diff --git a/adb/Android.mk b/adb/Android.mk
index e17240b..be04cfa 100644
--- a/adb/Android.mk
+++ b/adb/Android.mk
@@ -18,11 +18,9 @@
     -DADB_REVISION='"$(adb_version)"' \
 
 ADB_COMMON_linux_CFLAGS := \
-    -std=c++14 \
     -Wexit-time-destructors \
 
 ADB_COMMON_darwin_CFLAGS := \
-    -std=c++14 \
     -Wexit-time-destructors \
 
 # Define windows.h and tchar.h Unicode preprocessor symbols so that
diff --git a/debuggerd/Android.mk b/debuggerd/Android.mk
index fdedb76..1fc850f 100644
--- a/debuggerd/Android.mk
+++ b/debuggerd/Android.mk
@@ -1,7 +1,6 @@
 LOCAL_PATH := $(call my-dir)
 
 common_cppflags := \
-    -std=gnu++11 \
     -W \
     -Wall \
     -Wextra \
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index d69a81f..286de5b 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -37,7 +37,6 @@
 LOCAL_MODULE := fastboot
 LOCAL_MODULE_TAGS := debug
 LOCAL_MODULE_HOST_OS := darwin linux windows
-LOCAL_CONLYFLAGS += -std=gnu99
 LOCAL_CFLAGS += -Wall -Wextra -Werror -Wunreachable-code
 
 LOCAL_CFLAGS += -DFASTBOOT_REVISION='"$(fastboot_version)"'
diff --git a/libbacktrace/Android.bp b/libbacktrace/Android.bp
index 93d997b..85b5597 100644
--- a/libbacktrace/Android.bp
+++ b/libbacktrace/Android.bp
@@ -21,8 +21,6 @@
         "-Wall",
         "-Werror",
     ],
-    conlyflags: ["-std=gnu99"],
-    cppflags: ["-std=gnu++11"],
 
     clang_cflags: ["-Wno-inline-asm"],
 
diff --git a/libbacktrace/Android.mk b/libbacktrace/Android.mk
index 56a3970..bb17325 100644
--- a/libbacktrace/Android.mk
+++ b/libbacktrace/Android.mk
@@ -20,12 +20,6 @@
 	-Wall \
 	-Werror \
 
-libbacktrace_common_conlyflags := \
-	-std=gnu99 \
-
-libbacktrace_common_cppflags := \
-	-std=gnu++11 \
-
 libbacktrace_common_c_includes := \
 	external/libunwind/include/tdep \
 
diff --git a/libcrypto_utils/Android.bp b/libcrypto_utils/Android.bp
index ca7bd31..f2560e6 100644
--- a/libcrypto_utils/Android.bp
+++ b/libcrypto_utils/Android.bp
@@ -24,7 +24,6 @@
         "-Wall",
         "-Wextra",
         "-Werror",
-        "-std=c99",
     ],
     local_include_dirs: ["include"],
     export_include_dirs: ["include"],
diff --git a/libcrypto_utils/tests/Android.mk b/libcrypto_utils/tests/Android.mk
index bdaef71..ef3d0cf 100644
--- a/libcrypto_utils/tests/Android.mk
+++ b/libcrypto_utils/tests/Android.mk
@@ -19,6 +19,6 @@
 include $(CLEAR_VARS)
 LOCAL_MODULE := libcrypto_utils_test
 LOCAL_SRC_FILES := android_pubkey_test.cpp
-LOCAL_CFLAGS := -Wall -Werror -Wextra -std=c++11
+LOCAL_CFLAGS := -Wall -Werror -Wextra
 LOCAL_SHARED_LIBRARIES := libcrypto_utils libcrypto
 include $(BUILD_HOST_NATIVE_TEST)
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index 955c0ec..94275bd 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -89,10 +89,6 @@
 
             static_libs: ["libdebuggerd_client"],
             export_static_lib_headers: ["libdebuggerd_client"],
-
-            cflags: [
-                "-std=gnu90",
-            ],
         },
 
         android_arm: {
diff --git a/liblog/tests/Android.mk b/liblog/tests/Android.mk
index a755b98..158987a 100644
--- a/liblog/tests/Android.mk
+++ b/liblog/tests/Android.mk
@@ -28,7 +28,6 @@
     -Wall -Wextra \
     -Werror \
     -fno-builtin \
-    -std=gnu++11
 
 benchmark_src_files := \
     benchmark_main.cpp \
@@ -54,7 +53,6 @@
     -Wall -Wextra \
     -Werror \
     -fno-builtin \
-    -std=gnu++11
 
 test_src_files := \
     liblog_test.cpp
diff --git a/libmemunreachable/Android.bp b/libmemunreachable/Android.bp
index 85bc421..4662368 100644
--- a/libmemunreachable/Android.bp
+++ b/libmemunreachable/Android.bp
@@ -2,7 +2,6 @@
     name: "libmemunreachable_defaults",
 
     cflags: [
-        "-std=c++14",
         "-Wall",
         "-Wextra",
         "-Werror",
diff --git a/libnativebridge/Android.bp b/libnativebridge/Android.bp
index 598dfcd..5fb56f2 100644
--- a/libnativebridge/Android.bp
+++ b/libnativebridge/Android.bp
@@ -12,7 +12,6 @@
         "-Wall",
     ],
     cppflags: [
-        "-std=gnu++11",
         "-fvisibility=protected",
     ],
 
