+# Check that gettext version matches what's in configure.ac.
+# FIXME: We shouldn't have to modify configure.ac every time
+# a new gettext version comes out.
+gettext_have=$(LC_ALL=C gettext --version | sed 's/.* //; 1q')
+gettext_need=$(
+ sed -n '/^AM_GNU_GETTEXT_VERSION/{ s/.*\[//; s/].*//; p; q; }' configure.ac
+)
+test "$gettext_have" = "$gettext_need" || {
+ echo >&2 "$0: Your gettext version is $gettext_have."
+ echo >&2 "$0: Please install and use gettext-$gettext_need instead."
+ exit 1
+}
+