* Makefile.in: Build wincap.o.

* wincap.cc: New file.
        * wincap.h: Ditto.
        * autoload.cc: Add dynamic load statement for `CreateHardLinkA'.
        * dcrt0.cc (os_being_run): Eliminated.
        (osname): Ditto.
        (iswinnt): Ditto.
        (set_os_type): Ditto.
        (dll_crt0_1): Call wincap.init() instead of set_os_type().
        (_dll_crt0): Ditto.
        * environ.cc (set_chunksize): New function.
        (parse_thing): `forkchunk' setting now invokes function `set_chunksize'.
        * fork.cc (chunksize): Eliminated. Moved to be member of wincap.
        * host_dependent.h: Removed.
        * syscalls.cc (_link): Try using `CreateHardLinkA' first, if available.
        * cygheap.cc, dcrt0.cc, delqueue.cc, dir.cc,
        environ.cc, fhandler.cc, fhandler.h, fhandler_console.cc,
        fhandler_mem.cc, fork.cc, mmap.cc, net.cc, pinfo.cc, pinfo.h,
        security.cc, syscalls.cc, sysconf.cc, syslog.cc, thread.cc,
        times.cc, tty.cc, uinfo.cc, uname.cc, winsup.h: Use new wincap
        capability check throughout.
        * winsup.h: Include wincap.h. Eliminate extern declarations of
        `os_being_run' and `iswinnt'. Eliminate `os_type" definition.
        * include/cygwin/version.h: Bump version to 1.3.4.

winsup/cygwin/dcrt0.cc

@@ -34,7 +34,6 @@ details. */
 #include "shared_info.h"
 #include "cygwin_version.h"
 #include "dll_init.h"
-#include "host_dependent.h"
 
 #define MAX_AT_FILE_LEVEL 10
 
@@ -155,94 +154,6 @@ do_global_ctors (void (**in_pfunc)(), int force)
     atexit (do_global_dtors);
 }
 
-/* remember the type of Win32 OS being run for future use. */
-os_type NO_COPY os_being_run;
-char NO_COPY osname[40];
-bool iswinnt;
-
-/* set_os_type: Set global variable os_being_run with type of Win32
-   operating system being run.  This information is used internally
-   to manage the inconsistency in Win32 API calls between Win32 OSes. */
-/* Cygwin internal */
-static void
-set_os_type ()
-{
-  OSVERSIONINFO os_version_info;
-  const char *os;
-
-  memset (&os_version_info, 0, sizeof os_version_info);
-  os_version_info.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
-  GetVersionEx (&os_version_info);
-
-  iswinnt = 0;
-  switch (os_version_info.dwPlatformId)
-    {
-      case VER_PLATFORM_WIN32_NT:
-	os_being_run = winNT;
-	os = "NT";
-	iswinnt = 1;
-	break;
-      case VER_PLATFORM_WIN32_WINDOWS:
-	if (os_version_info.dwMinorVersion == 0)
-	  {
-	    os_being_run = win95;
-	    os = "95";
-	  }
-	else if (os_version_info.dwMinorVersion < 90)
-	  {
-	    os_being_run = win98;
-	    os = "98";
-	  }
-	else /* os_version_info.dwMinorVersion == 90 */
-	  {
-	    os_being_run = winME;
-	    os = "ME";
-	  }
-	break;
-      default:
-	os_being_run = unknown;
-	os = "??";
-	break;
-    }
-  __small_sprintf (osname, "%s-%d.%d", os, os_version_info.dwMajorVersion,
-		   os_version_info.dwMinorVersion);
-}
-
-host_dependent_constants NO_COPY host_dependent;
-
-/* Constructor for host_dependent_constants.  */
-
-void
-host_dependent_constants::init ()
-{
-  extern DWORD chunksize;
-  /* fhandler_disk_file::lock needs a platform specific upper word
-     value for locking entire files.
-
-     fhandler_base::open requires host dependent file sharing
-     attributes.  */
-
-  switch (os_being_run)
-    {
-    case winNT:
-      win32_upper = 0xffffffff;
-      shared = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
-      break;
-
-    case winME:
-    case win98:
-    case win95:
-    case win32s:
-      win32_upper = 0x00000000;
-      shared = FILE_SHARE_READ | FILE_SHARE_WRITE;
-      chunksize = 32 * 1024 * 1024;
-      break;
-
-    default:
-      api_fatal ("unrecognized system type");
-    }
-}
-
 /*
  * Replaces -@file in the command line with the contents of the file.
  * There may be multiple -@file's in a single command line
@@ -544,7 +455,7 @@ static NO_COPY STARTUPINFO si;
 child_info_fork NO_COPY *child_proc_info = NULL;
 static MEMORY_BASIC_INFORMATION sm;
 
-#define CYGWIN_GUARD ((iswinnt) ? PAGE_GUARD : PAGE_NOACCESS)
+#define CYGWIN_GUARD ((wincap.has_page_guard ()) ? PAGE_GUARD : PAGE_NOACCESS)
 
 // __inline__ void
 extern void
@@ -649,7 +560,7 @@ dll_crt0_1 ()
   do_global_ctors (&__CTOR_LIST__, 1);
 
   /* Set the os_being_run global. */
-  set_os_type ();
+  wincap.init ();
   check_sanity_and_sync (user_data);
 
   /* Nasty static stuff needed by newlib -- point to a local copy of
@@ -722,9 +633,6 @@ dll_crt0_1 ()
   ProtectHandle (hMainProc);
   ProtectHandle (hMainThread);
 
-  /* Initialize the host dependent constants object. */
-  host_dependent.init ();
-
   /* Initialize the cygwin subsystem if this is the first process,
      or attach to shared data structures if it's already running. */
   memory_init ();
@@ -888,8 +796,8 @@ _dll_crt0 ()
   strace.microseconds ();
 #endif
 
-  /* Set the os_being_run global. */
-  set_os_type ();
+  /* Set the os capabilities. */
+  wincap.init ();
 
   main_environ = user_data->envptr;
   *main_environ = NULL;