diff --git a/ndk/platforms/android-L/arch-arm/symbols/libc.so.functions.txt b/ndk/platforms/android-L/arch-arm/symbols/libc.so.functions.txt
index 40fc0ebe9..83a51eef5 100644
--- a/ndk/platforms/android-L/arch-arm/symbols/libc.so.functions.txt
+++ b/ndk/platforms/android-L/arch-arm/symbols/libc.so.functions.txt
@@ -263,7 +263,6 @@ __sched_getaffinity
 __set_tid_address
 __set_tls
 __sigaction
-__signalfd4
 __snprintf_chk
 __socket
 __sprintf_chk
diff --git a/ndk/platforms/android-L/arch-arm64/symbols/libc.so.functions.txt b/ndk/platforms/android-L/arch-arm64/symbols/libc.so.functions.txt
index c5e923cd5..c0c86a525 100644
--- a/ndk/platforms/android-L/arch-arm64/symbols/libc.so.functions.txt
+++ b/ndk/platforms/android-L/arch-arm64/symbols/libc.so.functions.txt
@@ -158,7 +158,6 @@ atoi
 atol
 atoll
 basename
-basename_r
 bind
 bindresvport
 brk
@@ -200,7 +199,6 @@ delete_module
 difftime
 dirfd
 dirname
-dirname_r
 div
 dn_expand
 dprintf
diff --git a/ndk/platforms/android-L/arch-mips/symbols/libc.so.functions.txt b/ndk/platforms/android-L/arch-mips/symbols/libc.so.functions.txt
index a462204f3..5fc9e4e73 100644
--- a/ndk/platforms/android-L/arch-mips/symbols/libc.so.functions.txt
+++ b/ndk/platforms/android-L/arch-mips/symbols/libc.so.functions.txt
@@ -128,7 +128,6 @@ __sched_getaffinity
 __set_tid_address
 __set_tls
 __sigaction
-__signalfd4
 __snprintf_chk
 __socket
 __sprintf_chk
diff --git a/ndk/platforms/android-L/arch-mips64/symbols/libc.so.functions.txt b/ndk/platforms/android-L/arch-mips64/symbols/libc.so.functions.txt
index a88081a46..c0c86a525 100644
--- a/ndk/platforms/android-L/arch-mips64/symbols/libc.so.functions.txt
+++ b/ndk/platforms/android-L/arch-mips64/symbols/libc.so.functions.txt
@@ -124,7 +124,6 @@ __umask_chk
 __vsnprintf_chk
 __vsprintf_chk
 _exit
-_flush_cache
 _getlong
 _getshort
 _longjmp
@@ -159,7 +158,6 @@ atoi
 atol
 atoll
 basename
-basename_r
 bind
 bindresvport
 brk
@@ -201,7 +199,6 @@ delete_module
 difftime
 dirfd
 dirname
-dirname_r
 div
 dn_expand
 dprintf
diff --git a/ndk/platforms/android-L/arch-x86/symbols/libc.so.functions.txt b/ndk/platforms/android-L/arch-x86/symbols/libc.so.functions.txt
index 41e7b6bfc..9eb705e07 100644
--- a/ndk/platforms/android-L/arch-x86/symbols/libc.so.functions.txt
+++ b/ndk/platforms/android-L/arch-x86/symbols/libc.so.functions.txt
@@ -128,7 +128,6 @@ __sched_getaffinity
 __set_thread_area
 __set_tid_address
 __sigaction
-__signalfd4
 __snprintf_chk
 __socket
 __sprintf_chk
diff --git a/ndk/platforms/android-L/arch-x86_64/symbols/libc.so.functions.txt b/ndk/platforms/android-L/arch-x86_64/symbols/libc.so.functions.txt
index c5e923cd5..c0c86a525 100644
--- a/ndk/platforms/android-L/arch-x86_64/symbols/libc.so.functions.txt
+++ b/ndk/platforms/android-L/arch-x86_64/symbols/libc.so.functions.txt
@@ -158,7 +158,6 @@ atoi
 atol
 atoll
 basename
-basename_r
 bind
 bindresvport
 brk
@@ -200,7 +199,6 @@ delete_module
 difftime
 dirfd
 dirname
-dirname_r
 div
 dn_expand
 dprintf