單就OS X 10.8.3的失敗，因爲子模塊更新失敗

Question

從GitHub檢查出單源和環境MDK和monolite運行./autogen.sh --prefix=/usr/local後安裝，我想make，然後我得到了以下錯誤：

make[4]: Nothing to be done for `all-am'. 
make[3]: Nothing to be done for `all-am'. 
Making all in runtime 
if test -w /Users/alp/workspace/mono/mcs; then :; else chmod -R +w /Users/alp/workspace/mono/mcs; fi 
cd /Users/alp/workspace/mono/mcs && make --no-print-directory -s NO_DIR_CHECK=1 PROFILES=' net_2_0 net_3_5 net_4_0 net_4_5 ' CC='gcc' all-profiles 
-n Bootstrap compiler: 
Mono C# compiler version 2.10.11.0 
make[7]: *** No rule to make target `../../external/ikvm/reflect/*.cs', needed by `../class/lib/basic/basic.exe'. Stop. 
make[6]: *** [do-all] Error 2 
make[5]: *** [all-recursive] Error 1 
make[4]: *** [profile-do--basic--all] Error 2 
make[3]: *** [profiles-do--all] Error 2 
make[2]: *** [all-local] Error 2 
make[1]: *** [all-recursive] Error 1 
make: *** [all] Error 2 

這是因爲external/ikvm是空的。所以我跑了git submodule init，很成功，後來我試了git submodule update --recursive。這時候，我得到了錯誤：

fatal: Needed a single revision 
Unable to find current revision in submodule path 'external/Lucene.Net' 

如果我跑git submodule出現負的所有子除了Lucene.Net：

$ git submodule 
88fb67b07621dfed054d8d75fd50672fb26349df external/Lucene.Net 
-471c3e0803a9f40a0acc8aeceb31de6ff93a52c4 external/Newtonsoft.Json 
-e77b12e6cc5ed260a98447f609e887337e44e299 external/aspnetwebstack 
-fc76b93e3e0064b2d751796878f9cbe88df1d5f4 external/cecil 
... 

爲什麼git submodule update是給我這個錯誤？

Answer 1

這應該工作：

rm -Rf external/Lucene.Net/ 
git submodule init 
git submodule update