+printf "Checking if sphinx is available and supports nroff output... "
+if hash sphinx-build > /dev/null 2>&1 && python -m sphinx.writers.manpage > /dev/null 2>&1 ; then
+ printf "Yes.\n"
+ have_sphinx=1
+ have_rst2man=0
+else
+ printf "No (falling back to rst2man).\n"
+ have_sphinx=0
+
+ printf "Checking if rst2man is available... "
+ if rst2man -V > /dev/null 2>&1; then
+ printf "Yes.\n"
+ have_rst2man=1
+ else
+ printf "No (so will not install man pages).\n"
+ have_rst2man=0
+ fi
+fi
+