rustc_target/spec/base/
illumos.rs

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1use crate::spec::{Cc, FramePointer, LinkerFlavor, TargetOptions, cvs};
2
3pub(crate) fn opts() -> TargetOptions {
4    let late_link_args = TargetOptions::link_args(
5        LinkerFlavor::Unix(Cc::Yes),
6        &[
7            // The illumos libc contains a stack unwinding implementation, as
8            // does libgcc_s. The latter implementation includes several
9            // additional symbols that are not always in base libc. To force
10            // the consistent use of just one unwinder, we ensure libc appears
11            // after libgcc_s in the NEEDED list for the resultant binary by
12            // ignoring any attempts to add it as a dynamic dependency until the
13            // very end.
14            // FIXME: This should be replaced by a more complete and generic
15            // mechanism for controlling the order of library arguments passed
16            // to the linker.
17            "-lc",
18            // LLVM will insert calls to the stack protector functions
19            // "__stack_chk_fail" and "__stack_chk_guard" into code in native
20            // object files. Some platforms include these symbols directly in
21            // libc, but at least historically these have been provided in
22            // libssp.so on illumos and Solaris systems.
23            "-lssp",
24        ],
25    );
26
27    TargetOptions {
28        os: "illumos".into(),
29        dynamic_linking: true,
30        has_rpath: true,
31        families: cvs!["unix"],
32        is_like_solaris: true,
33        linker_flavor: LinkerFlavor::Unix(Cc::Yes),
34        limit_rdylib_exports: false, // Linker doesn't support this
35        frame_pointer: FramePointer::Always,
36        eh_frame_header: false,
37        late_link_args,
38
39        // While we support ELF TLS, rust requires a way to register
40        // cleanup handlers (in C, this would be something along the lines of:
41        // void register_callback(void (*fn)(void *), void *arg);
42        // (see src/libstd/sys/pal/unix/fast_thread_local.rs) that is currently
43        // missing in illumos. For now at least, we must fallback to using
44        // pthread_{get,set}specific.
45        //has_thread_local: true,
46
47        // FIXME: Currently, rust is invoking cc to link, which ends up
48        // causing these to get included twice. We should eventually transition
49        // to having rustc invoke ld directly, in which case these will need to
50        // be uncommented.
51        //
52        // We want XPG6 behavior from libc and libm. See standards(5)
53        //pre_link_objects_exe: vec![
54        //    "/usr/lib/amd64/values-Xc.o".into(),
55        //    "/usr/lib/amd64/values-xpg6.o".into(),
56        //],
57        ..Default::default()
58    }
59}
rustc_target/spec/base/illumos.rs

rustc_target/spec/base/
illumos.rs
