* path.cc (path_conv::check): Move fs-specific settings to a point where we

know that we have filled out the filesystem information.
* path.h (path_conv::path_conv): Use consistent initialization for
constructors.
* include/sys/cygwin.h: Define CW_STRERROR.
* include/cygwin/version.h: Bump CYGWIN_VERSION_API_MINOR to 228.
* include/external.h: Implement CW_STRERROR.

winsup/cygwin/external.cc

@@ -197,7 +197,7 @@ extern "C" unsigned long
 cygwin_internal (cygwin_getinfo_types t, ...)
 {
   va_list arg;
-  unsigned long res = -1;
+  uintptr_t res = (uintptr_t) -1;
   va_start (arg, t);
 
   switch (t)
@@ -508,6 +508,12 @@ cygwin_internal (cygwin_getinfo_types t, ...)
 	    }
 	}
 	break;
+      case CW_STRERROR:
+	{
+	  int err = va_arg (arg, int);
+	  res = (uintptr_t) strerror (err);
+	}
+	break;
 
       default:
 	set_errno (ENOSYS);