Merge "Keep only out file dependency rule in output .d files"
diff --git a/rust/builder.go b/rust/builder.go
index 45cd268..654b1e6 100644
--- a/rust/builder.go
+++ b/rust/builder.go
@@ -31,9 +31,14 @@
Command: "$envVars $rustcCmd " +
"-C linker=${config.RustLinker} " +
"-C link-args=\"${crtBegin} ${config.RustLinkerArgs} ${linkFlags} ${crtEnd}\" " +
- "--emit link -o $out --emit dep-info=$out.d $in ${libFlags} $rustcFlags",
+ "--emit link -o $out --emit dep-info=$out.d.raw $in ${libFlags} $rustcFlags" +
+ " && grep \"^$out:\" $out.d.raw > $out.d",
CommandDeps: []string{"$rustcCmd"},
// Rustc deps-info writes out make compatible dep files: https://github.com/rust-lang/rust/issues/7633
+ // Rustc emits unneeded dependency lines for the .d and input .rs files.
+ // Those extra lines cause ninja warning:
+ // "warning: depfile has multiple output paths"
+ // For ninja, we keep/grep only the dependency rule for the rust $out file.
Deps: blueprint.DepsGCC,
Depfile: "$out.d",
},