In case of any unset variable, make ./configure exit with nonzero value;
an attempt to expand an unset variable is a bug in the script
(usually a spelling mistake) and those should not pass through
unnoticed.
#! /bin/sh
+set -u
+
# Test whether this shell is capable of parameter substring processing.
( option='a/b'; : ${option#*/} ) 2>/dev/null || {
echo "
else
printf "No (but that's fine).\n"
have_valgrind=0
+ valgrind_cflags=
fi
printf "Checking for bash-completion (>= 1.90)... "
WITH_BASH=0
fi
-if [ -z "${EMACSLISPDIR}" ]; then
+if [ -z "${EMACSLISPDIR-}" ]; then
EMACSLISPDIR="\$(prefix)/share/emacs/site-lisp"
fi
-if [ -z "${EMACSETCDIR}" ]; then
+if [ -z "${EMACSETCDIR-}" ]; then
EMACSETCDIR="\$(prefix)/share/emacs/site-lisp"
fi