Android Froyo基于32 bit Ubuntu 10.10编译问题

代码下载的是Froyo 2.2版本的，直接make，出现错误提示：

                You are attempting to build on a 32-bit system.
                Only 64-bit build environments are supported beyond froyo/2.2

        查找资料，确定下面的修改步骤（-表示删除行，+表示添加行）：

              1、修改build/core目录下的main.mk文件，修改策略为：
                       ifeq ($(BUILD_OS),linux)
                        build_arch := $(shell uname -m)
                       -ifneq (64,$(findstring 64,$(build_arch)))
                       +ifneq (i686,$(findstring i686,$(build_arch)))
                      $(warning ************************************************************)
                      $(warning You are attempting to build on a 32-bit system.)
                      $(warning Only 64-bit build environments are supported beyond froyo/2.2.)

              2、修改下列文件：
                       /external/clearsilver/cgi/.mk
                       /external/clearsilver/cs/.mk
                       /external/clearsilver/java-jni/.mk
                       /external/clearsilver/util/.mk
                     4个文件的修改策略相同，为：
                       # This forces a 64-bit build for Java6
                        -LOCAL_CFLAGS += -m64
                        -LOCAL_LDFLAGS += -m64
                        +LOCAL_CFLAGS += -m32
                        +LOCAL_LDFLAGS += -m32

        接下来的编译可能会遇到很多因为缺少相应模块而产生的错误，请首先安装下列软件模块：

                        bison
                         jdk6
                        g++ (build-essential)
                        zlib1g-dev
                        flex
                        libncurses-dev
                        gperf

然后，就是make之后漫长的等待...