diff --git a/cc/config/arm64_device.go b/cc/config/arm64_device.go
index 390936a..e8b4797 100644
--- a/cc/config/arm64_device.go
+++ b/cc/config/arm64_device.go
@@ -23,9 +23,6 @@
 
 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",
@@ -34,19 +31,14 @@
 		"-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",
diff --git a/cc/config/arm_device.go b/cc/config/arm_device.go
index 7110ccb..8e890ff 100644
--- a/cc/config/arm_device.go
+++ b/cc/config/arm_device.go
@@ -28,8 +28,6 @@
 	}
 
 	armCflags = []string{
-		"-fno-exceptions", // from build/core/combo/select.mk
-		"-Wno-multichar",  // from build/core/combo/select.mk
 		"-ffunction-sections",
 		"-fdata-sections",
 		"-funwind-tables",
@@ -38,15 +36,12 @@
 		"-Werror=format-security",
 		"-D_FORTIFY_SOURCE=2",
 		"-fno-short-enums",
-		"-no-canonical-prefixes",
 		"-fno-canonical-system-headers",
 
 		"-fno-builtin-sin",
 		"-fno-strict-volatile-bitfields",
 
 		// TARGET_RELEASE_CFLAGS
-		"-DNDEBUG",
-		"-g",
 		"-Wstrict-aliasing=2",
 		"-fgcse-after-reload",
 		"-frerun-cse-after-loop",
@@ -71,7 +66,6 @@
 	}
 
 	armArmCflags = []string{
-		"-O2",
 		"-fomit-frame-pointer",
 		"-fstrict-aliasing",
 		"-funswitch-loops",
@@ -81,7 +75,6 @@
 		"-mthumb",
 		"-Os",
 		"-fomit-frame-pointer",
-		"-fno-strict-aliasing",
 	}
 
 	armArchVariantCflags = map[string][]string{
diff --git a/cc/config/global.go b/cc/config/global.go
index dae218c..5587eae 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -34,9 +34,19 @@
 		"-Winit-self",
 		"-Wpointer-arith",
 
-		// COMMON_RELEASE_CFLAGS
+		// Make paths in deps files relative
+		"-no-canonical-prefixes",
+
 		"-DNDEBUG",
 		"-UDEBUG",
+
+		"-fno-exceptions",
+		"-Wno-multichar",
+
+		"-O2",
+		"-g",
+
+		"-fno-strict-aliasing",
 	}
 
 	commonGlobalConlyflags = []string{}
diff --git a/cc/config/mips64_device.go b/cc/config/mips64_device.go
index e05dbf1..7da693f 100644
--- a/cc/config/mips64_device.go
+++ b/cc/config/mips64_device.go
@@ -22,11 +22,7 @@
 
 var (
 	mips64Cflags = []string{
-		"-fno-exceptions", // from build/core/combo/select.mk
-		"-Wno-multichar",  // from build/core/combo/select.mk
-		"-O2",
 		"-fomit-frame-pointer",
-		"-fno-strict-aliasing",
 		"-funswitch-loops",
 		"-Umips",
 		"-ffunction-sections",
@@ -36,17 +32,12 @@
 		"-Wa,--noexecstack",
 		"-Werror=format-security",
 		"-D_FORTIFY_SOURCE=2",
-		"-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",
 
 		// TARGET_RELEASE_CFLAGS
-		"-DNDEBUG",
-		"-g",
 		"-Wstrict-aliasing=2",
 		"-fgcse-after-reload",
 		"-frerun-cse-after-loop",
diff --git a/cc/config/mips_device.go b/cc/config/mips_device.go
index 78e95b6..f8470bf 100644
--- a/cc/config/mips_device.go
+++ b/cc/config/mips_device.go
@@ -22,11 +22,7 @@
 
 var (
 	mipsCflags = []string{
-		"-fno-exceptions", // from build/core/combo/select.mk
-		"-Wno-multichar",  // from build/core/combo/select.mk
-		"-O2",
 		"-fomit-frame-pointer",
-		"-fno-strict-aliasing",
 		"-funswitch-loops",
 		"-Umips",
 		"-ffunction-sections",
@@ -36,12 +32,9 @@
 		"-Wa,--noexecstack",
 		"-Werror=format-security",
 		"-D_FORTIFY_SOURCE=2",
-		"-no-canonical-prefixes",
 		"-fno-canonical-system-headers",
 
