xm-dgux.h

gcc编译工具没有什么特别

/* Configuration for GCC for Intel i386 running DG/ux */

/* looks just like sysv4 for now */

#include "i386/xm-i386.h"
#include "xm-svr4.h"

/* If not compiled with GNU C, use the portable alloca.  */
#ifndef __GNUC__
#define USE_C_ALLOCA
#endif