5.7.6.2 Diagnostics-show-caret Options
The -fdiagnostics-show-caret
option has each diagnostic include the original
source line and a caret character, ‘^’, indicating the column. This is the default
action if no option is specified.
The -fno-diagnostics-show-caret
form of this option suppresses the
source line and caret from all diagnotics.