> /usr/local/opt/qt/bin/qmake --version 2>&1 | > /usr/local/opt/gnu-sed/libexec/gnubin/sed > '/^.*\([0-9]\+\.[0-9]\+\.[0-9]\+\).*$/!d;s//\1/'
Please try this regexp.
'/^.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*$/!d;s//\1/'
According to the sed info file `\+' is a GNU sed extension.
Werner
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