { + panic!("{target} statically links musl libc when it should dynamically link it"); + } + } +}