#
# `./configure` output.
next if not $non_verbose and $line =~ /^checking /;
- next if $line =~ /^\s*(?:C )?(?:C|c)ompiler[\s.]*:\s+$cc_regex(?:\s-std=[a-z0-9:+]+)?\s*$/
+ next if $line =~ /^\s*(?:C\s+)?
+ (?:C|c)ompiler[\s.]*:\s+
+ $cc_regex
+ (?:\s-std=[a-z0-9:+]+)?\s*$
+ /x
or $line =~ /^\s*(?:- )?(?:CC|CXX)\s*=\s*$cc_regex\s*$/
or $line =~ /^\s*-- Check for working (?:C|CXX) compiler: /
or $line =~ /^\s*(?:echo )?Using [A-Z_]+\s*=\s*/;