Support added for building using a GNU toolchain on Win32,

i.e. gcc -mno-cygwin on cygwin (a.k.a. mingw32, using egcs-1.1.2).

	* README.win32: Updated.
	* build-dll makefile.cygwin tests/makefile.cygwin: New files.
	* glib.h glib.def glibconfig.h.win32 makefile.msc: Slight updates.
	* gmain.c: No need to include <fcntl.h> and <io.h> on Win32.
	* gmain.c gutils.c testglib.c tests/string-test.c: Test for
	NATIVE_WIN32, not _MSC_VER.
	* gmutex.c: Must declare g_thread_functions_for_glib_use as
	exported (using the GUTILS_C_VAR macro).
	* gutils.c gmodule/libgplugin_[ab].c: LibMain not needed.
	* gmodule/gmoduleconf.h.win32: Need underscore with gcc.
	* gthread/gthread.c: With gcc on Win32, must use memcpy to assign
	value of g_thread_functions_for_glib_use (?).
	* makefile.msc tests/makefile.msc: Cosmetics.

glib/gutils.c

@@ -81,16 +81,6 @@ const guint glib_micro_version = GLIB_MICRO_VERSION;
 const guint glib_interface_age = GLIB_INTERFACE_AGE;
 const guint glib_binary_age = GLIB_BINARY_AGE;
 
-#if defined (NATIVE_WIN32) && defined (__LCC__)
-int __stdcall 
-LibMain (void         *hinstDll,
-	 unsigned long dwReason,
-	 void         *reserved)
-{
-  return 1;
-}
-#endif /* NATIVE_WIN32 && __LCC__ */
-
 void
 g_atexit (GVoidFunc func)
 {
@@ -736,7 +726,6 @@ g_iochannel_wakeup_peer (GIOChannel *channel)
 #endif /* Old IO Channels */
 
 #ifdef NATIVE_WIN32
-#ifdef _MSC_VER
 
 int
 gwin_ftruncate (gint  fd,
@@ -898,6 +887,4 @@ gwin_closedir (DIR *dir)
   return 0;
 }
 
-#endif /* _MSC_VER */
-
 #endif /* NATIVE_WIN32 */