Move toolchain and global variables into separate package

Move all of the configuration into a cc/config package

Change-Id: If56fc7242062ed1ce3cb297f78a1e0ef7537373c

cc/config/arm64_device.go

@@ -0,0 +1,204 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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 (
+	"fmt"
+	"strings"
+
+	"android/soong/android"
+)
+
+var (
+	arm64Cflags = []string{
+		"-fno-exceptions", // from build/core/combo/select.mk
+		"-Wno-multichar",  // from build/core/combo/select.mk
+		"-fno-strict-aliasing",
+		"-fstack-protector-strong",
+		"-ffunction-sections",
+		"-fdata-sections",
+		"-funwind-tables",
+		"-Wa,--noexecstack",
+		"-Werror=format-security",
+		"-D_FORTIFY_SOURCE=2",
+		"-fno-short-enums",
+		"-no-canonical-prefixes",
+		"-fno-canonical-system-headers",
+
+		// Help catch common 32/64-bit errors.
+		"-Werror=pointer-to-int-cast",
+		"-Werror=int-to-pointer-cast",
+		"-Werror=implicit-function-declaration",
+
+		"-fno-strict-volatile-bitfields",
+
+		// TARGET_RELEASE_CFLAGS
+		"-DNDEBUG",
+		"-O2 -g",
+		"-Wstrict-aliasing=2",
+		"-fgcse-after-reload",
+		"-frerun-cse-after-loop",
+		"-frename-registers",
+	}
+
+	arm64Ldflags = []string{
+		"-Wl,-z,noexecstack",
+		"-Wl,-z,relro",
+		"-Wl,-z,now",
+		"-Wl,--build-id=md5",
+		"-Wl,--warn-shared-textrel",
+		"-Wl,--fatal-warnings",
+		"-Wl,-maarch64linux",
+		"-Wl,--hash-style=gnu",
+		"-Wl,--fix-cortex-a53-843419",
+		"-fuse-ld=gold",
+		"-Wl,--icf=safe",
+		"-Wl,--no-undefined-version",
+
+		// Disable transitive dependency library symbol resolving.
+		"-Wl,--allow-shlib-undefined",
+	}
+
+	arm64Cppflags = []string{
+		"-fvisibility-inlines-hidden",
+	}
+
+	arm64CpuVariantCflags = map[string][]string{
+		"cortex-a53": []string{
+			"-mcpu=cortex-a53",
+		},
+	}
+
+	arm64ClangCpuVariantCflags = copyVariantFlags(arm64CpuVariantCflags)
+)
+
+const (
+	arm64GccVersion = "4.9"
+)
+
+func init() {
+	pctx.StaticVariable("arm64GccVersion", arm64GccVersion)
+
+	pctx.SourcePathVariable("Arm64GccRoot",
+		"prebuilts/gcc/${HostPrebuiltTag}/aarch64/aarch64-linux-android-${arm64GccVersion}")
+
+	pctx.StaticVariable("Arm64Cflags", strings.Join(arm64Cflags, " "))
+	pctx.StaticVariable("Arm64Ldflags", strings.Join(arm64Ldflags, " "))
+	pctx.StaticVariable("Arm64Cppflags", strings.Join(arm64Cppflags, " "))
+	pctx.StaticVariable("Arm64IncludeFlags", bionicHeaders("arm64", "arm64"))
+
+	pctx.StaticVariable("Arm64ClangCflags", strings.Join(ClangFilterUnknownCflags(arm64Cflags), " "))
+	pctx.StaticVariable("Arm64ClangLdflags", strings.Join(ClangFilterUnknownCflags(arm64Ldflags), " "))
+	pctx.StaticVariable("Arm64ClangCppflags", strings.Join(ClangFilterUnknownCflags(arm64Cppflags), " "))
+
+	pctx.StaticVariable("Arm64CortexA53Cflags",
+		strings.Join(arm64CpuVariantCflags["cortex-a53"], " "))
+	pctx.StaticVariable("Arm64ClangCortexA53Cflags",
+		strings.Join(arm64ClangCpuVariantCflags["cortex-a53"], " "))
+}
+
+var (
+	arm64CpuVariantCflagsVar = map[string]string{
+		"":           "",
+		"cortex-a53": "${config.Arm64CortexA53Cflags}",
+	}
+
+	arm64ClangCpuVariantCflagsVar = map[string]string{
+		"":           "",
+		"cortex-a53": "${config.Arm64ClangCortexA53Cflags}",
+	}
+)
+
+type toolchainArm64 struct {
+	toolchain64Bit
+
+	toolchainCflags      string
+	toolchainClangCflags string
+}
+
+func (t *toolchainArm64) Name() string {
+	return "arm64"
+}
+
+func (t *toolchainArm64) GccRoot() string {
+	return "${config.Arm64GccRoot}"
+}
+
+func (t *toolchainArm64) GccTriple() string {
+	return "aarch64-linux-android"
+}
+
+func (t *toolchainArm64) GccVersion() string {
+	return arm64GccVersion
+}
+
+func (t *toolchainArm64) ToolchainCflags() string {
+	return t.toolchainCflags
+}
+
+func (t *toolchainArm64) Cflags() string {
+	return "${config.Arm64Cflags}"
+}
+
+func (t *toolchainArm64) Cppflags() string {
+	return "${config.Arm64Cppflags}"
+}
+
+func (t *toolchainArm64) Ldflags() string {
+	return "${config.Arm64Ldflags}"
+}
+
+func (t *toolchainArm64) IncludeFlags() string {
+	return "${config.Arm64IncludeFlags}"
+}
+
+func (t *toolchainArm64) ClangTriple() string {
+	return t.GccTriple()
+}
+
+func (t *toolchainArm64) ClangCflags() string {
+	return "${config.Arm64ClangCflags}"
+}
+
+func (t *toolchainArm64) ClangCppflags() string {
+	return "${config.Arm64ClangCppflags}"
+}
+
+func (t *toolchainArm64) ClangLdflags() string {
+	return "${config.Arm64Ldflags}"
+}
+
+func (t *toolchainArm64) ToolchainClangCflags() string {
+	return t.toolchainClangCflags
+}
+
+func (toolchainArm64) AddressSanitizerRuntimeLibrary() string {
+	return "libclang_rt.asan-aarch64-android.so"
+}
+
+func arm64ToolchainFactory(arch android.Arch) Toolchain {
+	if arch.ArchVariant != "armv8-a" {
+		panic(fmt.Sprintf("Unknown ARM architecture version: %q", arch.ArchVariant))
+	}
+
+	return &toolchainArm64{
+		toolchainCflags:      variantOrDefault(arm64CpuVariantCflagsVar, arch.CpuVariant),
+		toolchainClangCflags: variantOrDefault(arm64ClangCpuVariantCflagsVar, arch.CpuVariant),
+	}
+}
+
+func init() {
+	registerToolchainFactory(android.Android, android.Arm64, arm64ToolchainFactory)
+}