compiler/rustc_target/src/spec/illumos_base.rs

   1 use crate::spec::{LinkArgs, LinkerFlavor, TargetOptions};
   2 use std::default::Default;
   3
   4 pub fn opts() -> TargetOptions {
   5     let mut late_link_args = LinkArgs::new();
   6     late_link_args.insert(
   7         LinkerFlavor::Gcc,
   8         vec![
   9             // The illumos libc contains a stack unwinding implementation, as
  10             // does libgcc_s.  The latter implementation includes several
  11             // additional symbols that are not always in base libc.  To force
  12             // the consistent use of just one unwinder, we ensure libc appears
  13             // after libgcc_s in the NEEDED list for the resultant binary by
  14             // ignoring any attempts to add it as a dynamic dependency until the
  15             // very end.
  16             // FIXME: This should be replaced by a more complete and generic
  17             // mechanism for controlling the order of library arguments passed
  18             // to the linker.
  19             "-lc".to_string(),
  20             // LLVM will insert calls to the stack protector functions
  21             // "__stack_chk_fail" and "__stack_chk_guard" into code in native
  22             // object files.  Some platforms include these symbols directly in
  23             // libc, but at least historically these have been provided in
  24             // libssp.so on illumos and Solaris systems.
  25             "-lssp".to_string(),
  26         ],
  27     );
  28
  29     TargetOptions {
  30         os: "illumos".to_string(),
  31         dynamic_linking: true,
  32         executables: true,
  33         has_rpath: true,
  34         families: vec!["unix".to_string()],
  35         is_like_solaris: true,
  36         linker_is_gnu: false,
  37         limit_rdylib_exports: false, // Linker doesn't support this
  38         eliminate_frame_pointer: false,
  39         eh_frame_header: false,
  40         late_link_args,
  41
  42         // While we support ELF TLS, rust requires a way to register
  43         // cleanup handlers (in C, this would be something along the lines of:
  44         // void register_callback(void (*fn)(void *), void *arg);
  45         // (see src/libstd/sys/unix/fast_thread_local.rs) that is currently
  46         // missing in illumos.  For now at least, we must fallback to using
  47         // pthread_{get,set}specific.
  48         //has_elf_tls: true,
  49
  50         // FIXME: Currently, rust is invoking cc to link, which ends up
  51         // causing these to get included twice.  We should eventually transition
  52         // to having rustc invoke ld directly, in which case these will need to
  53         // be uncommented.
  54         //
  55         // We want XPG6 behavior from libc and libm.  See standards(5)
  56         //pre_link_objects_exe: vec![
  57         //    "/usr/lib/amd64/values-Xc.o".to_string(),
  58         //    "/usr/lib/amd64/values-xpg6.o".to_string(),
  59         //],
  60         ..Default::default()
  61     }
  62 }