diff --git a/cc/config/arm64_device.go b/cc/config/arm64_device.go
index cd81eab..cacd287 100644
--- a/cc/config/arm64_device.go
+++ b/cc/config/arm64_device.go
@@ -48,7 +48,7 @@
 
 	arm64Cppflags = []string{}
 
-	arm64CpuVariantCflags = map[string][]string{
+	arm64ClangCpuVariantCflags = map[string][]string{
 		"cortex-a53": []string{
 			"-mcpu=cortex-a53",
 		},
@@ -61,9 +61,7 @@
 			"-mcpu=cortex-a55",
 		},
 		"kryo": []string{
-			// Use the cortex-a57 cpu since some compilers
-			// don't support a Kryo specific target yet.
-			"-mcpu=cortex-a57",
+			"-mcpu=kryo",
 		},
 		"exynos-m1": []string{
 			"-mcpu=exynos-m1",
@@ -72,8 +70,6 @@
 			"-mcpu=exynos-m2",
 		},
 	}
-
-	arm64ClangCpuVariantCflags = copyVariantFlags(arm64CpuVariantCflags)
 )
 
 const (
@@ -94,18 +90,13 @@
 		"exynos-m2",
 		"denver64")
 
-	// Clang supports specific Kryo targeting
-	replaceFirst(arm64ClangCpuVariantCflags["kryo"], "-mcpu=cortex-a57", "-mcpu=kryo")
-
 	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("Arm64Lldflags", strings.Join(arm64Lldflags, " "))
-	pctx.StaticVariable("Arm64Cppflags", strings.Join(arm64Cppflags, " "))
 	pctx.StaticVariable("Arm64IncludeFlags", bionicHeaders("arm64"))
 
 	pctx.StaticVariable("Arm64ClangCflags", strings.Join(ClangFilterUnknownCflags(arm64Cflags), " "))
@@ -116,45 +107,23 @@
 	pctx.StaticVariable("Arm64ClangArmv8ACflags", strings.Join(arm64ArchVariantCflags["armv8-a"], " "))
 	pctx.StaticVariable("Arm64ClangArmv82ACflags", strings.Join(arm64ArchVariantCflags["armv8-2a"], " "))
 
-	pctx.StaticVariable("Arm64CortexA53Cflags",
-		strings.Join(arm64CpuVariantCflags["cortex-a53"], " "))
 	pctx.StaticVariable("Arm64ClangCortexA53Cflags",
 		strings.Join(arm64ClangCpuVariantCflags["cortex-a53"], " "))
 
-	pctx.StaticVariable("Arm64CortexA55Cflags",
-		strings.Join(arm64CpuVariantCflags["cortex-a55"], " "))
 	pctx.StaticVariable("Arm64ClangCortexA55Cflags",
 		strings.Join(arm64ClangCpuVariantCflags["cortex-a55"], " "))
 
-	pctx.StaticVariable("Arm64KryoCflags",
-		strings.Join(arm64CpuVariantCflags["kryo"], " "))
 	pctx.StaticVariable("Arm64ClangKryoCflags",
 		strings.Join(arm64ClangCpuVariantCflags["kryo"], " "))
 
-	pctx.StaticVariable("Arm64ExynosM1Cflags",
-		strings.Join(arm64CpuVariantCflags["cortex-a53"], " "))
 	pctx.StaticVariable("Arm64ClangExynosM1Cflags",
 		strings.Join(arm64ClangCpuVariantCflags["exynos-m1"], " "))
 
-	pctx.StaticVariable("Arm64ExynosM2Cflags",
-		strings.Join(arm64CpuVariantCflags["cortex-a53"], " "))
 	pctx.StaticVariable("Arm64ClangExynosM2Cflags",
 		strings.Join(arm64ClangCpuVariantCflags["exynos-m2"], " "))
 }
 
