diff options
Diffstat (limited to 'src/bootstrap/compile.rs')
| -rw-r--r-- | src/bootstrap/compile.rs | 148 |
1 files changed, 78 insertions, 70 deletions
diff --git a/src/bootstrap/compile.rs b/src/bootstrap/compile.rs index 85d1c12cc6a..d96e10485c2 100644 --- a/src/bootstrap/compile.rs +++ b/src/bootstrap/compile.rs @@ -696,7 +696,7 @@ impl Step for Rustc { )); let mut cargo = builder.cargo(compiler, Mode::Rustc, SourceType::InTree, target, "build"); - rustc_cargo(builder, &mut cargo, target); + rustc_cargo(builder, &mut cargo, target, compiler.stage); if builder.config.rust_profile_use.is_some() && builder.config.rust_profile_generate.is_some() @@ -813,16 +813,21 @@ impl Step for Rustc { } } -pub fn rustc_cargo(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetSelection) { +pub fn rustc_cargo(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetSelection, stage: u32) { cargo .arg("--features") .arg(builder.rustc_features(builder.kind)) .arg("--manifest-path") .arg(builder.src.join("compiler/rustc/Cargo.toml")); - rustc_cargo_env(builder, cargo, target); + rustc_cargo_env(builder, cargo, target, stage); } -pub fn rustc_cargo_env(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetSelection) { +pub fn rustc_cargo_env( + builder: &Builder<'_>, + cargo: &mut Cargo, + target: TargetSelection, + stage: u32, +) { // Set some configuration variables picked up by build scripts and // the compiler alike cargo @@ -867,83 +872,86 @@ pub fn rustc_cargo_env(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetS cargo.env("RUSTC_VERIFY_LLVM_IR", "1"); } - // Pass down configuration from the LLVM build into the build of - // rustc_llvm and rustc_codegen_llvm. - // // Note that this is disabled if LLVM itself is disabled or we're in a check // build. If we are in a check build we still go ahead here presuming we've // detected that LLVM is already built and good to go which helps prevent // busting caches (e.g. like #71152). - if builder.config.llvm_enabled() - && (builder.kind != Kind::Check - || crate::llvm::prebuilt_llvm_config(builder, target).is_ok()) - { - if builder.is_rust_llvm(target) { - cargo.env("LLVM_RUSTLLVM", "1"); - } - let llvm::LlvmResult { llvm_config, .. } = builder.ensure(llvm::Llvm { target }); - cargo.env("LLVM_CONFIG", &llvm_config); - if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) { - cargo.env("CFG_LLVM_ROOT", s); + if builder.config.llvm_enabled() { + let building_is_expensive = crate::llvm::prebuilt_llvm_config(builder, target).is_err(); + // `top_stage == stage` might be false for `check --stage 1`, if we are building the stage 1 compiler + let can_skip_build = builder.kind == Kind::Check && builder.top_stage == stage; + let should_skip_build = building_is_expensive && can_skip_build; + if !should_skip_build { + rustc_llvm_env(builder, cargo, target) } + } +} - // Some LLVM linker flags (-L and -l) may be needed to link `rustc_llvm`. Its build script - // expects these to be passed via the `LLVM_LINKER_FLAGS` env variable, separated by - // whitespace. - // - // For example: - // - on windows, when `clang-cl` is used with instrumentation, we need to manually add - // clang's runtime library resource directory so that the profiler runtime library can be - // found. This is to avoid the linker errors about undefined references to - // `__llvm_profile_instrument_memop` when linking `rustc_driver`. - let mut llvm_linker_flags = String::new(); - if builder.config.llvm_profile_generate && target.contains("msvc") { - if let Some(ref clang_cl_path) = builder.config.llvm_clang_cl { - // Add clang's runtime library directory to the search path - let clang_rt_dir = get_clang_cl_resource_dir(clang_cl_path); - llvm_linker_flags.push_str(&format!