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.

Similar errors include:

error: ac_nonexistent.h: No such file or directory,

Such a mistake should be ignored. Keep looking down.