 var (
-	arm64CpuVariantCflagsVar = map[string]string{
-		"":           "",
-		"cortex-a53": "${config.Arm64CortexA53Cflags}",
-		"cortex-a55": "${config.Arm64CortexA55Cflags}",
-		"cortex-a72": "${config.Arm64CortexA53Cflags}",
-		"cortex-a73": "${config.Arm64CortexA53Cflags}",
-		"cortex-a75": "${config.Arm64CortexA55Cflags}",
-		"kryo":       "${config.Arm64KryoCflags}",
-		"exynos-m1":  "${config.Arm64ExynosM1Cflags}",
-		"exynos-m2":  "${config.Arm64ExynosM2Cflags}",
-	}
-
 	arm64ClangArchVariantCflagsVar = map[string]string{
 		"armv8-a":  "${config.Arm64ClangArmv8ACflags}",
 		"armv8-2a": "${config.Arm64ClangArmv82ACflags}",
@@ -178,7 +147,6 @@
 
 	ldflags              string
 	lldflags             string
-	toolchainCflags      string
 	toolchainClangCflags string
 }
 
@@ -198,22 +166,6 @@
 	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 t.ldflags
-}
-
 func (t *toolchainArm64) IncludeFlags() string {
 	return "${config.Arm64IncludeFlags}"
 }
@@ -277,7 +229,6 @@
 			"${config.Arm64Lldflags}",
 			extraLdflags,
 		}, " "),
-		toolchainCflags:      variantOrDefault(arm64CpuVariantCflagsVar, arch.CpuVariant),
 		toolchainClangCflags: strings.Join(toolchainClangCflags, " "),
 	}
 }
diff --git a/cc/config/arm_device.go b/cc/config/arm_device.go
index 8dee2c8..95c9495 100644
--- a/cc/config/arm_device.go
+++ b/cc/config/arm_device.go
@@ -50,7 +50,7 @@
 		"-Os",
 	}
 
-	armArchVariantCflags = map[string][]string{
+	armClangArchVariantCflags = map[string][]string{
 		"armv7-a": []string{
 			"-march=armv7-a",
 			"-mfloat-abi=softfp",
@@ -68,7 +68,7 @@
 		},
 	}
 
-	armCpuVariantCflags = map[string][]string{
+	armClangCpuVariantCflags = map[string][]string{
 		"cortex-a7": []string{
 			"-mcpu=cortex-a7",
 			"-mfpu=neon-vfpv4",
@@ -118,7 +118,7 @@
 			"-D__ARM_FEATURE_LPAE=1",
 		},
 		"krait": []string{
-			"-mcpu=cortex-a15",
+			"-mcpu=krait",
 			"-mfpu=neon-vfpv4",
 			// Fake an ARM compiler flag as these processors support LPAE which GCC/clang
 			// don't advertise.
@@ -138,9 +138,6 @@
 			"-D__ARM_FEATURE_LPAE=1",
 		},
 	}
-
-	armClangCpuVariantCflags  = copyVariantFlags(armCpuVariantCflags)
-	armClangArchVariantCflags = copyVariantFlags(armArchVariantCflags)
 )
 
 const (
@@ -174,49 +171,15 @@
 	android.RegisterArchVariantFeatures(android.Arm, "armv7-a-neon", "neon")
 	android.RegisterArchVariantFeatures(android.Arm, "armv8-a", "neon")
 
-	// Krait is not supported by GCC, but is supported by Clang, so
-	// override the definitions when building modules with Clang.
-	replaceFirst(armClangCpuVariantCflags["krait"], "-mcpu=cortex-a15", "-mcpu=krait")
-
-	// The reason we use "-march=armv8-a+crc", instead of "-march=armv8-a", for
-	// gcc is the latter would conflict with any specified/supported -mcpu!
-	// All armv8-a cores supported by gcc 4.9 support crc, so it's safe
-	// to add +crc. Besides, the use of gcc is only for legacy code.
-	replaceFirst(armArchVariantCflags["armv8-a"], "-march=armv8-a", "-march=armv8-a+crc")
-
 	pctx.StaticVariable("armGccVersion", armGccVersion)
 
 	pctx.SourcePathVariable("ArmGccRoot",
 		"prebuilts/gcc/${HostPrebuiltTag}/arm/arm-linux-androideabi-${armGccVersion}")
 
