yasm 安装 (汇编编译器)
tar zxvf yasm-1.2.0.tar.gz
cd yasm-1.2.0/
cat INSTALL
./configure --prefix=/usr/local/yasm
make
make install
export PATH="$PATH:/usr/local/yasm/bin"
/etc/profile 文件末尾添加export PATH="$PATH:/usr/local/yasm/bin"
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mac 下用