一般的：
configure:3866: $? = 0
configure:3855: gcc -V >&5
gcc: error: unrecognized command line option '-V'
gcc: fatal error: no input files
compilation terminated.
configure:3866: $? = 1
configure:3855: gcc -qversion >&5
gcc: error: unrecognized command line option '-qversion'; did you mean '--version'?
gcc: fatal error: no input files
compilation terminated.
类似错误还有：
error: ac_nonexistent.h: No such file or directory,出现这样的错误，不必理会。继续向下找。
