diff --git a/core/binary.mk b/core/binary.mk
index 1ef55b3a6b..614b8aa8f8 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -517,8 +517,8 @@ normal_objects_mode := $(if $(LOCAL_ARM_MODE),$(LOCAL_ARM_MODE),thumb)
 arm_objects_cflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)$(arm_objects_mode)_CFLAGS)
 normal_objects_cflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)$(normal_objects_mode)_CFLAGS)
 ifeq ($(my_clang),true)
-arm_objects_cflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(arm_objects_cflags))
-normal_objects_cflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(normal_objects_cflags))
+arm_objects_cflags := $(call convert-to-clang-flags,$(arm_objects_cflags))
+normal_objects_cflags := $(call convert-to-clang-flags,$(normal_objects_cflags))
 endif
 
 else
@@ -1344,10 +1344,10 @@ my_conlyflags += $(LOCAL_CLANG_CONLYFLAGS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PRE
 my_cppflags += $(LOCAL_CLANG_CPPFLAGS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CLANG_CPPFLAGS_$(my_32_64_bit_suffix))
 my_ldflags += $(LOCAL_CLANG_LDFLAGS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CLANG_LDFLAGS_$(my_32_64_bit_suffix))
 my_asflags += $(LOCAL_CLANG_ASFLAGS_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) $(LOCAL_CLANG_ASFLAGS_$(my_32_64_bit_suffix))
-my_cflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(my_cflags))
-my_cppflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(my_cppflags))
-my_asflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(my_asflags))
-my_ldflags := $(call $(LOCAL_2ND_ARCH_VAR_PREFIX)convert-to-$(my_host)clang-flags,$(my_ldflags))
+my_cflags := $(call convert-to-clang-flags,$(my_cflags))
+my_cppflags := $(call convert-to-clang-flags,$(my_cppflags))
+my_asflags := $(call convert-to-clang-flags,$(my_asflags))
+my_ldflags := $(call convert-to-clang-flags,$(my_ldflags))
 else
 # gcc does not handle hidden functions in a manner compatible with LLVM libcxx
 # see b/27908145
diff --git a/core/clang/HOST_x86.mk b/core/clang/HOST_x86.mk
index c89fca85ff..b6e12058ff 100644
--- a/core/clang/HOST_x86.mk
+++ b/core/clang/HOST_x86.mk
@@ -50,11 +50,4 @@ CLANG_CONFIG_x86_HOST_EXTRA_LDFLAGS := \
   $(CLANG_CONFIG_x86_HOST_COMBO_EXTRA_LDFLAGS) \
   -target $(CLANG_CONFIG_x86_HOST_TRIPLE)
 
-define $(clang_2nd_arch_prefix)convert-to-host-clang-flags
-  $(strip \
-  $(call subst-clang-incompatible-x86-flags,\
-  $(filter-out $(CLANG_CONFIG_x86_UNKNOWN_CFLAGS),\
-  $(1))))
-endef
-
 $(clang_2nd_arch_prefix)HOST_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-i686.a
diff --git a/core/clang/HOST_x86_64.mk b/core/clang/HOST_x86_64.mk
index ce452a3e26..e4f72f8dfa 100644
--- a/core/clang/HOST_x86_64.mk
+++ b/core/clang/HOST_x86_64.mk
@@ -50,11 +50,4 @@ CLANG_CONFIG_x86_64_HOST_EXTRA_LDFLAGS := \
   $(CLANG_CONFIG_x86_64_HOST_COMBO_EXTRA_LDFLAGS) \
   -target $(CLANG_CONFIG_x86_64_HOST_TRIPLE)
 
-define convert-to-host-clang-flags
-  $(strip \
-  $(call subst-clang-incompatible-x86_64-flags,\
-  $(filter-out $(CLANG_CONFIG_x86_64_UNKNOWN_CFLAGS),\
-  $(1))))
-endef
-
 HOST_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-x86_64.a
diff --git a/core/clang/TARGET_arm.mk b/core/clang/TARGET_arm.mk
index 9ff19b4f84..a0de716a30 100644
--- a/core/clang/TARGET_arm.mk
+++ b/core/clang/TARGET_arm.mk
@@ -37,13 +37,6 @@ CLANG_CONFIG_arm_TARGET_EXTRA_LDFLAGS := \
   -B$(CLANG_CONFIG_arm_TARGET_TOOLCHAIN_PREFIX)
 
