第二次编译GCC出错，救命！

shangxuan

大侠救命： 怎么出这样的错误信息：
我明明安装了gcc的C++语言支持。
......
checking linker --as-needed support... yes
configure: error:
The following requested languages were not found: c++
The following languages were available: c treelang
make: *** [configure-gcc] Error 1
........

bb_sun

应该在sources目录里一起释放三个压缩包，gcc-core,gcc-g++和gcc-testsuite