hdr,sys dlfcn,dl,ldr,dll
hdr dlldefs
lib dlopen,shl_load,loadbind,dllload,dllfind
cat{
#if !defined(SHOPT_FS_3D) && ( _lib_dllfind || _lib_dlopen || _lib_shl_load || _lib_loadbind )
# define SHOPT_FS_3D 1
#endif /* !SHOPT_FS_3D */
#if SHOPT_FS_3D
# undef mount
# include <fs3d.h>
#endif /* SHOPT_FS_3D */
}end