 
-define $(clang_2nd_arch_prefix)convert-to-clang-flags
-  $(strip \
-  $(call subst-clang-incompatible-arm-flags,\
-  $(filter-out $(CLANG_CONFIG_arm_UNKNOWN_CFLAGS),\
-  $(1))))
-endef
-
 $(clang_2nd_arch_prefix)RS_TRIPLE := armv7-linux-androideabi
 $(clang_2nd_arch_prefix)RS_TRIPLE_CFLAGS :=
 $(clang_2nd_arch_prefix)RS_COMPAT_TRIPLE := armv7-none-linux-gnueabi
diff --git a/core/clang/TARGET_arm64.mk b/core/clang/TARGET_arm64.mk
index 77390d08bf..cb62c6105b 100644
--- a/core/clang/TARGET_arm64.mk
+++ b/core/clang/TARGET_arm64.mk
@@ -36,13 +36,6 @@ CLANG_CONFIG_arm64_TARGET_EXTRA_LDFLAGS := \
   -B$(CLANG_CONFIG_arm64_TARGET_TOOLCHAIN_PREFIX)
 
 
-define convert-to-clang-flags
-  $(strip \
-  $(call subst-clang-incompatible-arm64-flags,\
-  $(filter-out $(CLANG_CONFIG_arm64_UNKNOWN_CFLAGS),\
-  $(1))))
-endef
-
 RS_TRIPLE := aarch64-linux-android
 RS_TRIPLE_CFLAGS :=
 RS_COMPAT_TRIPLE := aarch64-linux-android
diff --git a/core/clang/TARGET_mips.mk b/core/clang/TARGET_mips.mk
index 46a9966f7d..9e0a4173a5 100644
--- a/core/clang/TARGET_mips.mk
+++ b/core/clang/TARGET_mips.mk
@@ -37,13 +37,6 @@ CLANG_CONFIG_mips_TARGET_EXTRA_LDFLAGS := \
   -B$(CLANG_CONFIG_mips_TARGET_TOOLCHAIN_PREFIX)
 
 
-define $(clang_2nd_arch_prefix)convert-to-clang-flags
-  $(strip \
-  $(call subst-clang-incompatible-mips-flags,\
-  $(filter-out $(CLANG_CONFIG_mips_UNKNOWN_CFLAGS),\
-  $(1))))
-endef
-
 $(clang_2nd_arch_prefix)RS_TRIPLE := armv7-linux-androideabi
 $(clang_2nd_arch_prefix)RS_TRIPLE_CFLAGS :=
 RS_COMPAT_TRIPLE := mipsel-linux-android
diff --git a/core/clang/TARGET_mips64.mk b/core/clang/TARGET_mips64.mk
index 9f86a4805f..20eae5a55a 100644
--- a/core/clang/TARGET_mips64.mk
+++ b/core/clang/TARGET_mips64.mk
@@ -36,13 +36,6 @@ CLANG_CONFIG_mips64_TARGET_EXTRA_LDFLAGS := \
   -B$(CLANG_CONFIG_mips64_TARGET_TOOLCHAIN_PREFIX)
 
 
-define convert-to-clang-flags
-  $(strip \
-  $(call subst-clang-incompatible-mips64-flags,\
-  $(filter-out $(CLANG_CONFIG_mips64_UNKNOWN_CFLAGS),\
-  $(1))))
-endef
-
 RS_TRIPLE := aarch64-linux-android
 RS_TRIPLE_CFLAGS :=
 RS_COMPAT_TRIPLE := mips64el-linux-android
diff --git a/core/clang/TARGET_x86.mk b/core/clang/TARGET_x86.mk
index 51cf1c5017..d319a01de5 100644
--- a/core/clang/TARGET_x86.mk
+++ b/core/clang/TARGET_x86.mk
@@ -43,13 +43,6 @@ CLANG_CONFIG_x86_TARGET_EXTRA_LDFLAGS := \
   -B$(CLANG_CONFIG_x86_TARGET_TOOLCHAIN_PREFIX)
 
 
-define $(clang_2nd_arch_prefix)convert-to-clang-flags
-  $(strip \
-  $(call subst-clang-incompatible-x86-flags,\
-  $(filter-out $(CLANG_CONFIG_x86_UNKNOWN_CFLAGS),\
-  $(1))))
-endef
-
 $(clang_2nd_arch_prefix)RS_TRIPLE := armv7-linux-androideabi
 $(clang_2nd_arch_prefix)RS_TRIPLE_CFLAGS := -D__i386__
 $(clang_2nd_arch_prefix)RS_COMPAT_TRIPLE := i686-linux-android
diff --git a/core/clang/TARGET_x86_64.mk b/core/clang/TARGET_x86_64.mk
index 08649592d9..e57aaf843b 100644
--- a/core/clang/TARGET_x86_64.mk
+++ b/core/clang/TARGET_x86_64.mk
@@ -36,13 +36,6 @@ CLANG_CONFIG_x86_64_TARGET_EXTRA_LDFLAGS := \
   -B$(CLANG_CONFIG_x86_64_TARGET_TOOLCHAIN_PREFIX)
 
