1 files changed, 37 insertions, 1 deletions

diff --git a/rust/compiler.go b/rust/compiler.go
index 0b28135ae..6b3ccfcfa 100644
--- a/rust/compiler.go
+++ b/rust/compiler.go
@@ -17,6 +17,7 @@ package rust
 import (
 	"fmt"
 	"path/filepath"
+	"strings"
 
 	"github.com/google/blueprint/proptools"
 
@@ -153,6 +154,14 @@ type BaseCompilerProperties struct {
 	// linkage if all dependencies of the root binary module do not link against libstd\
 	// the same way.
 	Prefer_rlib *bool `android:"arch_variant"`
+
+	// Enables emitting certain Cargo environment variables. Only intended to be used for compatibility purposes.
+	// Will set CARGO_CRATE_NAME to the crate_name property's value.
+	// Will set CARGO_BIN_NAME to the output filename value without the extension.
+	Cargo_env_compat *bool
+
+	// If cargo_env_compat is true, sets the CARGO_PKG_VERSION env var to this value.
+	Cargo_pkg_version *string
 }
 
 type baseCompiler struct {
@@ -235,6 +244,25 @@ func (compiler *baseCompiler) compilerFlags(ctx ModuleContext, flags Flags) Flag
 	if err != nil {
 		ctx.PropertyErrorf("lints", err.Error())
 	}
+
+	// linkage-related flags are disallowed.
+	for _, s := range compiler.Properties.Ld_flags {
+		if strings.HasPrefix(s, "-Wl,-l") || strings.HasPrefix(s, "-Wl,-L") {
+			ctx.PropertyErrorf("ld_flags", "'-Wl,-l' and '-Wl,-L' flags cannot be manually specified")
+		}
+	}
+	for _, s := range compiler.Properties.Flags {
+		if strings.HasPrefix(s, "-l") || strings.HasPrefix(s, "-L") {
+			ctx.PropertyErrorf("flags", "'-l' and '-L' flags cannot be manually specified")
+		}
+		if strings.HasPrefix(s, "--extern") {
+			ctx.PropertyErrorf("flags", "'--extern' flag cannot be manually specified")
+		}
+		if strings.HasPrefix(s, "-Clink-args=") || strings.HasPrefix(s, "-C link-args=") {
+			ctx.PropertyErrorf("flags", "'-C link-args' flag cannot be manually specified")
+		}
+	}
+
 	flags.RustFlags = append(flags.RustFlags, lintFlags)
 	flags.RustFlags = append(flags.RustFlags, compiler.Properties.Flags...)
 	flags.RustFlags = append(flags.RustFlags, compiler.cfgsToFlags()...)
@@ -289,6 +317,14 @@ func (compiler *baseCompiler) CargoOutDir() android.OptionalPath {
 	return android.OptionalPathForPath(compiler.cargoOutDir)
 }
 
+func (compiler *baseCompiler) CargoEnvCompat() bool {
+	return Bool(compiler.Properties.Cargo_env_compat)
+}
+
+func (compiler *baseCompiler) CargoPkgVersion() string {
+	return String(compiler.Properties.Cargo_pkg_version)
+}
+
 func (compiler *baseCompiler) strippedOutputFilePath() android.OptionalPath {
 	return compiler.strippedOutputFile
 }
@@ -305,7 +341,7 @@ func (compiler *baseCompiler) compilerDeps(ctx DepsContext, deps Deps) Deps {
 	if !Bool(compiler.Properties.No_stdlibs) {
 		for _, stdlib := range config.Stdlibs {
 			// If we're building for the primary arch of the build host, use the compiler's stdlibs
-			if ctx.Target().Os == android.BuildOs {
+			if ctx.Target().Os == ctx.Config().BuildOS {
 				stdlib = stdlib + "_" + ctx.toolchain().RustTriple()
 			}
 			deps.Stdlibs = append(deps.Stdlibs, stdlib)