[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)...)