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Revert "Fix missing libLLVM.so in stage0 sysroot."

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This reverts commit 8b9c5396ca574fad9cc7b51d16c8c96e0ae74632.
This commit is contained in:
Josh Stone 2020-03-18 14:07:41 -07:00
parent 0536b8dcaa
commit e1a6a306ad
1 changed files with 0 additions and 38 deletions
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38
src/bootstrap/compile.rs
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@ -451,44 +451,6 @@ impl Step for Rustc {
false,
);
// We used to build librustc_codegen_llvm as a separate step,
// which produced a dylib that the compiler would dlopen() at runtime.
// This meant that we only needed to make sure that libLLVM.so was
// installed by the time we went to run a tool using it - since
// librustc_codegen_llvm was effectively a standalone artifact,
// other crates were completely oblivious to its dependency
// on `libLLVM.so` during build time.
//
// However, librustc_codegen_llvm is now built as an ordinary
// crate during the same step as the rest of the compiler crates.
// This means that any crates depending on it will see the fact
// that it uses `libLLVM.so` as a native library, and will
// cause us to pass `-llibLLVM.so` to the linker when we link
// a binary.
//
// For `rustc` itself, this works out fine.
// During the `Assemble` step, we call `dist::maybe_install_llvm_dylib`
// to copy libLLVM.so into the `stage` directory. We then link
// the compiler binary, which will find `libLLVM.so` in the correct place.
//
// However, this is insufficient for tools that are build against stage0
// (e.g. stage1 rustdoc). Since `Assemble` for stage0 doesn't actually do anything,
// we won't have `libLLVM.so` in the stage0 sysroot. In the past, this wasn't
// a problem - we would copy the tool binary into its correct stage directory
// (e.g. stage1 for a stage1 rustdoc built against a stage0 compiler).
// Since libLLVM.so wasn't resolved until runtime, it was fine for it to
// not exist while we were building it.
//
// To ensure that we can still build stage1 tools against a stage0 compiler,
// we explicitly copy libLLVM.so into the stage0 sysroot when building
// the stage0 compiler. This ensures that tools built against stage0
// will see libLLVM.so at build time, making the linker happy.
if compiler.stage == 0 {
builder.info(&format!("Installing libLLVM.so to stage 0 ({})", compiler.host));
let sysroot = builder.sysroot(compiler);
dist::maybe_install_llvm_dylib(builder, compiler.host, &sysroot);
}
builder.ensure(RustcLink {
compiler: builder.compiler(compiler.stage, builder.config.build),
target_compiler: compiler,