config.h.in

cygwin, 著名的在win32下模拟unix操作系统的东东

/* config.h.in.  Generated automatically from configure.in by autoheader.  */

/* Define if using alloca.c.  */
#undef C_ALLOCA

/* Define to one of _getb67, GETB67, getb67 for Cray-2 and Cray-YMP systems.
   This function is required for alloca.c support on those systems.  */
#undef CRAY_STACKSEG_END

/* Define if you have alloca, as a function or macro.  */
#undef HAVE_ALLOCA

/* Define if you have <alloca.h> and it should be used (not on Ultrix).  */
#undef HAVE_ALLOCA_H

/* If using the C implementation of alloca, define if you know the
   direction of stack growth for your system; otherwise it will be
   automatically deduced at run-time.
 STACK_DIRECTION > 0 => grows toward higher addresses
 STACK_DIRECTION < 0 => grows toward lower addresses
 STACK_DIRECTION = 0 => direction of growth unknown
 */
#undef STACK_DIRECTION

/* Define if DEBUGGING support is requested.  */
#undef DEBUGGING

/* Define if MALLOC_DEBUGGING support is requested.  */
#undef MALLOC_DEBUG

/* Define if building "extra" thread-safe Cygwin DLL.  */
#undef _CYG_THREAD_FAILSAFE

/* Define if GCC supports builtin memset.  */
#undef HAVE_BUILTIN_MEMSET

/* Define if building thread-safe Cygwin DLL.  */
#undef _MT_SAFE

/* Define if using new vfork functionality. */
#undef NEWVFORK