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From 8f2821b37da4fe2710e1bf7944765a5c2cf8d98c Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel@sholland.org>
Date: Fri, 8 Sep 2017 00:05:18 -0500
Subject: [PATCH 04/18] Require static native libraries when linking static
executables
On ELF targets like Linux, gcc/ld will create a dynamically-linked
executable without warning, even when passed `-static`, when asked to
link to a `.so`. Avoid this confusing and unintended behavior by always
using the static version of libraries when trying to link static
executables.
Fixes #54243
---
src/librustc_codegen_ssa/back/link.rs | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/src/librustc_codegen_ssa/back/link.rs b/src/librustc_codegen_ssa/back/link.rs
index 8fb0828285c..2d8a0b86076 100644
--- a/src/librustc_codegen_ssa/back/link.rs
+++ b/src/librustc_codegen_ssa/back/link.rs
@@ -1567,9 +1567,7 @@ fn add_upstream_rust_crates<'a, B: ArchiveBuilder<'a>>(cmd: &mut dyn Linker,
}
}
-// Link in all of our upstream crates' native dependencies. Remember that
-// all of these upstream native dependencies are all non-static
-// dependencies. We've got two cases then:
+// Link in all of our upstream crates' native dependencies. We have two cases:
//
// 1. The upstream crate is an rlib. In this case we *must* link in the
// native dependency because the rlib is just an archive.
@@ -1612,7 +1610,19 @@ pub fn add_upstream_native_libraries(cmd: &mut dyn Linker,
continue
}
match lib.kind {
- NativeLibraryKind::NativeUnknown => cmd.link_dylib(&name.as_str()),
+ NativeLibraryKind::NativeUnknown => {
+ // On some targets, like Linux, linking a static executable inhibits using
+ // dylibs at all. Force native libraries to be static, even if for example
+ // an upstream rlib was originally linked against a native shared library.
+ if crate_type == config::CrateType::Executable
+ && sess.crt_static()
+ && !sess.target.target.options.crt_static_allows_dylibs
+ {
+ cmd.link_staticlib(&name.as_str())
+ } else {
+ cmd.link_dylib(&name.as_str())
+ }
+ },
NativeLibraryKind::NativeFramework => cmd.link_framework(&name.as_str()),
NativeLibraryKind::NativeStaticNobundle => {
// Link "static-nobundle" native libs only if the crate they originate from
--
2.21.0
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