Merge "Make building Rust targets faster in eng builds" into main (3fae67a3) · Commits · e / os / android_build_soong

rust/builder.go

+15 −15

Original line number	Diff line number	Diff line
		@@ -122,8 +122,6 @@ func init() {

		func TransformSrcToBinary(ctx ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
		outputFile android.WritablePath) buildOutput {
		flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto=thin")

		return transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "bin")
		}

		@@ -134,20 +132,16 @@ func TransformSrctoRlib(ctx ModuleContext, mainSrc android.Path, deps PathDeps,

		func TransformSrctoDylib(ctx ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
		outputFile android.WritablePath) buildOutput {
		flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto=thin")

		return transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "dylib")
		}

		func TransformSrctoStatic(ctx ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
		outputFile android.WritablePath) buildOutput {
		flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto=thin")
		return transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "staticlib")
		}

		func TransformSrctoShared(ctx ModuleContext, mainSrc android.Path, deps PathDeps, flags Flags,
		outputFile android.WritablePath) buildOutput {
		flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto=thin")
		return transformSrctoCrate(ctx, mainSrc, deps, flags, outputFile, "cdylib")
		}

		@@ -263,6 +257,21 @@ func transformSrctoCrate(ctx ModuleContext, main android.Path, deps PathDeps, fl

		inputs = append(inputs, main)

		if ctx.Config().Eng() {
		// Per https://doc.rust-lang.org/rustc/codegen-options/index.html#codegen-units
		// incremental building implies codegen-units=256
		incrementalPath := android.PathForModuleOut(ctx, "rustc-incremental").String()
		flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C incremental="+incrementalPath)

		} else {
		flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C codegen-units=1")

		if !(ctx.RustModule().Rlib() \|\| ctx.RustModule().ProcMacro()) {
		flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-Z dylib-lto")
		flags.GlobalRustFlags = append(flags.GlobalRustFlags, "-C lto=thin")
		}
		}

		// Collect rustc flags
		rustcFlags = append(rustcFlags, flags.GlobalRustFlags...)
		rustcFlags = append(rustcFlags, flags.RustFlags...)
		@@ -278,15 +287,6 @@ func transformSrctoCrate(ctx ModuleContext, main android.Path, deps PathDeps, fl
		// Suppress an implicit sysroot
		rustcFlags = append(rustcFlags, "--sysroot=/dev/null")

		// Enable incremental compilation if requested by user
		if ctx.Config().IsEnvTrue("SOONG_RUSTC_INCREMENTAL") {
		incrementalPath := android.PathForOutput(ctx, "rustc").String()

		rustcFlags = append(rustcFlags, "-C incremental="+incrementalPath)
		} else {
		rustcFlags = append(rustcFlags, "-C codegen-units=1")
		}

		// Disallow experimental features
		modulePath := ctx.ModuleDir()
		if !(android.IsThirdPartyPath(modulePath) \|\| strings.HasPrefix(modulePath, "prebuilts")) {