//build/toolchain/musl-host-gcc: implement
This is a cc_toolchain which runs on x86 systems with Linux/gcc and
targets Smalltown via static musl builds.
It is currently unused, but can be tested by trying to build any
cc_binary with
--crosstool_top=//build/toolchain/musl-host-gcc:musl_host_cc_suite .
Test Plan: This has been tested manually by running it against a simple cc_binary. Another revision on top of this will attempt to build mkfs.xfs with it.
X-Origin-Diff: phab/D623
GitOrigin-RevId: ebdf51ee76d9d5a7fd94725c66ef53783f787df7
diff --git a/build/toolchain/musl-host-gcc/sysroot_repository.bzl b/build/toolchain/musl-host-gcc/sysroot_repository.bzl
new file mode 100644
index 0000000..253abbf
--- /dev/null
+++ b/build/toolchain/musl-host-gcc/sysroot_repository.bzl
@@ -0,0 +1,42 @@
+# Copyright 2020 The Monogon Project Authors.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+A generic workspace rule that extracts some subpaths from a tarball.
+
+TODO(q3k): This should maybe be moved to //build/utils and called differently.
+"""
+
+def _musl_sysroot_rule_impl(rctx):
+ rctx.extract(rctx.attr.snapshot)
+ rctx.file("BUILD.bazel", """
+filegroup(
+ name = "all",
+ srcs = glob(["include/**", "lib/**"]),
+ visibility = ["//visibility:public"],
+)
+""")
+
+
+musl_sysroot_rule = repository_rule(
+ implementation = _musl_sysroot_rule_impl,
+ attrs = {
+ "snapshot": attr.label(
+ default = Label("//build/toolchain/musl-host-gcc:sysroot.tar.xz"),
+ allow_single_file = True,
+ ),
+ },
+)