No stdint.h on OpenVMS, it is inttypes.h instead, some projects use HAVE_STDINT_H.
/*-**************************************************************
* Basic Types
*****************************************************************/
-#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
+#if !defined (__VMS) && ( defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
# include <stdint.h>
typedef uint8_t BYTE;
typedef uint16_t U16;