-	pctx.StaticVariable("ArmToolchainCflags", strings.Join(armToolchainCflags, " "))
-	pctx.StaticVariable("ArmCflags", strings.Join(armCflags, " "))
 	pctx.StaticVariable("ArmLdflags", strings.Join(armLdflags, " "))
 	pctx.StaticVariable("ArmLldflags", strings.Join(armLldflags, " "))
-	pctx.StaticVariable("ArmCppflags", strings.Join(armCppflags, " "))
 	pctx.StaticVariable("ArmIncludeFlags", bionicHeaders("arm"))
 
-	// Extended cflags
-
-	// ARM vs. Thumb instruction set flags
-	pctx.StaticVariable("ArmArmCflags", strings.Join(armArmCflags, " "))
-	pctx.StaticVariable("ArmThumbCflags", strings.Join(armThumbCflags, " "))
-
-	// Architecture variant cflags
-	pctx.StaticVariable("ArmArmv7ACflags", strings.Join(armArchVariantCflags["armv7-a"], " "))
-	pctx.StaticVariable("ArmArmv7ANeonCflags", strings.Join(armArchVariantCflags["armv7-a-neon"], " "))
-	pctx.StaticVariable("ArmArmv8ACflags", strings.Join(armArchVariantCflags["armv8-a"], " "))
-
-	// Cpu variant cflags
-	pctx.StaticVariable("ArmGenericCflags", strings.Join(armCpuVariantCflags[""], " "))
-	pctx.StaticVariable("ArmCortexA7Cflags", strings.Join(armCpuVariantCflags["cortex-a7"], " "))
-	pctx.StaticVariable("ArmCortexA8Cflags", strings.Join(armCpuVariantCflags["cortex-a8"], " "))
-	pctx.StaticVariable("ArmCortexA15Cflags", strings.Join(armCpuVariantCflags["cortex-a15"], " "))
-	pctx.StaticVariable("ArmCortexA53Cflags", strings.Join(armCpuVariantCflags["cortex-a53"], " "))
-	pctx.StaticVariable("ArmCortexA55Cflags", strings.Join(armCpuVariantCflags["cortex-a55"], " "))
-	pctx.StaticVariable("ArmKraitCflags", strings.Join(armCpuVariantCflags["krait"], " "))
-	pctx.StaticVariable("ArmKryoCflags", strings.Join(armCpuVariantCflags["kryo"], " "))
-
 	// Clang cflags
 	pctx.StaticVariable("ArmToolchainClangCflags", strings.Join(ClangFilterUnknownCflags(armToolchainCflags), " "))
 	pctx.StaticVariable("ArmClangCflags", strings.Join(ClangFilterUnknownCflags(armCflags), " "))
@@ -256,30 +219,6 @@
 }
 
 var (
-	armArchVariantCflagsVar = map[string]string{
-		"armv7-a":      "${config.ArmArmv7ACflags}",
-		"armv7-a-neon": "${config.ArmArmv7ANeonCflags}",
-		"armv8-a":      "${config.ArmArmv8ACflags}",
-	}
-
-	armCpuVariantCflagsVar = map[string]string{
-		"":               "${config.ArmGenericCflags}",
-		"cortex-a7":      "${config.ArmCortexA7Cflags}",
-		"cortex-a8":      "${config.ArmCortexA8Cflags}",
-		"cortex-a15":     "${config.ArmCortexA15Cflags}",
-		"cortex-a53":     "${config.ArmCortexA53Cflags}",
-		"cortex-a53.a57": "${config.ArmCortexA53Cflags}",
-		"cortex-a55":     "${config.ArmCortexA55Cflags}",
-		"cortex-a72":     "${config.ArmCortexA53Cflags}",
-		"cortex-a73":     "${config.ArmCortexA53Cflags}",
-		"cortex-a75":     "${config.ArmCortexA55Cflags}",
-		"krait":          "${config.ArmKraitCflags}",
-		"kryo":           "${config.ArmKryoCflags}",
-		"exynos-m1":      "${config.ArmCortexA53Cflags}",
-		"exynos-m2":      "${config.ArmCortexA53Cflags}",
-		"denver":         "${config.ArmCortexA15Cflags}",
-	}
-
 	armClangArchVariantCflagsVar = map[string]string{
 		"armv7-a":      "${config.ArmClangArmv7ACflags}",
 		"armv7-a-neon": "${config.ArmClangArmv7ANeonCflags}",
@@ -307,9 +246,9 @@
 
 type toolchainArm struct {
 	toolchain32Bit
-	ldflags                               string
-	lldflags                              string
-	toolchainCflags, toolchainClangCflags string
+	ldflags              string
+	lldflags             string
+	toolchainClangCflags string
 }
 
 func (t *toolchainArm) Name() string {
@@ -328,22 +267,6 @@
 	return armGccVersion
 }
 
