Add missing platform macro defines in pk_decrypt.c
#include "mbedtls/platform.h"
#else
#include <stdio.h>
+#include <stdlib.h>
#define mbedtls_printf printf
-#endif
+#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
defined(MBEDTLS_FS_IO) && defined(MBEDTLS_ENTROPY_C) && \
