commit 2682edf205177a9639d2126238d6f83e19fd5d71
author Nicholas Wilson <nicholas.wilson@realvnc.com> Tue Dec 05 12:08:15 2017 +0000
committer Nicholas Wilson <nicholas.wilson@realvnc.com> Mon Jun 25 12:00:26 2018 +0100
tree 76e26a5af26c96ce0f6db2ce2994925aa028526a
parent 512b4ee9c7421c4d70352d2a37a6ef1038a515b0

Fix build using -std=c99

In each place where POSIX/GNU functions are used, the file must declare
that it wants POSIX functionality before including any system headers.

library/entropy_poll.c

diff --git a/library/entropy_poll.c b/library/entropy_poll.c
index fd96258..31f608b 100644
--- a/library/entropy_poll.c
+++ b/library/entropy_poll.c
@@ -19,6 +19,11 @@
  *  This file is part of mbed TLS (https://tls.mbed.org)
  */
 
+#if defined(__linux__)
+/* Ensure that syscall() is available even when compiling with -std=c99 */
+#define _GNU_SOURCE
+#endif
+
 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/config.h"
 #else