-func (t *toolchainArm) ToolchainCflags() string {
-	return t.toolchainCflags
-}
-
-func (t *toolchainArm) Cflags() string {
-	return "${config.ArmCflags}"
-}
-
-func (t *toolchainArm) Cppflags() string {
-	return "${config.ArmCppflags}"
-}
-
-func (t *toolchainArm) Ldflags() string {
-	return t.ldflags
-}
-
 func (t *toolchainArm) IncludeFlags() string {
 	return "${config.ArmIncludeFlags}"
 }
@@ -395,16 +318,11 @@
 
 func armToolchainFactory(arch android.Arch) Toolchain {
 	var fixCortexA8 string
-	toolchainCflags := make([]string, 2, 3)
 	toolchainClangCflags := make([]string, 2, 3)
 
-	toolchainCflags[0] = "${config.ArmToolchainCflags}"
-	toolchainCflags[1] = armArchVariantCflagsVar[arch.ArchVariant]
 	toolchainClangCflags[0] = "${config.ArmToolchainClangCflags}"
 	toolchainClangCflags[1] = armClangArchVariantCflagsVar[arch.ArchVariant]
 
-	toolchainCflags = append(toolchainCflags,
-		variantOrDefault(armCpuVariantCflagsVar, arch.CpuVariant))
 	toolchainClangCflags = append(toolchainClangCflags,
 		variantOrDefault(armClangCpuVariantCflagsVar, arch.CpuVariant))
 
@@ -426,7 +344,6 @@
 	}
 
 	return &toolchainArm{
-		toolchainCflags: strings.Join(toolchainCflags, " "),
 		ldflags: strings.Join([]string{
 			"${config.ArmLdflags}",
 			fixCortexA8,
diff --git a/cc/config/global.go b/cc/config/global.go
index 8a3d545..29dca9f 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -15,7 +15,6 @@
 package config
 
 import (
-	"fmt"
 	"runtime"
 	"strings"
 
@@ -250,10 +249,3 @@
 		"-isystem bionic/libc/kernel/android/uapi",
 	}, " ")
 }
-
-func replaceFirst(slice []string, from, to string) {
-	if slice[0] != from {
-		panic(fmt.Errorf("Expected %q, found %q", from, to))
-	}
-	slice[0] = to
-}
diff --git a/cc/config/mips64_device.go b/cc/config/mips64_device.go
index 0c4640b..561d8d6 100644
--- a/cc/config/mips64_device.go
+++ b/cc/config/mips64_device.go
@@ -69,9 +69,6 @@
 	pctx.SourcePathVariable("Mips64GccRoot",
 		"prebuilts/gcc/${HostPrebuiltTag}/mips/mips64el-linux-android-${mips64GccVersion}")
 
-	pctx.StaticVariable("Mips64Cflags", strings.Join(mips64Cflags, " "))
-	pctx.StaticVariable("Mips64Ldflags", strings.Join(mips64Ldflags, " "))
-	pctx.StaticVariable("Mips64Cppflags", strings.Join(mips64Cppflags, " "))
 	pctx.StaticVariable("Mips64IncludeFlags", bionicHeaders("mips"))
 
 	// Clang cflags
@@ -83,7 +80,6 @@
 
 	// Architecture variant cflags
 	for variant, cflags := range mips64ArchVariantCflags {
-		pctx.StaticVariable("Mips64"+variant+"VariantCflags", strings.Join(cflags, " "))
 		pctx.StaticVariable("Mips64"+variant+"VariantClangCflags",
 			strings.Join(ClangFilterUnknownCflags(cflags), " "))
 	}
@@ -91,8 +87,8 @@
 
 type toolchainMips64 struct {
 	toolchain64Bit
-	cflags, clangCflags                   string
-	toolchainCflags, toolchainClangCflags string
+	clangCflags          string
+	toolchainClangCflags string
 }
 
 func (t *toolchainMips64) Name() string {
@@ -111,22 +107,6 @@
 	return mips64GccVersion
 }
 
