解决 Only 64-bit build environments are supported beyond froyo/2.2.

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在使用：$ repo init -u git://Android.git.kernel.org/platform/manifest.git$ repo sync下载完代码后，进行make，$cd ~/mydroid
$make却出现了如下错误：build/core/main.mk:73: You are attempting to build on a 32-bit system.build/core/main.mk:74: Only 64-bit build environments are supported beyond froyo/2.2.这是因为froyo/2.2默认只支持64-bit，看到有些网友还要去下载64-比他的操作系统，很是麻烦，于是通过不断搜索资料终于解决，
解决办法：需要进行如下修改即可，将./external/clearsilver/cgi/Android.mk./external/clearsilver/java-jni/Android.mk./external/clearsilver/util/Android.mk./external/clearsilver/cs/Android.mk四个文件中的LOCAL_CFLAGS += -m64LOCAL_LDFLAGS += -m64注释掉，或者将“64”换成“32”LOCAL_CFLAGS += -m32LOCAL_LDFLAGS += -m32
然后，将./build/core/main.mk 中的ifneq (64,$(findstring 64,$(build_arch)))改为：ifneq (i686,$(findstring i686,$(build_arch)))