 
-define convert-to-clang-flags
-  $(strip \
-  $(call subst-clang-incompatible-x86_64-flags,\
-  $(filter-out $(CLANG_CONFIG_x86_64_UNKNOWN_CFLAGS),\
-  $(1))))
-endef
-
 RS_TRIPLE := aarch64-linux-android
 RS_TRIPLE_CFLAGS := -D__x86_64__
 RS_COMPAT_TRIPLE := x86_64-linux-android
diff --git a/core/clang/arm.mk b/core/clang/arm.mk
index a5472f4b3f..f8f9632c43 100644
--- a/core/clang/arm.mk
+++ b/core/clang/arm.mk
@@ -8,34 +8,8 @@ CLANG_CONFIG_arm_EXTRA_CPPFLAGS :=
 
 CLANG_CONFIG_arm_EXTRA_LDFLAGS :=
 
-# Include common unknown flags
-CLANG_CONFIG_arm_UNKNOWN_CFLAGS := \
-  $(CLANG_CONFIG_UNKNOWN_CFLAGS) \
-  -mthumb-interwork \
-  -fgcse-after-reload \
-  -frerun-cse-after-loop \
-  -frename-registers \
-  -fno-align-jumps \
-  -fno-builtin-sin \
-  -fno-caller-saves \
-  -fno-early-inlining \
-  -fno-move-loop-invariants \
-  -fno-partial-inlining \
-  -fno-strict-volatile-bitfields \
-  -fno-tree-copy-prop \
-  -fno-tree-loop-optimize
-
 ifneq (,$(filter krait,$(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)))
   # Android's clang support's krait as a CPU whereas GCC doesn't. Specify
   # -mcpu here rather than the more normal core/combo/arch/arm/armv7-a-neon.mk.
   CLANG_CONFIG_arm_EXTRA_CFLAGS += -mcpu=krait -mfpu=neon-vfpv4
-
-  # This isn't really unknown, but allows us to only set -mcpu=krait
-  CLANG_CONFIG_arm_UNKNOWN_CFLAGS += -mcpu=cortex-a15
 endif
-
-define subst-clang-incompatible-arm-flags
-  $(subst -march=armv5te,-march=armv5t,\
-  $(subst -march=armv5e,-march=armv5,\
-  $(1)))
-endef
diff --git a/core/clang/arm64.mk b/core/clang/arm64.mk
index cad7321ec1..94b17f59e8 100644
--- a/core/clang/arm64.mk
+++ b/core/clang/arm64.mk
@@ -5,17 +5,3 @@ CLANG_CONFIG_arm64_EXTRA_ASFLAGS :=
 CLANG_CONFIG_arm64_EXTRA_CFLAGS :=
 
 CLANG_CONFIG_arm64_EXTRA_LDFLAGS :=
-
-# Include common unknown flags
-CLANG_CONFIG_arm64_UNKNOWN_CFLAGS := \
-  $(CLANG_CONFIG_UNKNOWN_CFLAGS) \
-  -fgcse-after-reload \
-  -frerun-cse-after-loop \
-  -frename-registers \
-  -fno-strict-volatile-bitfields \
-  -fno-align-jumps
-
-# We don't have any arm64 flags to substitute yet.
-define subst-clang-incompatible-arm64-flags
-  $(1)
-endef
diff --git a/core/clang/config.mk b/core/clang/config.mk
index c7499ab2aa..ccfd0f2fee 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -85,6 +85,30 @@ CLANG_CONFIG_UNKNOWN_CFLAGS := \
   -Wunused-but-set-parameter \
   -Wunused-but-set-variable \
   -fdiagnostics-color \
+  -mthumb-interwork \
+  -fgcse-after-reload \
+  -frerun-cse-after-loop \
+  -frename-registers \
+  -fno-align-jumps \
+  -fno-builtin-sin \
+  -fno-caller-saves \
+  -fno-early-inlining \
+  -fno-move-loop-invariants \
+  -fno-partial-inlining \
+  -fno-strict-volatile-bitfields \
+  -fno-tree-copy-prop \
+  -fno-tree-loop-optimize \
+  -msynci \
+  -mno-synci \
+  -mno-fused-madd \
+  -finline-limit=300 \
+  -fno-inline-functions-called-once \
+  -mfpmath=sse \
+  -mbionic
+
+define convert-to-clang-flags
+$(strip $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(1)))
+endef
 
