C compiler test failed.

　　错误如下：

gcc is unable to create an executable file.
If gcc is a cross-compiler, use the --enable-cross-compile option.
Only do this if you know what cross compiling means.
C compiler test failed.

　　本来是能编译成功的。怎么突然出问题？解决办法：

• 删除目录
• 重新下载解压编译。

　　平常一定要做好备份。