diff --git a/libc/src/__support/macros/properties/architectures.h b/libc/src/__support/macros/properties/architectures.h
index c88956ff41148..ecc93196be286 100644
--- a/libc/src/__support/macros/properties/architectures.h
+++ b/libc/src/__support/macros/properties/architectures.h
@@ -21,7 +21,7 @@
 #define LIBC_TARGET_ARCH_IS_GPU
 #endif
 
-#if defined(__pnacl__) || defined(__CLR_VER) || defined(LIBC_TARGET_ARCH_IS_GPU)
+#if defined(__CLR_VER) || defined(LIBC_TARGET_ARCH_IS_GPU)
 #define LIBC_TARGET_ARCH_IS_VM
 #endif
 
diff --git a/libcxx/include/__config b/libcxx/include/__config
index 1d547eac30952..cdd65585293d5 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -265,13 +265,6 @@ _LIBCPP_HARDENING_MODE_DEBUG
 //      When this option is used, the token passed to `std::random_device`'s
 //      constructor *must* be "/dev/urandom" -- anything else is an error.
 //
-// _LIBCPP_USING_NACL_RANDOM
-//      NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
-//      including accesses to the special files under `/dev`. This implementation
-//      uses the NaCL syscall `nacl_secure_random_init()` to get entropy.
-//      When this option is used, the token passed to `std::random_device`'s
-//      constructor *must* be "/dev/urandom" -- anything else is an error.
-//
 // _LIBCPP_USING_WIN32_RANDOM
 //      Use rand_s(), for use on Windows.
 //      When this option is used, the token passed to `std::random_device`'s
@@ -283,8 +276,6 @@ _LIBCPP_HARDENING_MODE_DEBUG
 #    define _LIBCPP_USING_GETENTROPY
 #  elif defined(__Fuchsia__)
 #    define _LIBCPP_USING_FUCHSIA_CPRNG
-#  elif defined(__native_client__)
-#    define _LIBCPP_USING_NACL_RANDOM
 #  elif defined(_LIBCPP_WIN32API)
 #    define _LIBCPP_USING_WIN32_RANDOM
 #  else
diff --git a/libcxx/include/limits b/libcxx/include/limits
index 1205e6a0c2781..e8581cf9c321d 100644
--- a/libcxx/include/limits
+++ b/libcxx/include/limits
@@ -219,7 +219,7 @@ protected:
   static _LIBCPP_CONSTEXPR const bool is_bounded = true;
   static _LIBCPP_CONSTEXPR const bool is_modulo  = !std::is_signed<_Tp>::value;
 
-#  if defined(__i386__) || defined(__x86_64__) || defined(__pnacl__) || defined(__wasm__)
+#  if defined(__i386__) || defined(__x86_64__) || defined(__wasm__)
   static _LIBCPP_CONSTEXPR const bool traps = true;
 #  else
   static _LIBCPP_CONSTEXPR const bool traps = false;
diff --git a/libcxx/src/random.cpp b/libcxx/src/random.cpp
index 5c6644811bfee..79815aadc7323 100644
--- a/libcxx/src/random.cpp
+++ b/libcxx/src/random.cpp
@@ -31,8 +31,6 @@
 #    include <linux/random.h>
 #    include <sys/ioctl.h>
 #  endif
-#elif defined(_LIBCPP_USING_NACL_RANDOM)
-#  include <nacl/nacl_random.h>
 #elif defined(_LIBCPP_USING_FUCHSIA_CPRNG)
 #  include <zircon/syscalls.h>
 #endif
@@ -93,30 +91,6 @@ unsigned random_device::operator()() {
   return r;
 }
 
-#elif defined(_LIBCPP_USING_NACL_RANDOM)
-
-random_device::random_device(const string& __token) {
-  if (__token != "/dev/urandom")
-    std::__throw_system_error(ENOENT, ("random device not supported " + __token).c_str());
-  int error = nacl_secure_random_init();
-  if (error)
-    std::__throw_system_error(error, ("random device failed to open " + __token).c_str());
-}
-
-random_device::~random_device() {}
-
-unsigned random_device::operator()() {
-  unsigned r;
-  size_t n = sizeof(r);
-  size_t bytes_written;
-  int error = nacl_secure_random(&r, n, &bytes_written);
-  if (error != 0)
-    std::__throw_system_error(error, "random_device failed getting bytes");
-  else if (bytes_written != n)
-    std::__throw_runtime_error("random_device failed to obtain enough bytes");
-  return r;
-}
-
 #elif defined(_LIBCPP_USING_WIN32_RANDOM)
 
 random_device::random_device(const string& __token) {
diff --git a/libcxx/test/std/language.support/support.limits/limits/numeric.limits.members/traps.pass.cpp b/libcxx/test/std/language.support/support.limits/limits/numeric.limits.members/traps.pass.cpp
index a9b1e44602bd2..66e149bf58d1b 100644
--- a/libcxx/test/std/language.support/support.limits/limits/numeric.limits.members/traps.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/limits/numeric.limits.members/traps.pass.cpp
@@ -14,8 +14,7 @@
 
 #include "test_macros.h"
 
-#if defined(__i386__) || defined(__x86_64__) || defined(__pnacl__) || \
-    defined(__wasm__)
+#if defined(__i386__) || defined(__x86_64__) || defined(__wasm__)
 static const bool integral_types_trap = true;
 #else
 static const bool integral_types_trap = false;
diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index 101079f09e1d2..f7d44d02c8a7c 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -5510,7 +5510,7 @@ template <typename ELFT> static GNUAbiTag getGNUAbiTag(ArrayRef<uint8_t> Desc) {
     return {"", "", /*IsValid=*/false};
 
   static const char *OSNames[] = {
-      "Linux", "Hurd", "Solaris", "FreeBSD", "NetBSD", "Syllable", "NaCl",
+      "Linux", "Hurd", "Solaris", "FreeBSD", "NetBSD", "Syllable",
   };
   StringRef OSName = "Unknown";
   if (Words[0] < std::size(OSNames))