 # Clang flags for all host rules
 CLANG_CONFIG_HOST_EXTRA_ASFLAGS :=
diff --git a/core/clang/mips.mk b/core/clang/mips.mk
index aeb2f6a37c..f5238c903a 100644
--- a/core/clang/mips.mk
+++ b/core/clang/mips.mk
@@ -3,19 +3,3 @@
 CLANG_CONFIG_mips_EXTRA_ASFLAGS :=
 CLANG_CONFIG_mips_EXTRA_CFLAGS :=
 CLANG_CONFIG_mips_EXTRA_LDFLAGS :=
-
-# Include common unknown flags
-CLANG_CONFIG_mips_UNKNOWN_CFLAGS := \
-  $(CLANG_CONFIG_UNKNOWN_CFLAGS) \
-  -fno-strict-volatile-bitfields \
-  -fgcse-after-reload \
-  -frerun-cse-after-loop \
-  -frename-registers \
-  -msynci \
-  -mno-synci \
-  -mno-fused-madd
-
-# We don't have any mips flags to substitute yet.
-define subst-clang-incompatible-mips-flags
-  $(1)
-endef
diff --git a/core/clang/mips64.mk b/core/clang/mips64.mk
index 20e87bd9ed..4c410d3378 100644
--- a/core/clang/mips64.mk
+++ b/core/clang/mips64.mk
@@ -3,19 +3,3 @@
 CLANG_CONFIG_mips64_EXTRA_ASFLAGS :=
 CLANG_CONFIG_mips64_EXTRA_CFLAGS :=
 CLANG_CONFIG_mips64_EXTRA_LDFLAGS :=
-
-# Include common unknown flags
-CLANG_CONFIG_mips64_UNKNOWN_CFLAGS := \
-  $(CLANG_CONFIG_UNKNOWN_CFLAGS) \
-  -fno-strict-volatile-bitfields \
-  -fgcse-after-reload \
-  -frerun-cse-after-loop \
-  -frename-registers \
-  -msynci \
-  -mno-synci \
-  -mno-fused-madd
-
-# We don't have any mips64 flags to substitute yet.
-define subst-clang-incompatible-mips64-flags
-  $(1)
-endef
diff --git a/core/clang/x86.mk b/core/clang/x86.mk
index 69c3fb2af8..f588209e85 100644
--- a/core/clang/x86.mk
+++ b/core/clang/x86.mk
@@ -4,16 +4,3 @@ CLANG_CONFIG_x86_EXTRA_ASFLAGS := \
   -msse3
 CLANG_CONFIG_x86_EXTRA_CFLAGS :=
 CLANG_CONFIG_x86_EXTRA_LDFLAGS :=
-
-# Include common unknown flags
-CLANG_CONFIG_x86_UNKNOWN_CFLAGS := \
-  $(CLANG_CONFIG_UNKNOWN_CFLAGS) \
-  -finline-limit=300 \
-  -fno-inline-functions-called-once \
-  -mfpmath=sse \
-  -mbionic
-
-# We don't have any x86 flags to substitute yet.
-define subst-clang-incompatible-x86-flags
-  $(1)
-endef
diff --git a/core/clang/x86_64.mk b/core/clang/x86_64.mk
index cba10d47b7..c8f1f6ebe6 100644
--- a/core/clang/x86_64.mk
+++ b/core/clang/x86_64.mk
@@ -3,16 +3,3 @@
 CLANG_CONFIG_x86_64_EXTRA_ASFLAGS :=
 CLANG_CONFIG_x86_64_EXTRA_CFLAGS :=
 CLANG_CONFIG_x86_64_EXTRA_LDFLAGS :=
-
-# Include common unknown flags
-CLANG_CONFIG_x86_64_UNKNOWN_CFLAGS := \
-  $(CLANG_CONFIG_UNKNOWN_CFLAGS) \
-  -finline-limit=300 \
-  -fno-inline-functions-called-once \
-  -mfpmath=sse \
-  -mbionic
-
-# We don't have any x86_64 flags to substitute yet.
-define subst-clang-incompatible-x86_64-flags
-  $(1)
-endef