-func (t *toolchainMips64) ToolchainCflags() string {
-	return t.toolchainCflags
-}
-
-func (t *toolchainMips64) Cflags() string {
-	return t.cflags
-}
-
-func (t *toolchainMips64) Cppflags() string {
-	return "${config.Mips64Cppflags}"
-}
-
-func (t *toolchainMips64) Ldflags() string {
-	return "${config.Mips64Ldflags}"
-}
-
 func (t *toolchainMips64) IncludeFlags() string {
 	return "${config.Mips64IncludeFlags}"
 }
@@ -166,9 +146,7 @@
 
 func mips64ToolchainFactory(arch android.Arch) Toolchain {
 	return &toolchainMips64{
-		cflags:               "${config.Mips64Cflags}",
 		clangCflags:          "${config.Mips64ClangCflags}",
-		toolchainCflags:      "${config.Mips64" + arch.ArchVariant + "VariantCflags}",
 		toolchainClangCflags: "${config.Mips64" + arch.ArchVariant + "VariantClangCflags}",
 	}
 }
diff --git a/cc/config/mips_device.go b/cc/config/mips_device.go
index eb44fd5..8cd35b3 100644
--- a/cc/config/mips_device.go
+++ b/cc/config/mips_device.go
@@ -111,9 +111,6 @@
 		"prebuilts/gcc/${HostPrebuiltTag}/mips/mips64el-linux-android-${mipsGccVersion}")
 
 	pctx.StaticVariable("MipsToolchainLdflags", strings.Join(mipsToolchainLdflags, " "))
-	pctx.StaticVariable("MipsCflags", strings.Join(mipsCflags, " "))
-	pctx.StaticVariable("MipsLdflags", strings.Join(mipsLdflags, " "))
-	pctx.StaticVariable("MipsCppflags", strings.Join(mipsCppflags, " "))
 	pctx.StaticVariable("MipsIncludeFlags", bionicHeaders("mips"))
 
 	// Clang cflags
@@ -125,7 +122,6 @@
 
 	// Architecture variant cflags
 	for variant, cflags := range mipsArchVariantCflags {
-		pctx.StaticVariable("Mips"+variant+"VariantCflags", strings.Join(cflags, " "))
 		pctx.StaticVariable("Mips"+variant+"VariantClangCflags",
 			strings.Join(ClangFilterUnknownCflags(cflags), " "))
 	}
@@ -133,8 +129,8 @@
 
 type toolchainMips struct {
 	toolchain32Bit
-	cflags, clangCflags                   string
-	toolchainCflags, toolchainClangCflags string
+	clangCflags          string
+	toolchainClangCflags string
 }
 
 func (t *toolchainMips) Name() string {
@@ -153,26 +149,6 @@
 	return mipsGccVersion
 }
 
-func (t *toolchainMips) ToolchainLdflags() string {
-	return "${config.MipsToolchainLdflags}"
-}
-
-func (t *toolchainMips) ToolchainCflags() string {
-	return t.toolchainCflags
-}
-
-func (t *toolchainMips) Cflags() string {
-	return t.cflags
-}
-
-func (t *toolchainMips) Cppflags() string {
-	return "${config.MipsCppflags}"
-}
-
-func (t *toolchainMips) Ldflags() string {
-	return "${config.MipsLdflags}"
-}
-
 func (t *toolchainMips) IncludeFlags() string {
 	return "${config.MipsIncludeFlags}"
 }
@@ -216,9 +192,7 @@
 
 func mipsToolchainFactory(arch android.Arch) Toolchain {
 	return &toolchainMips{
-		cflags:               "${config.MipsCflags}",
 		clangCflags:          "${config.MipsClangCflags}",
-		toolchainCflags:      "${config.Mips" + arch.ArchVariant + "VariantCflags}",
 		toolchainClangCflags: "${config.Mips" + arch.ArchVariant + "VariantClangCflags}",
 	}
 }
diff --git a/cc/config/toolchain.go b/cc/config/toolchain.go
index 0b9f4ed..997bca6 100644
--- a/cc/config/toolchain.go
+++ b/cc/config/toolchain.go
@@ -162,18 +162,6 @@
 	return false
 }
 
