Android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/Android.mk
/external/clearsilver/cs/Android.mk
/external/clearsilver/java-jni/Android.mk
/external/clearsilver/util/Android.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...