diff --git a/libcxx/src/atomic.cpp b/libcxx/src/atomic.cpp
--- a/libcxx/src/atomic.cpp
+++ b/libcxx/src/atomic.cpp
@@ -16,7 +16,18 @@
 #ifdef __linux__
 
 #include <unistd.h>
+#if defined(__ve__)
+// VE doesn't have linux/futex.h.  But, VEOS implements some FUTEX system calls.
+// These system calls are good enough for libcxx.  Therefore, we define FUTEX
+// flags here locally to compile libcxx using FUTEX system calls.
+#  define FUTEX_WAIT         0
+#  define FUTEX_WAKE         1
+#  define FUTEX_PRIVATE_FLAG 128
+#  define FUTEX_WAIT_PRIVATE (FUTEX_WAIT | FUTEX_PRIVATE_FLAG)
+#  define FUTEX_WAKE_PRIVATE (FUTEX_WAKE | FUTEX_PRIVATE_FLAG)
+#else
 #include <linux/futex.h>
+#endif
 #include <sys/syscall.h>
 
 // libc++ uses SYS_futex as a universal syscall name. However, on 32 bit architectures