c3-lang/libffi

diff --git a/m4/ax_enable_builddir.m4 b/m4/ax_enable_builddir.m4
index 3fb8731..3cb2093 100644
--- a/m4/ax_enable_builddir.m4
+++ b/m4/ax_enable_builddir.m4
@@ -121,7 +121,8 @@ if test ".$srcdir" = ".." ; then
       test -f $srcdir/$cache_file  && mv $srcdir/$cache_file  .
       AC_MSG_RESULT(....exec $SHELL $srcdir/[$]0 "--srcdir=$srcdir" "--enable-builddir=$SUB" ${1+"[$]@"})
       case "[$]0" in # restart
-       [/\\]*) eval $SHELL "'[$]0'" "'--srcdir=$srcdir'" "'--enable-builddir=$SUB'" $ac_configure_args ;;
+       [[\\/]]* | ?:[[\\/]]*) # Asbolute name
+         eval $SHELL "'[$]0'" "'--srcdir=$srcdir'" "'--enable-builddir=$SUB'" $ac_configure_args ;;
        *) eval $SHELL "'$srcdir/[$]0'" "'--srcdir=$srcdir'" "'--enable-builddir=$SUB'" $ac_configure_args ;;
       esac ; exit $?
     fi