entropy_poll: define _GNU_SOURCE only if it's not defined

particle-iot · Jul 24, 2019 · 4e4e631 · 4e4e631
1 parent 819c4aa
commit 4e4e631
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/library/entropy_poll.c b/library/entropy_poll.c
@@ -19,7 +19,7 @@
  *  This file is part of mbed TLS (https://tls.mbed.org)
  */
 
-#if defined(__linux__)
+#if defined(__linux__) && !defined(_GNU_SOURCE)
 /* Ensure that syscall() is available even when compiling with -std=c99 */
 #define _GNU_SOURCE
 #endif