# ./configure parser ^(?: (?:configuring[[:space:]]for[[:space:]](.+)) | (?: checking[[:space:]] (?: (?:build|host) [[:space:]]system[[:space:]]type | how[[:space:]]to[[:space:]](.+?) | for[[:space:]](.+?) | whether[[:space:]](?:to[[:space:]])?(.+?) )[\.]{3} ) (?: [[:space:]]+ (?: $ | (?: (yes) | (no) | (?<!^)(.*)(?=$|\n) ) ) )?.* )$ # ^(?:(?:configuring[[:space:]]for[[:space:]](.+))|(?:checking[[:space:]](?:(?:build|host)[[:space:]]system[[:space:]]type|how[[:space:]]to[[:space:]](.+?)|for[[:space:]](.+?)|whether[[:space:]](?:to[[:space:]])?(.+?))[\.]{3})(?:[[:space:]]+(?:$|(?:(yes)|(no)|(?<!^)(.*)(?=$|\n))))?.*)$