-func copyVariantFlags(m map[string][]string) map[string][]string {
-	ret := make(map[string][]string, len(m))
-	for k, v := range m {
-		l := make([]string, len(m[k]))
-		for i := range m[k] {
-			l[i] = v[i]
-		}
-		ret[k] = l
-	}
-	return ret
-}
-
 func variantOrDefault(variants map[string]string, choice string) string {
 	if ret, ok := variants[choice]; ok {
 		return ret
diff --git a/cc/config/x86_64_device.go b/cc/config/x86_64_device.go
index 5e2dc49..ff8a6da 100644
--- a/cc/config/x86_64_device.go
+++ b/cc/config/x86_64_device.go
@@ -125,10 +125,8 @@
 	pctx.StaticVariable("X86_64ToolchainCflags", "-m64")
 	pctx.StaticVariable("X86_64ToolchainLdflags", "-m64")
 
-	pctx.StaticVariable("X86_64Cflags", strings.Join(x86_64Cflags, " "))
 	pctx.StaticVariable("X86_64Ldflags", strings.Join(x86_64Ldflags, " "))
 	pctx.StaticVariable("X86_64Lldflags", strings.Join(x86_64Lldflags, " "))
-	pctx.StaticVariable("X86_64Cppflags", strings.Join(x86_64Cppflags, " "))
 	pctx.StaticVariable("X86_64IncludeFlags", bionicHeaders("x86"))
 
 	// Clang cflags
@@ -144,7 +142,6 @@
 
 	// Architecture variant cflags
 	for variant, cflags := range x86_64ArchVariantCflags {
-		pctx.StaticVariable("X86_64"+variant+"VariantCflags", strings.Join(cflags, " "))
 		pctx.StaticVariable("X86_64"+variant+"VariantClangCflags",
 			strings.Join(ClangFilterUnknownCflags(cflags), " "))
 	}
@@ -152,7 +149,7 @@
 
 type toolchainX86_64 struct {
 	toolchain64Bit
-	toolchainCflags, toolchainClangCflags string
+	toolchainClangCflags string
 }
 
 func (t *toolchainX86_64) Name() string {
@@ -171,26 +168,6 @@
 	return x86_64GccVersion
 }
 
-func (t *toolchainX86_64) ToolchainLdflags() string {
-	return "${config.X86_64ToolchainLdflags}"
-}
-
-func (t *toolchainX86_64) ToolchainCflags() string {
-	return t.toolchainCflags
-}
-
-func (t *toolchainX86_64) Cflags() string {
-	return "${config.X86_64Cflags}"
-}
-
-func (t *toolchainX86_64) Cppflags() string {
-	return "${config.X86_64Cppflags}"
-}
-
-func (t *toolchainX86_64) Ldflags() string {
-	return "${config.X86_64Ldflags}"
-}
-
 func (t *toolchainX86_64) IncludeFlags() string {
 	return "${config.X86_64IncludeFlags}"
 }
@@ -232,23 +209,16 @@
 }
 
 func x86_64ToolchainFactory(arch android.Arch) Toolchain {
-	toolchainCflags := []string{
-		"${config.X86_64ToolchainCflags}",
-		"${config.X86_64" + arch.ArchVariant + "VariantCflags}",
-	}
-
 	toolchainClangCflags := []string{
 		"${config.X86_64ToolchainCflags}",
 		"${config.X86_64" + arch.ArchVariant + "VariantClangCflags}",
 	}
 
 	for _, feature := range arch.ArchFeatures {
-		toolchainCflags = append(toolchainCflags, x86_64ArchFeatureCflags[feature]...)
 		toolchainClangCflags = append(toolchainClangCflags, x86_64ArchFeatureCflags[feature]...)
 	}
 
 	return &toolchainX86_64{
-		toolchainCflags:      strings.Join(toolchainCflags, " "),
 		toolchainClangCflags: strings.Join(toolchainClangCflags, " "),
 	}
 }
diff --git a/cc/config/x86_darwin_host.go b/cc/config/x86_darwin_host.go
index 694137d..09632db 100644
--- a/cc/config/x86_darwin_host.go
+++ b/cc/config/x86_darwin_host.go
@@ -117,9 +117,6 @@
 
 	pctx.StaticVariable("DarwinGccTriple", "i686-apple-darwin11")
 
