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linker: Restore the old order of linking native libraries

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This commit is contained in:
Vadim Petrochenkov 2021-05-10 21:01:18 +03:00
parent b7994f9e7e
commit 5275bf1c1d
1 changed files with 12 additions and 4 deletions
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16
compiler/rustc_codegen_ssa/src/back/link.rs
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@ -1801,16 +1801,17 @@ fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
// such:
//
// 1. The local object that LLVM just generated
// 2. Upstream rust libraries
// 3. Local native libraries
// 2. Local native libraries
// 3. Upstream rust libraries
// 4. Upstream native libraries
//
// The rationale behind this ordering is that those items lower down in the
// list can't depend on items higher up in the list. For example nothing can
// depend on what we just generated (e.g., that'd be a circular dependency).
// Upstream rust libraries are not allowed to depend on our local native
// Upstream rust libraries are not supposed to depend on our local native
// libraries as that would violate the structure of the DAG, in that
// scenario they are required to link to them as well in a shared fashion.
// (The current implementation still doesn't prevent it though, see the FIXME below.)
//
// Note that upstream rust libraries may contain native dependencies as
// well, but they also can't depend on what we just started to add to the
@ -1821,6 +1822,14 @@ fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
add_local_crate_metadata_objects(cmd, crate_type, codegen_results);
add_local_crate_allocator_objects(cmd, codegen_results);
// FIXME: Move this below to other native libraries
// (or alternatively link all native libraries after their respective crates).
// This change is somewhat breaking in practice due to local static libraries being linked
// as whole-archive (#85144), so removing whole-archive may be a pre-requisite.
if sess.opts.debugging_opts.link_native_libraries {
add_local_native_libraries(cmd, sess, codegen_results);
}
// Rust libraries.
add_upstream_rust_crates::<B>(cmd, sess, codegen_results, crate_type, tmpdir);
@ -1829,7 +1838,6 @@ fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
// external build system already has the native dependencies defined, and it
// will provide them to the linker itself.
if sess.opts.debugging_opts.link_native_libraries {
add_local_native_libraries(cmd, sess, codegen_results);
add_upstream_native_libraries(cmd, sess, codegen_results, crate_type);
}