dlopen failed: *.so has unexpected e

最近几个写android有问到 dlopen failed: "*.so" has unexpected e_machine 错误，现给出解决方案：

readelf -h *.so 看一下头，如果是写android的so库，一般肯定包含一下信息

Class=ELF32
Machine=ARM

现在大部分android手机都只支持32位，即最高到armv7, 所以so库必须是32位的，且目标平台应该是ARM

gcc 编译适用于arm 的参数详询：

http://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html

http://blog.csdn.net/lanmo555/article/details/18698391

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