Add Rust support to Soong.
Adds support to Soong for building rust modules. This currently only
supports x86_64 device and x86 linux host targets. The functionality
is sufficient to build crosvm.
Bug: 136189233
Test: Test module builds.
Test: crosvm builds.
Change-Id: I6ea04615834a6d673578ab10ea1a2eb04259fe09
diff --git a/rust/config/x86_64_device.go b/rust/config/x86_64_device.go
new file mode 100644
index 0000000..2aca56a
--- /dev/null
+++ b/rust/config/x86_64_device.go
@@ -0,0 +1,88 @@
+// Copyright 2019 The Android Open Source Project
+//
+// 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.
+
+package config
+
+import (
+ "strings"
+
+ "android/soong/android"
+)
+
+var (
+ x86_64RustFlags = []string{}
+ x86_64ArchFeatureRustFlags = map[string][]string{}
+ x86_64LinkFlags = []string{}
+
+ x86_64ArchVariantRustFlags = map[string][]string{
+ "": []string{},
+ "broadwell": []string{"-C target-cpu=broadwell"},
+ "haswell": []string{"-C target-cpu=haswell"},
+ "ivybridge": []string{"-C target-cpu=ivybridge"},
+ "sandybridge": []string{"-C target-cpu=sandybridge"},
+ "silvermont": []string{"-C target-cpu=silvermont"},
+ "skylake": []string{"-C target-cpu=skylake"},
+ //TODO: Add target-cpu=stoneyridge when rustc supports it.
+ "stoneyridge": []string{""},
+ }
+)
+
+func init() {
+ registerToolchainFactory(android.Android, android.X86_64, x86_64ToolchainFactory)
+
+ pctx.StaticVariable("x86_64ToolchainRustFlags", strings.Join(x86_64RustFlags, " "))
+ pctx.StaticVariable("x86_64ToolchainLinkFlags", strings.Join(x86_64LinkFlags, " "))
+
+ for variant, rustFlags := range x86_64ArchVariantRustFlags {
+ pctx.StaticVariable("X86_64"+variant+"VariantRustFlags",
+ strings.Join(rustFlags, " "))
+ }
+
+}
+
+type toolchainX86_64 struct {
+ toolchain64Bit
+ toolchainRustFlags string
+}
+
+func (t *toolchainX86_64) RustTriple() string {
+ return "x86_64-unknown-linux-gnu"
+}
+
+func (t *toolchainX86_64) ToolchainLinkFlags() string {
+ return "${config.x86_64ToolchainLinkFlags}"
+}
+
+func (t *toolchainX86_64) ToolchainRustFlags() string {
+ return t.toolchainRustFlags
+}
+
+func (t *toolchainX86_64) RustFlags() string {
+ return "${config.x86_64ToolchainRustFlags}"
+}
+
+func x86_64ToolchainFactory(arch android.Arch) Toolchain {
+ toolchainRustFlags := []string{
+ "${config.x86_64ToolchainRustFlags}",
+ "${config.X86_64" + arch.ArchVariant + "VariantRustFlags}",
+ }
+
+ for _, feature := range arch.ArchFeatures {
+ toolchainRustFlags = append(toolchainRustFlags, x86_64ArchFeatureRustFlags[feature]...)
+ }
+
+ return &toolchainX86_64{
+ toolchainRustFlags: strings.Join(toolchainRustFlags, " "),
+ }
+}