Fix usage of use_cc_toolchain in cc_toolchain_alias.bzl

hvadehra · copybara-github · commit 66542a117472 · 2025-09-12T05:07:04.000-07:00
The [builtins version](https://github.com/bazelbuild/bazel/blob/c7e4effeb25a46b8c9f86cac54576b9f771669ed/src/main/starlark/builtins_bzl/common/cc/cc_toolchain_alias.bzl#L51) defaults to `mandatory = False`, [see impl](https://github.com/bazelbuild/bazel/blob/c7e4effeb25a46b8c9f86cac54576b9f771669ed/src/main/starlark/builtins_bzl/common/cc/cc_helper.bzl#L80) PiperOrigin-RevId: 806242359 Change-Id: I2f8355bdf3a2cf238c3305760429e91b36a150f9
diff --git a/cc/private/rules_impl/cc_toolchain_alias.bzl b/cc/private/rules_impl/cc_toolchain_alias.bzl
@@ -49,5 +49,5 @@ cc_toolchain_alias = rule(
     attrs = {
         "mandatory": attr.bool(default = True),
     },
-    toolchains = use_cc_toolchain() + semantics.get_runtimes_toolchain(),
+    toolchains = use_cc_toolchain(mandatory = False) + semantics.get_runtimes_toolchain(),
 )

Original file line number	Diff line number	Diff line change
`@@ -49,5 +49,5 @@ cc_toolchain_alias = rule(`
`49`	`49`	`attrs = {`
`50`	`50`	`"mandatory": attr.bool(default = True),`
`51`	`51`	`},`
`52`		`- toolchains = use_cc_toolchain() + semantics.get_runtimes_toolchain(),`
	`52`	`+ toolchains = use_cc_toolchain(mandatory = False) + semantics.get_runtimes_toolchain(),`
`53`	`53`	`)`