编译远古的C语言程序时报错的一些解决方法
Some Solutions to Errors in Compiling Old C Language Programs
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error: this statement may fall through [-Werror=implicit-fallthrough=]
make CFLAGS='-Wno-implicit-fallthrough'
error: right-hand operand of comma expression has no effect [-Werror=unused-value]
这是因为源码中有些函数定义不规范，高版本的gcc编译时会报错。解决办法是在 ./configure 后面加上 --disable-werror
--disable-werror -Wno-format-security
configure: error: Old ABI no longer supported
--host=arm-linux-gnueabi
