1 files changed, 123 insertions, 0 deletions
diff --git a/build/codegen.go b/build/codegen.go
new file mode 100644
index 0000000000..eb2c37d651
--- /dev/null
+++ b/build/codegen.go
@@ -0,0 +1,123 @@
+// Copyright (C) 2016 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 art
+
+// This file implements the "codegen" property to apply different properties based on the currently
+// selected codegen arches, which defaults to all arches on the host and the primary and secondary
+// arches on the device.
+
+import (
+	"android/soong/android"
+	"sort"
+	"strings"
+)
+
+func (a *codegenCustomizer) CustomizeProperties(ctx android.CustomizePropertiesContext) {
+	c := &a.codegenProperties.Codegen
+
+	var hostArches, deviceArches []string
+
+	e := envDefault(ctx, "ART_HOST_CODEGEN_ARCHS", "")
+	if e == "" {
+		hostArches = supportedArches
+	} else {
+		hostArches = strings.Split(e, " ")
+	}
+
+	e = envDefault(ctx, "ART_TARGET_CODEGEN_ARCHS", "")
+	if e == "" {
+		deviceArches = defaultDeviceCodegenArches(ctx)
+	} else {
+		deviceArches = strings.Split(e, " ")
+	}
+
+	type props struct {
+		Target struct {
+			Android *codegenArchProperties
+			Host    *codegenArchProperties
+		}
+	}
+
+	addCodegenArchProperties := func(p *props, hod **codegenArchProperties, arch string) {
+		switch arch {
+		case "arm":
+			*hod = &c.Arm
+		case "arm64":
+			*hod = &c.Arm64
+		case "mips":
+			*hod = &c.Mips
+		case "mips64":
+			*hod = &c.Mips64
+		case "x86":
+			*hod = &c.X86
+		case "x86_64":
+			*hod = &c.X86_64
+		default:
+			ctx.ModuleErrorf("Unknown codegen architecture %q", arch)
+			return
+		}
+		ctx.AppendProperties(p)
+	}
+
+	for _, a := range deviceArches {
+		p := &props{}
+		addCodegenArchProperties(p, &p.Target.Android, a)
+		if ctx.Failed() {
+			return
+		}
+	}
+
+	for _, a := range hostArches {
+		p := &props{}
+		addCodegenArchProperties(p, &p.Target.Host, a)
+		if ctx.Failed() {
+			return
+		}
+	}
+}
+
+type codegenArchProperties struct {
+	Srcs   []string
+	Cflags []string
+	Static struct {
+		Whole_static_libs []string
+	}
+	Shared struct {
+		Shared_libs []string
+	}
+}
+
+type codegenProperties struct {
+	Codegen struct {
+		Arm, Arm64, Mips, Mips64, X86, X86_64 codegenArchProperties
+	}
+}
+
+type codegenCustomizer struct {
+	codegenProperties codegenProperties
+}
+
+func defaultDeviceCodegenArches(ctx android.CustomizePropertiesContext) []string {
+	arches := make(map[string]bool)
+	for _, a := range ctx.DeviceConfig().Arches() {
+		arches[a.ArchType.String()] = true
+	}
+	ret := make([]string, 0, len(arches))
+	for a := range arches {
+		ret = append(ret, a)
+	}
+	sort.Strings(ret)
+	return ret
+}