Move toolchain and global variables into separate package

Move all of the configuration into a cc/config package

Change-Id: If56fc7242062ed1ce3cb297f78a1e0ef7537373c
diff --git a/cc/config/x86_linux_host.go b/cc/config/x86_linux_host.go
new file mode 100644
index 0000000..676ea5c
--- /dev/null
+++ b/cc/config/x86_linux_host.go
@@ -0,0 +1,273 @@
+// Copyright 2016 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 (
+	"strings"
+
+	"android/soong/android"
+)
+
+var (
+	linuxCflags = []string{
+		"-fno-exceptions", // from build/core/combo/select.mk
+		"-Wno-multichar",  // from build/core/combo/select.mk
+
+		"-fdiagnostics-color",
+
+		"-Wa,--noexecstack",
+
+		"-fPIC",
+		"-no-canonical-prefixes",
+
+		"-U_FORTIFY_SOURCE",
+		"-D_FORTIFY_SOURCE=2",
+		"-fstack-protector",
+
+		// Workaround differences in inttypes.h between host and target.
+		//See bug 12708004.
+		"-D__STDC_FORMAT_MACROS",
+		"-D__STDC_CONSTANT_MACROS",
+
+		// HOST_RELEASE_CFLAGS
+		"-O2", // from build/core/combo/select.mk
+		"-g",  // from build/core/combo/select.mk
+		"-fno-strict-aliasing", // from build/core/combo/select.mk
+	}
+
+	linuxLdflags = []string{
+		"-Wl,-z,noexecstack",
+		"-Wl,-z,relro",
+		"-Wl,-z,now",
+		"-Wl,--no-undefined-version",
+	}
+
+	// Extended cflags
+	linuxX86Cflags = []string{
+		"-msse3",
+		"-mfpmath=sse",
+		"-m32",
+		"-march=prescott",
+		"-D_FILE_OFFSET_BITS=64",
+		"-D_LARGEFILE_SOURCE=1",
+	}
+
+	linuxX8664Cflags = []string{
+		"-m64",
+	}
+
+	linuxX86Ldflags = []string{
+		"-m32",
+	}
+
+	linuxX8664Ldflags = []string{
+		"-m64",
+	}
+
+	linuxClangCflags = append(ClangFilterUnknownCflags(linuxCflags), []string{
+		"--gcc-toolchain=${LinuxGccRoot}",
+		"--sysroot ${LinuxGccRoot}/sysroot",
+		"-fstack-protector-strong",
+	}...)
+
+	linuxClangLdflags = append(ClangFilterUnknownCflags(linuxLdflags), []string{
+		"--gcc-toolchain=${LinuxGccRoot}",
+		"--sysroot ${LinuxGccRoot}/sysroot",
+	}...)
+
+	linuxX86ClangLdflags = append(ClangFilterUnknownCflags(linuxX86Ldflags), []string{
+		"-B${LinuxGccRoot}/lib/gcc/${LinuxGccTriple}/${LinuxGccVersion}/32",
+		"-L${LinuxGccRoot}/lib/gcc/${LinuxGccTriple}/${LinuxGccVersion}/32",
+		"-L${LinuxGccRoot}/${LinuxGccTriple}/lib32",
+	}...)
+
+	linuxX8664ClangLdflags = append(ClangFilterUnknownCflags(linuxX8664Ldflags), []string{
+		"-B${LinuxGccRoot}/lib/gcc/${LinuxGccTriple}/${LinuxGccVersion}",
+		"-L${LinuxGccRoot}/lib/gcc/${LinuxGccTriple}/${LinuxGccVersion}",
+		"-L${LinuxGccRoot}/${LinuxGccTriple}/lib64",
+	}...)
+
+	linuxClangCppflags = []string{
+		"-isystem ${LinuxGccRoot}/${LinuxGccTriple}/include/c++/${LinuxGccVersion}",
+		"-isystem ${LinuxGccRoot}/${LinuxGccTriple}/include/c++/${LinuxGccVersion}/backward",
+	}
+
+	linuxX86ClangCppflags = []string{
+		"-isystem ${LinuxGccRoot}/${LinuxGccTriple}/include/c++/${LinuxGccVersion}/${LinuxGccTriple}/32",
+	}
+
+	linuxX8664ClangCppflags = []string{
+		"-isystem ${LinuxGccRoot}/${LinuxGccTriple}/include/c++/${LinuxGccVersion}/${LinuxGccTriple}",
+	}
+
+	linuxAvailableLibraries = addPrefix([]string{
+		"c",
+		"dl",
+		"gcc",
+		"gcc_s",
+		"m",
+		"ncurses",
+		"pthread",
+		"resolv",
+		"rt",
+		"util",
+		"z",
+	}, "-l")
+)
+
+const (
+	linuxGccVersion = "4.8"
+)
+
+func init() {
+	pctx.StaticVariable("LinuxGccVersion", linuxGccVersion)
+
+	pctx.SourcePathVariable("LinuxGccRoot",
+		"prebuilts/gcc/${HostPrebuiltTag}/host/x86_64-linux-glibc2.15-${LinuxGccVersion}")
+
+	pctx.StaticVariable("LinuxGccTriple", "x86_64-linux")
+
+	pctx.StaticVariable("LinuxCflags", strings.Join(linuxCflags, " "))
+	pctx.StaticVariable("LinuxLdflags", strings.Join(linuxLdflags, " "))
+
+	pctx.StaticVariable("LinuxClangCflags", strings.Join(linuxClangCflags, " "))
+	pctx.StaticVariable("LinuxClangLdflags", strings.Join(linuxClangLdflags, " "))
