编译Codegen报错 请大侠指点

zyhorse2010

目前我的电脑装的Ubuntu 12.04的64位版本的,按照要求都安装了软件
sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32z-dev libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown libxml2-utils lib32readline5-dev gcc-4.5 g++-4.5 gcc-4.5-multilib g++-4.5-multilib wine
且执行check-env也并未报错,提示gcc找不到
**********checking Env************
Please check your building environment First!

[OS]: Ubuntu 12.04 (64-bit) [WARNING]
[Physical Memory Size] : 3886152 K-Bytes [WARNING]
[perl]: 5.14.2 (64-bit) [WARNING]
[python]: 2.7.3 (64-bit) [WARNING]
[gcc]: unknown (64-bit) [FAIL]
[bison]: 2.5 (64-bit) [WARNING]
[wine]: 1.4 (32-bit) [WARNING]

The detail information is in "checkenv.log"!

心想gcc肯定是没问题的,要不然kernel编译咋就不报错.....咱系统自带的啊,执行 ./mk new 编译到的codegen就报错
out/target/product/v01_codegen.log_err
, line 0: cgen error: column 1: syntax error

请教各位大侠是什么问题啊?