Still need to #define inline for MSVC
I only tested with VS2015 earlier, but previous versions apparently still
don't know that standard C99 keyword though it's documented on MSDN...
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index eebc214..da81f56 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -42,9 +42,9 @@
#include "sha512.h"
#endif
-#if defined(__ARMCC_VERSION) && !defined(inline)
+#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && !defined(inline)
#define inline __inline
-#endif /* __ARMCC_VERSION */
+#endif
/* Determine minimum supported version */
#define MBEDTLS_SSL_MIN_MAJOR_VERSION MBEDTLS_SSL_MAJOR_VERSION_3