Check for IAR in gmtime macros
diff --git a/library/threading.c b/library/threading.c
index 0496b97..7231f2f 100644
--- a/library/threading.c
+++ b/library/threading.c
@@ -35,8 +35,9 @@
#include "mbedtls/threading.h"
-#if !defined(_WIN32) && (defined(unix) || defined(__unix) || \
- defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)))
+#if !defined(_WIN32) && !defined(__IAR_SYSTEMS_ICC__) && (defined(unix) || \
+ defined(__unix) || defined(__unix__) || (defined(__APPLE__) && \
+ defined(__MACH__)))
#include <unistd.h>
#if !defined(_POSIX_VERSION) || 200112L > _POSIX_THREAD_SAFE_FUNCTIONS
/*
@@ -48,7 +49,8 @@
*/
#define THREADING_USE_GMTIME
#endif /* !_POSIX_VERSION || 200112L > _POSIX_THREAD_SAFE_FUNCTIONS */
-#endif /* !_WIN32 && (unix || __unix || __unix__ || (__APPLE__ && __MACH__)) */
+#endif /* !_WIN32 && !__IAR_SYSTEMS_ICC__ && (unix || __unix || __unix__ ||
+ * (__APPLE__ && __MACH__)) */
#if defined(MBEDTLS_THREADING_PTHREAD)
static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )