build: add support for rustc_wrapper
Fixes
@@ -2,6 +2,10 @@ declare_args() {
# Absolute path of rust build files.
rust_build = "//build_extra/rust/"
+ # Wrapper executable for rustc invocations. This can be used for a caching
+ # utility, e.g. sccache.
+ rustc_wrapper = ""
+
# treat the warnings in rust files as errors
rust_treat_warnings_as_errors = true
}
@@ -114,7 +118,13 @@ template("run_rustc") {
]
depfile = "$out_dir/$crate_name$crate_suffix.d"
- args = [
+ if (rustc_wrapper != "") {
+ args = [ rustc_wrapper ]
+ } else {
+ args = []
+ }
+
+ args += [
"rustc",
rebase_path(source_root, root_build_dir),
"--crate-name=$crate_name",
