Hi Simon, > + @if ! indent --version 2> /dev/null | grep -q 'GNU indent'; then\
As mentioned in the Autoconf manual [1], the grep option '-q' is not portable. E.g. on Solaris 10: $ echo | grep -q x grep: illegal option -- q Usage: grep -hblcnsviw pattern file . . . The portable alternative is grep 'GNU indent' > /dev/null Bruno [1] https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.71/html_node/Limitations-of-Usual-Tools.html
