[rust] Add android_dylib cfg flag
Adds an android_dylib cfg when building a Rust crate as a dylib. This
cfg lets us make the hack to add a dependency on std for the
panic_handler and eh_personality conditional on actually building a
dylib.
Test: m nothing
Bug: 193087363
Change-Id: Idad5b98245264f916afa327812a435b368f99321
diff --git a/rust/library.go b/rust/library.go
index 747a29d..5a36bd1 100644
--- a/rust/library.go
+++ b/rust/library.go
@@ -431,6 +431,12 @@
func (library *libraryDecorator) compilerFlags(ctx ModuleContext, flags Flags) Flags {
flags.RustFlags = append(flags.RustFlags, "-C metadata="+ctx.ModuleName())
+ if library.dylib() {
+ // We need to add a dependency on std in order to link crates as dylibs.
+ // The hack to add this dependency is guarded by the following cfg so
+ // that we don't force a dependency when it isn't needed.
+ library.baseCompiler.Properties.Cfgs = append(library.baseCompiler.Properties.Cfgs, "android_dylib")
+ }
flags = library.baseCompiler.compilerFlags(ctx, flags)
if library.shared() || library.static() {
library.includeDirs = append(library.includeDirs, android.PathsForModuleSrc(ctx, library.Properties.Include_dirs)...)
diff --git a/rust/library_test.go b/rust/library_test.go
index 54cd2a5..cb4ef7e 100644
--- a/rust/library_test.go
+++ b/rust/library_test.go
@@ -85,6 +85,22 @@
}
}
+// Check that we are passing the android_dylib config flag
+func TestAndroidDylib(t *testing.T) {
+ ctx := testRust(t, `
+ rust_library_host_dylib {
+ name: "libfoo",
+ srcs: ["foo.rs"],
+ crate_name: "foo",
+ }`)
+
+ libfooDylib := ctx.ModuleForTests("libfoo", "linux_glibc_x86_64_dylib").Output("libfoo.dylib.so")
+
+ if !strings.Contains(libfooDylib.Args["rustcFlags"], "--cfg 'android_dylib'") {
+ t.Errorf("missing android_dylib cfg flag for libfoo dylib, rustcFlags: %#v", libfooDylib.Args["rustcFlags"])
+ }
+}
+
func TestValidateLibraryStem(t *testing.T) {
testRustError(t, "crate_name must be defined.", `
rust_library_host {