Switch to 32/64 datatypes:

* Makefile.in (OBSOLETE_FUNCTIONS): Add open acl aclcheck aclfrommode
	aclfrompbits aclfromtext aclsort acltomode acltopbits acltotext chown
	facl fchown fgetpos fopen freopen fseeko fsetpos fstat ftello
	ftruncate getegid geteuid getgid getgrent getgrgid getgrnam getgroups
	getpwuid getpwuid_r getuid initgroups lchown lseek lstat mknod mmap
	seekdir setegid seteuid setgid setgroups setregid setreuid setuid stat
	telldir truncate.
	(NEW_FUNCTIONS): Add _open64 acl32 aclcheck32 aclfrommode32
	aclfrompbits32 aclfromtext32 aclsort32 acltomode32 acltopbits32
	acltotext32 chown32 facl32 fchown32 fgetpos64 fopen64 freopen64
	fseeko64 fsetpos64 fstat64 ftello64 ftruncate64 getegid32 geteuid32
	getgid32 getgrent32 getgrgid32 getgrnam32 getgroups32 getpwuid32
	getpwuid_r32 getuid32 initgroups32 lchown32 lseek64 lstat64 mknod32
	mmap64 seekdir64 setegid32 seteuid32 setgid32 setgroups32 setregid32
	setreuid32 setuid32 stat64 telldir64 truncate64 to substitute the
	above.
	* cygserver_shm.h (class client_request_shm): Change uid_t and gid_t
	members to __uid32_t and __gid32_t.
	* cygwin.din: Add symbols acl32 aclcheck32 aclfrommode32
	aclfrompbits32 aclfromtext32 aclsort32 acltomode32 acltopbits32
	acltotext32 facl32 fgetpos64 fopen64 freopen64 fseeko64 fsetpos64
	_fstat64 ftello64 _lseek64 mknod32 _open64.
	* glob.c: Include perprocess.h.
	(globtilde): Call getpwuid32 and getuid32 instead of getpwuid and
	getuid.
	(g_lstat): Check for applications API version to call the appropriate
	typed gl_lstat function.
	(g_stat): Ditto for gl_stat.
	* shm.cc (client_request_shm::client_request_shm): Call geteuid32
	and getegid32 instead of geteuid and getegid throughout.
	* syscalls.cc (_open64): New alias for open.
	(_lseek64): New alias for lseek64.
	(_fstat64): New alias for fseek64.
	(mknod32): New function.
	(mknod): Calls mknod32 now.
	* winsup.h: Make function declarations for getuid32, geteuid32,
	and getpwuid32 accessible for plain C sources.  Add declarations
	for getegid32 and getpwnam.
	* include/cygwin/version.h: Bum API minor number to 78.
	* include/sys/cygwin.h: Guard C++ specific members of struct
	per_process against inclusion in plain C sources.
	* include/sys/mman.h (mman): Add guard to avoid type clash when
	compiling Cygwin.

winsup/cygwin/syscalls.cc

@@ -13,6 +13,9 @@ details. */
 #define _open __FOO_open__
 #define _read __FOO_read__
 #define _write __FOO_write__
+#define _open64 __FOO_open64__
+#define _lseek64 __FOO_lseek64__
+#define _fstat64 __FOO_fstat64__
 
 #include "winsup.h"
 #include <sys/stat.h>
@@ -52,6 +55,9 @@ details. */
 #undef _open
 #undef _read
 #undef _write
+#undef _open64
+#undef _lseek64
+#undef _fstat64
 
 SYSTEM_INFO system_info;
 
@@ -503,6 +509,9 @@ open (const char *unix_path, int flags, ...)
 extern "C" int _open (const char *, int flags, ...)
   __attribute__ ((alias ("open")));
 
+extern "C" int _open64 (const char *, int flags, ...)
+  __attribute__ ((alias ("open")));
+
 extern "C" __off64_t
 lseek64 (int fd, __off64_t pos, int dir)
 {
@@ -527,6 +536,9 @@ lseek64 (int fd, __off64_t pos, int dir)
   return res;
 }
 
+extern "C" int _lseek64 (int fd, __off64_t pos, int dir)
+  __attribute__ ((alias ("lseek64")));
+
 extern "C" __off32_t
 lseek (int fd, __off32_t pos, int dir)
 {
@@ -997,6 +1009,9 @@ fstat64 (int fd, struct __stat64 *buf)
   return res;
 }
 
+extern "C" int _fstat64 (int fd, __off64_t pos, int dir)
+  __attribute__ ((alias ("fstat64")));
+
 extern "C" int
 _fstat (int fd, struct __stat32 *buf)
 {
@@ -1928,12 +1943,18 @@ regfree ()
    fileutils) assume its existence so we must provide a stub that always
    fails. */
 extern "C" int
-mknod (const char *_path, mode_t mode, dev_t dev)
+mknod32 (const char *_path, mode_t mode, __dev32_t dev)
 {
   set_errno (ENOSYS);
   return -1;
 }
 
+extern "C" int
+mknod (const char *_path, mode_t mode, __dev16_t dev)
+{
+  return mknod32 (_path, mode, (__dev32_t) dev);
+}
+
 extern "C" int
 mkfifo (const char *_path, mode_t mode)
 {