 		// TARGET_RELEASE_CFLAGS
-		"-DNDEBUG",
-		"-g",
 		"-Wstrict-aliasing=2",
 		"-fgcse-after-reload",
 		"-frerun-cse-after-loop",
diff --git a/cc/config/x86_64_device.go b/cc/config/x86_64_device.go
index a98001e..8d7a404 100644
--- a/cc/config/x86_64_device.go
+++ b/cc/config/x86_64_device.go
@@ -22,9 +22,6 @@
 
 var (
 	x86_64Cflags = []string{
-		"-fno-exceptions", // from build/core/combo/select.mk
-		"-Wno-multichar",  // from build/core/combo/select.mk
-		"-O2",
 		"-Wa,--noexecstack",
 		"-Werror=format-security",
 		"-D_FORTIFY_SOURCE=2",
@@ -33,22 +30,13 @@
 		"-finline-functions",
 		"-finline-limit=300",
 		"-fno-short-enums",
-		"-fstrict-aliasing",
 		"-funswitch-loops",
 		"-funwind-tables",
 		"-fstack-protector-strong",
-		"-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",
-
-		// TARGET_RELEASE_CFLAGS from build/core/combo/select.mk
-		"-O2",
-		"-g",
-		"-fno-strict-aliasing",
 	}
 
 	x86_64Cppflags = []string{}
diff --git a/cc/config/x86_darwin_host.go b/cc/config/x86_darwin_host.go
index 6d361b5..8d805c9 100644
--- a/cc/config/x86_darwin_host.go
+++ b/cc/config/x86_darwin_host.go
@@ -25,9 +25,6 @@
 
 var (
 	darwinCflags = []string{
-		"-fno-exceptions", // from build/core/combo/select.mk
-		"-Wno-multichar",  // from build/core/combo/select.mk
-
 		"-fdiagnostics-color",
 
 		"-fPIC",
@@ -38,10 +35,6 @@
 		"-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
 		"-isysroot ${macSdkRoot}",
 		"-mmacosx-version-min=${macMinVersion}",
 		"-DMACOSX_DEPLOYMENT_TARGET=${macMinVersion}",
diff --git a/cc/config/x86_device.go b/cc/config/x86_device.go
index 53d2265..59f8de7 100644
--- a/cc/config/x86_device.go
+++ b/cc/config/x86_device.go
@@ -22,9 +22,6 @@
 
 var (
 	x86Cflags = []string{
-		"-fno-exceptions", // from build/core/combo/select.mk
-		"-Wno-multichar",  // from build/core/combo/select.mk
-		"-O2",
 		"-Wa,--noexecstack",
 		"-Werror=format-security",
 		"-D_FORTIFY_SOURCE=2",
@@ -33,17 +30,10 @@
 		"-finline-functions",
 		"-finline-limit=300",
 		"-fno-short-enums",
-		"-fstrict-aliasing",
 		"-funswitch-loops",
 		"-funwind-tables",
 		"-fstack-protector-strong",
-		"-no-canonical-prefixes",
 		"-fno-canonical-system-headers",
-
-		// TARGET_RELEASE_CFLAGS from build/core/combo/select.mk
-		"-O2",
-		"-g",
-		"-fno-strict-aliasing",
 	}
 
 	x86ClangCflags = append(x86Cflags, []string{
diff --git a/cc/config/x86_linux_bionic_host.go b/cc/config/x86_linux_bionic_host.go
index 277361b..645ac26 100644
--- a/cc/config/x86_linux_bionic_host.go
+++ b/cc/config/x86_linux_bionic_host.go
@@ -22,15 +22,11 @@
 
 var (
 	linuxBionicCflags = ClangFilterUnknownCflags([]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",
@@ -43,14 +39,8 @@
 		"-fno-short-enums",
 		"-funswitch-loops",
 		"-funwind-tables",
-		"-no-canonical-prefixes",
 		"-fno-canonical-system-headers",
 
-		// 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
-
 		// Tell clang where the gcc toolchain is
 		"--gcc-toolchain=${LinuxBionicGccRoot}",
 
diff --git a/cc/config/x86_linux_host.go b/cc/config/x86_linux_host.go
index 88bd514..4f05068 100644
--- a/cc/config/x86_linux_host.go
+++ b/cc/config/x86_linux_host.go
@@ -22,15 +22,11 @@
 
 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",
@@ -40,11 +36,6 @@
 		//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{
diff --git a/cc/config/x86_windows_host.go b/cc/config/x86_windows_host.go
index 270084e..c9bafe6 100644
--- a/cc/config/x86_windows_host.go
+++ b/cc/config/x86_windows_host.go
@@ -22,9 +22,6 @@
 
 var (
 	windowsCflags = []string{
-		"-fno-exceptions", // from build/core/combo/select.mk
-		"-Wno-multichar",  // from build/core/combo/select.mk
-
 		"-DUSE_MINGW",
 		"-DWIN32_LEAN_AND_MEAN",
 		"-Wno-unused-parameter",
@@ -43,11 +40,6 @@
 		"-D_FILE_OFFSET_BITS=64",
 
 		"--sysroot ${WindowsGccRoot}/${WindowsGccTriple}",
-
-		// 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
 	}
 
 	windowsIncludeFlags = []string{