+dnl detect Windows environment...
+AC_CANONICAL_HOST
+AC_MSG_CHECKING([for Windows environment])
+case "$host" in
+ *-*-mingw*)
+ os_win32=yes;;
+ *)
+ os_win32=no;;
+esac
+AC_MSG_RESULT([$os_win32])
+AM_CONDITIONAL(WIN32, test "$os_win32" = "yes")
+