+	pctx.StaticVariable("LinuxClangCppflags", strings.Join(linuxClangCppflags, " "))
+
+	// Extended cflags
+	pctx.StaticVariable("LinuxX86Cflags", strings.Join(linuxX86Cflags, " "))
+	pctx.StaticVariable("LinuxX8664Cflags", strings.Join(linuxX8664Cflags, " "))
+	pctx.StaticVariable("LinuxX86Ldflags", strings.Join(linuxX86Ldflags, " "))
+	pctx.StaticVariable("LinuxX8664Ldflags", strings.Join(linuxX8664Ldflags, " "))
+
+	pctx.StaticVariable("LinuxX86ClangCflags",
+		strings.Join(ClangFilterUnknownCflags(linuxX86Cflags), " "))
+	pctx.StaticVariable("LinuxX8664ClangCflags",
+		strings.Join(ClangFilterUnknownCflags(linuxX8664Cflags), " "))
+	pctx.StaticVariable("LinuxX86ClangLdflags", strings.Join(linuxX86ClangLdflags, " "))
+	pctx.StaticVariable("LinuxX8664ClangLdflags", strings.Join(linuxX8664ClangLdflags, " "))
+	pctx.StaticVariable("LinuxX86ClangCppflags", strings.Join(linuxX86ClangCppflags, " "))
+	pctx.StaticVariable("LinuxX8664ClangCppflags", strings.Join(linuxX8664ClangCppflags, " "))
+}
+
+type toolchainLinux struct {
+	cFlags, ldFlags string
+}
+
+type toolchainLinuxX86 struct {
+	toolchain32Bit
+	toolchainLinux
+}
+
+type toolchainLinuxX8664 struct {
+	toolchain64Bit
+	toolchainLinux
+}
+
+func (t *toolchainLinuxX86) Name() string {
+	return "x86"
+}
+
+func (t *toolchainLinuxX8664) Name() string {
+	return "x86_64"
+}
+
+func (t *toolchainLinux) GccRoot() string {
+	return "${config.LinuxGccRoot}"
+}
+
+func (t *toolchainLinux) GccTriple() string {
+	return "${config.LinuxGccTriple}"
+}
+
+func (t *toolchainLinux) GccVersion() string {
+	return linuxGccVersion
+}
+
+func (t *toolchainLinuxX86) Cflags() string {
+	return "${config.LinuxCflags} ${config.LinuxX86Cflags}"
+}
+
+func (t *toolchainLinuxX8664) Cflags() string {
+	return "${config.LinuxCflags} ${config.LinuxX8664Cflags}"
+}
+
+func (t *toolchainLinux) Cppflags() string {
+	return ""
+}
+
+func (t *toolchainLinuxX86) Ldflags() string {
+	return "${config.LinuxLdflags} ${config.LinuxX86Ldflags}"
+}
+
+func (t *toolchainLinuxX8664) Ldflags() string {
+	return "${config.LinuxLdflags} ${config.LinuxX8664Ldflags}"
+}
+
+func (t *toolchainLinux) IncludeFlags() string {
+	return ""
+}
+
+func (t *toolchainLinuxX86) ClangTriple() string {
+	return "i686-linux-gnu"
+}
+
+func (t *toolchainLinuxX86) ClangCflags() string {
+	return "${config.LinuxClangCflags} ${config.LinuxX86ClangCflags}"
+}
+
+func (t *toolchainLinuxX86) ClangCppflags() string {
+	return "${config.LinuxClangCppflags} ${config.LinuxX86ClangCppflags}"
+}
+
+func (t *toolchainLinuxX8664) ClangTriple() string {
+	return "x86_64-linux-gnu"
+}
+
+func (t *toolchainLinuxX8664) ClangCflags() string {
+	return "${config.LinuxClangCflags} ${config.LinuxX8664ClangCflags}"
+}
+
+func (t *toolchainLinuxX8664) ClangCppflags() string {
+	return "${config.LinuxClangCppflags} ${config.LinuxX8664ClangCppflags}"
+}
+
+func (t *toolchainLinuxX86) ClangLdflags() string {
+	return "${config.LinuxClangLdflags} ${config.LinuxX86ClangLdflags}"
+}
+
+func (t *toolchainLinuxX8664) ClangLdflags() string {
+	return "${config.LinuxClangLdflags} ${config.LinuxX8664ClangLdflags}"
+}
+
+func (t *toolchainLinux) AvailableLibraries() []string {
+	return linuxAvailableLibraries
+}
+
+var toolchainLinuxX86Singleton Toolchain = &toolchainLinuxX86{}
+var toolchainLinuxX8664Singleton Toolchain = &toolchainLinuxX8664{}
+
+func linuxX86ToolchainFactory(arch android.Arch) Toolchain {
+	return toolchainLinuxX86Singleton
+}
+
+func linuxX8664ToolchainFactory(arch android.Arch) Toolchain {
+	return toolchainLinuxX8664Singleton
+}
+
+func init() {
+	registerToolchainFactory(android.Linux, android.X86, linuxX86ToolchainFactory)
+	registerToolchainFactory(android.Linux, android.X86_64, linuxX8664ToolchainFactory)
+}