From 22cef966e1552575f891ea77bf0151555a207056 Mon Sep 17 00:00:00 2001
From: Matthew Maurer <mmaurer@google.com>
Date: Mon, 13 Jan 2020 16:31:13 -0800
Subject: rust: Include Soong module name as metadata

If we want to build a component which uses two versions of a crate in
the dependency graph (for example, libc in std and libc from
external/crates), Rust requires at least one of them have a metadata
field to differentiate them.

Since Soong module names should be distinct for a given target, they
should serve as metadata.

Bug: 147397356
Test: Build a rust library with "rlibs: ["liblibc"]" in the blueprint
Change-Id: I5d85ea8b3197972c09de301c9523efaff08adf81
---
 rust/library.go | 1 +
 1 file changed, 1 insertion(+)

(limited to 'rust/library.go')

diff --git a/rust/library.go b/rust/library.go
index 43819cef7..2844e70d9 100644
--- a/rust/library.go
+++ b/rust/library.go
@@ -323,6 +323,7 @@ func (library *libraryDecorator) compilerDeps(ctx DepsContext, deps Deps) Deps {
 	return deps
 }
 func (library *libraryDecorator) compilerFlags(ctx ModuleContext, flags Flags) Flags {
+	flags.RustFlags = append(flags.RustFlags, "-C metadata="+ctx.baseModuleName())
 	flags = library.baseCompiler.compilerFlags(ctx, flags)
 	if library.shared() || library.static() {
 		library.includeDirs = append(library.includeDirs, android.PathsForModuleSrc(ctx, library.Properties.Include_dirs)...)
-- 
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