FreeBSD Port: twelf-1.5R1_5

[FuRao(富饶)]

When I compiled twelf, i got the following output of `make build` under /usr/ports/lang/twelf.
It seems that the -number argument of texi2html is problematic.

Thanks.

... omitted ...

---------- Creating PostScript: twelf.ps
dvips -o twelf.ps twelf;
This is dvips(k) 5.95a Copyright 2005 Radical Eye Software (www.radicaleye.com)
' TeX output 2013.06.15:1225' -> twelf.ps
<tex.pro><texps.pro>. <cmmi12.pfb><cmr9.pfb><cmmi9.pfb><cmtt9.pfb><cmb10.pfb>
<cmmi10.pfb><cmsltt10.pfb><cmsl10.pfb><cmti10.pfb><cmtt10.pfb><cmbx12.pfb>
<cmsy10.pfb><cmr10.pfb>[1] [2] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]
[12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26]
[27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41]
[42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56]
[57] [58] [59] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [70] [71]
[72] [73] [74] [75] [76] [77] [78] [79] [80] [81] [82] [83] [84] [85] [86]
[87] [88] [89] [90] [91] [92] [-1] [-2] [-3] [-4]
---------- Creating HTML: twelf_*.html
texi2html -menu -number -split_chapter twelf.texi;
Option number is ambiguous (number-footnotes, number-sections)
Try `texi2html --help' for more information.
*** [twelf_toc.html] Error code 2

Stop in /usr/ports/lang/twelf/work/twelf/doc/guide.
*** [doc/dvi/twelf.dvi] Error code 1

Stop in /usr/ports/lang/twelf/work/twelf.
*** [do-build] Error code 1

Stop in /usr/ports/lang/twelf.