diff --git a/libnativebridge/tests/Android.mk b/libnativebridge/tests/Android.mk
index 7265939..5ad1569 100644
--- a/libnativebridge/tests/Android.mk
+++ b/libnativebridge/tests/Android.mk
@@ -31,7 +31,6 @@
 $(foreach file,$(test_src_files), \
     $(eval include $(CLEAR_VARS)) \
     $(eval LOCAL_CLANG := true) \
-    $(eval LOCAL_CPPFLAGS := -std=gnu++11) \
     $(eval LOCAL_SHARED_LIBRARIES := $(shared_libraries)) \
     $(eval LOCAL_SRC_FILES := $(file)) \
     $(eval LOCAL_MODULE := $(notdir $(file:%.cpp=%))) \
@@ -41,7 +40,6 @@
 $(foreach file,$(test_src_files), \
     $(eval include $(CLEAR_VARS)) \
     $(eval LOCAL_CLANG := true) \
-    $(eval LOCAL_CPPFLAGS := -std=gnu++11) \
     $(eval LOCAL_SHARED_LIBRARIES := $(shared_libraries)) \
     $(eval LOCAL_SRC_FILES := $(file)) \
     $(eval LOCAL_MODULE := $(notdir $(file:%.cpp=%))) \
diff --git a/libnativebridge/tests/Android.nativebridge-dummy.mk b/libnativebridge/tests/Android.nativebridge-dummy.mk
index 551765a..e556f80 100644
--- a/libnativebridge/tests/Android.nativebridge-dummy.mk
+++ b/libnativebridge/tests/Android.nativebridge-dummy.mk
@@ -12,7 +12,7 @@
 LOCAL_SRC_FILES:= $(NATIVE_BRIDGE_COMMON_SRC_FILES)
 LOCAL_CLANG := true
 LOCAL_CFLAGS += -Werror -Wall
-LOCAL_CPPFLAGS := -std=gnu++11 -fvisibility=protected
+LOCAL_CPPFLAGS := -fvisibility=protected
 LOCAL_SHARED_LIBRARIES := libdl
 LOCAL_MULTILIB := both
 
@@ -27,7 +27,7 @@
 LOCAL_SRC_FILES:= $(NATIVE_BRIDGE_COMMON_SRC_FILES)
 LOCAL_CLANG := true
 LOCAL_CFLAGS += -Werror -Wall
-LOCAL_CPPFLAGS := -std=gnu++11 -fvisibility=protected
+LOCAL_CPPFLAGS := -fvisibility=protected
 LOCAL_LDFLAGS := -ldl
 LOCAL_MULTILIB := both
 
@@ -48,7 +48,7 @@
 LOCAL_SRC_FILES:= $(NATIVE_BRIDGE2_COMMON_SRC_FILES)
 LOCAL_CLANG := true
 LOCAL_CFLAGS += -Werror -Wall
-LOCAL_CPPFLAGS := -std=gnu++11 -fvisibility=protected
+LOCAL_CPPFLAGS := -fvisibility=protected
 LOCAL_SHARED_LIBRARIES := libdl
 LOCAL_MULTILIB := both
 
@@ -63,7 +63,7 @@
 LOCAL_SRC_FILES:= $(NATIVE_BRIDGE2_COMMON_SRC_FILES)
 LOCAL_CLANG := true
 LOCAL_CFLAGS += -Werror -Wall
-LOCAL_CPPFLAGS := -std=gnu++11 -fvisibility=protected
+LOCAL_CPPFLAGS := -fvisibility=protected
 LOCAL_LDFLAGS := -ldl
 LOCAL_MULTILIB := both
 
diff --git a/libnativeloader/Android.bp b/libnativeloader/Android.bp
index b4a69bc..30531bc 100644
--- a/libnativeloader/Android.bp
+++ b/libnativeloader/Android.bp
@@ -24,7 +24,6 @@
         "-Wall",
     ],
     cppflags: [
-        "-std=gnu++14",
         "-fvisibility=hidden",
     ],
     export_include_dirs: ["include"],
diff --git a/libsync/Android.bp b/libsync/Android.bp
index 4948aa5..a4e5599 100644
--- a/libsync/Android.bp
+++ b/libsync/Android.bp
@@ -34,7 +34,6 @@
         "-g",
         "-Wall",
         "-Werror",
-        "-std=gnu++11",
         "-Wno-missing-field-initializers",
         "-Wno-sign-compare",
     ],
diff --git a/logcat/tests/Android.mk b/logcat/tests/Android.mk
index a28664e..99c2e0a 100644
--- a/logcat/tests/Android.mk
+++ b/logcat/tests/Android.mk
@@ -25,7 +25,6 @@
     -Wall -Wextra \
     -Werror \
     -fno-builtin \
-    -std=gnu++11
 
 # -----------------------------------------------------------------------------
 # Benchmarks (actually a gTest where the result code does not matter)
diff --git a/logwrapper/Android.bp b/logwrapper/Android.bp
index 41f0726..7ee0464 100644
--- a/logwrapper/Android.bp
+++ b/logwrapper/Android.bp
@@ -14,7 +14,6 @@
     local_include_dirs: ["include"],
     cflags: [
         "-Werror",
-        "-std=gnu99",
     ],
 }
 
@@ -31,6 +30,5 @@
     ],
     cflags: [
         "-Werror",
-        "-std=gnu99",
     ],
 }
diff --git a/toolbox/Android.mk b/toolbox/Android.mk
index 4852fa4..5319ff4 100644
--- a/toolbox/Android.mk
+++ b/toolbox/Android.mk
@@ -42,7 +42,6 @@
 
 LOCAL_CFLAGS += $(common_cflags)
 LOCAL_C_INCLUDES += $(LOCAL_PATH)/upstream-netbsd/include/
-LOCAL_CONLYFLAGS += -std=gnu99
 
 LOCAL_SHARED_LIBRARIES := \
     libcutils \