-	pctx.StaticVariable("DarwinCflags", strings.Join(darwinCflags, " "))
-	pctx.StaticVariable("DarwinLdflags", strings.Join(darwinLdflags, " "))
-
 	pctx.StaticVariable("DarwinClangCflags", strings.Join(darwinClangCflags, " "))
 	pctx.StaticVariable("DarwinClangLdflags", strings.Join(darwinClangLdflags, " "))
 	pctx.StaticVariable("DarwinClangLldflags", strings.Join(darwinClangLldflags, " "))
@@ -182,18 +179,6 @@
 	return darwinGccVersion
 }
 
-func (t *toolchainDarwin) Cflags() string {
-	return "${config.DarwinCflags}"
-}
-
-func (t *toolchainDarwin) Cppflags() string {
-	return ""
-}
-
-func (t *toolchainDarwin) Ldflags() string {
-	return "${config.DarwinLdflags}"
-}
-
 func (t *toolchainDarwin) IncludeFlags() string {
 	return ""
 }
diff --git a/cc/config/x86_device.go b/cc/config/x86_device.go
index ffdf8ea..fc0b1d8 100644
--- a/cc/config/x86_device.go
+++ b/cc/config/x86_device.go
@@ -149,10 +149,8 @@
 	pctx.StaticVariable("X86ToolchainCflags", "-m32")
 	pctx.StaticVariable("X86ToolchainLdflags", "-m32")
 
-	pctx.StaticVariable("X86Cflags", strings.Join(x86Cflags, " "))
 	pctx.StaticVariable("X86Ldflags", strings.Join(x86Ldflags, " "))
 	pctx.StaticVariable("X86Lldflags", strings.Join(x86Lldflags, " "))
-	pctx.StaticVariable("X86Cppflags", strings.Join(x86Cppflags, " "))
 	pctx.StaticVariable("X86IncludeFlags", bionicHeaders("x86"))
 
 	// Clang cflags
@@ -168,7 +166,6 @@
 
 	// Architecture variant cflags
 	for variant, cflags := range x86ArchVariantCflags {
-		pctx.StaticVariable("X86"+variant+"VariantCflags", strings.Join(cflags, " "))
 		pctx.StaticVariable("X86"+variant+"VariantClangCflags",
 			strings.Join(ClangFilterUnknownCflags(cflags), " "))
 	}
@@ -176,7 +173,7 @@
 
 type toolchainX86 struct {
 	toolchain32Bit
-	toolchainCflags, toolchainClangCflags string
+	toolchainClangCflags string
 }
 
 func (t *toolchainX86) Name() string {
@@ -195,26 +192,6 @@
 	return x86GccVersion
 }
 
-func (t *toolchainX86) ToolchainLdflags() string {
-	return "${config.X86ToolchainLdflags}"
-}
-
-func (t *toolchainX86) ToolchainCflags() string {
-	return t.toolchainCflags
-}
-
-func (t *toolchainX86) Cflags() string {
-	return "${config.X86Cflags}"
-}
-
-func (t *toolchainX86) Cppflags() string {
-	return "${config.X86Cppflags}"
-}
-
-func (t *toolchainX86) Ldflags() string {
-	return "${config.X86Ldflags}"
-}
-
 func (t *toolchainX86) IncludeFlags() string {
 	return "${config.X86IncludeFlags}"
 }
@@ -256,23 +233,16 @@
 }
 
 func x86ToolchainFactory(arch android.Arch) Toolchain {
-	toolchainCflags := []string{
-		"${config.X86ToolchainCflags}",
-		"${config.X86" + arch.ArchVariant + "VariantCflags}",
-	}
-
 	toolchainClangCflags := []string{
 		"${config.X86ToolchainCflags}",
 		"${config.X86" + arch.ArchVariant + "VariantClangCflags}",
 	}
 