("-L{}", clang_rt_dir.display())); - } - } +/// Pass down configuration from the LLVM build into the build of +/// rustc_llvm and rustc_codegen_llvm. +fn rustc_llvm_env(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetSelection) { + let target_config = builder.config.target_config.get(&target); - // The config can also specify its own llvm linker flags. - if let Some(ref s) = builder.config.llvm_ldflags { - if !llvm_linker_flags.is_empty() { - llvm_linker_flags.push_str(" "); - } - llvm_linker_flags.push_str(s); + if builder.is_rust_llvm(target) { + cargo.env("LLVM_RUSTLLVM", "1"); + } + let llvm::LlvmResult { llvm_config, .. } = builder.ensure(llvm::Llvm { target }); + cargo.env("LLVM_CONFIG", &llvm_config); + if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) { + cargo.env("CFG_LLVM_ROOT", s); + } + + // Some LLVM linker flags (-L and -l) may be needed to link `rustc_llvm`. Its build script + // expects these to be passed via the `LLVM_LINKER_FLAGS` env variable, separated by + // whitespace. + // + // For example: + // - on windows, when `clang-cl` is used with instrumentation, we need to manually add + // clang's runtime library resource directory so that the profiler runtime library can be + // found. This is to avoid the linker errors about undefined references to + // `__llvm_profile_instrument_memop` when linking `rustc_driver`. + let mut llvm_linker_flags = String::new(); + if builder.config.llvm_profile_generate && target.contains("msvc") { + if let Some(ref clang_cl_path) = builder.config.llvm_clang_cl { + // Add clang's runtime library directory to the search path + let clang_rt_dir = get_clang_cl_resource_dir(clang_cl_path); + llvm_linker_flags.push_str(&format!("-L{}", clang_rt_dir.display())); } + } - // Set the linker flags via the env var that `rustc_llvm`'s build script will read. + // The config can also specify its own llvm linker flags. + if let Some(ref s) = builder.config.llvm_ldflags { if !llvm_linker_flags.is_empty() { - cargo.env("LLVM_LINKER_FLAGS", llvm_linker_flags); + llvm_linker_flags.push_str(" "); } + llvm_linker_flags.push_str(s); + } - // Building with a static libstdc++ is only supported on linux right now, - // not for MSVC or macOS - if builder.config.llvm_static_stdcpp - && !target.contains("freebsd") - && !target.contains("msvc") - && !target.contains("apple") - && !target.contains("solaris") - { - let file = compiler_file( - builder, - builder.cxx(target).unwrap(), - target, - CLang::Cxx, - "libstdc++.a", - ); - cargo.env("LLVM_STATIC_STDCPP", file); - } - if builder.llvm_link_shared() { - cargo.env("LLVM_LINK_SHARED", "1"); - } - if builder.config.llvm_use_libcxx { - cargo.env("LLVM_USE_LIBCXX", "1"); - } - if builder.config.llvm_optimize && !builder.config.llvm_release_debuginfo { - cargo.env("LLVM_NDEBUG", "1"); - } + // Set the linker flags via the env var that `rustc_llvm`'s build script will read. + if !llvm_linker_flags.is_empty() { + cargo.env("LLVM_LINKER_FLAGS", llvm_linker_flags); + } + + // Building with a static libstdc++ is only supported on linux right now, + // not for MSVC or macOS + if builder.config.llvm_static_stdcpp + && !target.contains("freebsd") + && !target.contains("msvc") + && !target.contains("apple") + && !target.contains("solaris") + { + let file = + compiler_file(builder, builder.cxx(target).unwrap(), target, CLang::Cxx, "libstdc++.a"); + cargo.env("LLVM_STATIC_STDCPP", file); + } + if builder.llvm_link_shared() { + cargo.env("LLVM_LINK_SHARED", "1"); + } + if builder.config.llvm_use_libcxx { + cargo.env("LLVM_USE_LIBCXX", "1"); + } + if builder.config.llvm_optimize && !builder.config.llvm_release_debuginfo { + cargo.env("LLVM_NDEBUG", "1"); } } @@ -1090,7 +1098,7 @@ impl Step for CodegenBackend { cargo .arg("--manifest-path") .arg(builder.src.join(format!("compiler/rustc_codegen_{}/Cargo.toml", backend))); - rustc_cargo_env(builder, &mut cargo, target); + rustc_cargo_env(builder, &mut cargo, target, compiler.stage); let tmp_stamp = out_dir.join(".tmp.stamp"); |