 	for _, feature := range arch.ArchFeatures {
-		toolchainCflags = append(toolchainCflags, x86ArchFeatureCflags[feature]...)
 		toolchainClangCflags = append(toolchainClangCflags, x86ArchFeatureCflags[feature]...)
 	}
 
 	return &toolchainX86{
-		toolchainCflags:      strings.Join(toolchainCflags, " "),
 		toolchainClangCflags: strings.Join(toolchainClangCflags, " "),
 	}
 }
diff --git a/cc/config/x86_linux_bionic_host.go b/cc/config/x86_linux_bionic_host.go
index a9fb1f6..8a12523 100644
--- a/cc/config/x86_linux_bionic_host.go
+++ b/cc/config/x86_linux_bionic_host.go
@@ -96,18 +96,6 @@
 	return "4.9"
 }
 
-func (t *toolchainLinuxBionic) Cflags() string {
-	return ""
-}
-
-func (t *toolchainLinuxBionic) Cppflags() string {
-	return ""
-}
-
-func (t *toolchainLinuxBionic) Ldflags() string {
-	return ""
-}
-
 func (t *toolchainLinuxBionic) IncludeFlags() string {
 	return "${config.LinuxBionicIncludeFlags}"
 }
diff --git a/cc/config/x86_linux_host.go b/cc/config/x86_linux_host.go
index 3965cd7..8da21b3 100644
--- a/cc/config/x86_linux_host.go
+++ b/cc/config/x86_linux_host.go
@@ -122,19 +122,10 @@
 
 	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("LinuxClangLldflags", strings.Join(linuxClangLldflags, " "))
 
-	// 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",
@@ -182,26 +173,6 @@
 	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 ""
 }
diff --git a/cc/config/x86_windows_host.go b/cc/config/x86_windows_host.go
index 9573174..988ba03 100644
--- a/cc/config/x86_windows_host.go
+++ b/cc/config/x86_windows_host.go
@@ -137,19 +137,11 @@
 
 	pctx.StaticVariable("WindowsGccTriple", "x86_64-w64-mingw32")
 
-	pctx.StaticVariable("WindowsCflags", strings.Join(windowsCflags, " "))
-	pctx.StaticVariable("WindowsLdflags", strings.Join(windowsLdflags, " "))
-
 	pctx.StaticVariable("WindowsClangCflags", strings.Join(windowsClangCflags, " "))
 	pctx.StaticVariable("WindowsClangLdflags", strings.Join(windowsClangLdflags, " "))
 	pctx.StaticVariable("WindowsClangLldflags", strings.Join(windowsClangLldflags, " "))
 	pctx.StaticVariable("WindowsClangCppflags", strings.Join(windowsClangCppflags, " "))
 
-	pctx.StaticVariable("WindowsX86Cflags", strings.Join(windowsX86Cflags, " "))
-	pctx.StaticVariable("WindowsX8664Cflags", strings.Join(windowsX8664Cflags, " "))
-	pctx.StaticVariable("WindowsX86Ldflags", strings.Join(windowsX86Ldflags, " "))
-	pctx.StaticVariable("WindowsX8664Ldflags", strings.Join(windowsX8664Ldflags, " "))
-
 	pctx.StaticVariable("WindowsX86ClangCflags",
 		strings.Join(ClangFilterUnknownCflags(windowsX86Cflags), " "))
 	pctx.StaticVariable("WindowsX8664ClangCflags",
@@ -198,26 +190,6 @@
 	return windowsGccVersion
 }
 
-func (t *toolchainWindowsX86) Cflags() string {
-	return "${config.WindowsCflags} ${config.WindowsX86Cflags}"
-}
-
-func (t *toolchainWindowsX8664) Cflags() string {
-	return "${config.WindowsCflags} ${config.WindowsX8664Cflags}"
-}
-
-func (t *toolchainWindows) Cppflags() string {
-	return ""
-}
-
-func (t *toolchainWindowsX86) Ldflags() string {
-	return "${config.WindowsLdflags} ${config.WindowsX86Ldflags}"
-}
-
-func (t *toolchainWindowsX8664) Ldflags() string {
-	return "${config.WindowsLdflags} ${config.WindowsX8664Ldflags}"
-}
-
 func (t *toolchainWindows) IncludeFlags() string {
 	return "${config.WindowsIncludeFlags}"
 }