udev: Print error when udev support is not available and not disabled

diff --git a/configure.ac b/configure.ac
index 6dc3546..6928cf3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -361,10 +361,8 @@ AC_ARG_ENABLE(udev, AC_HELP_STRING([--disable-udev],
                        [don't use udev support even if available]),
                                                [enable_udev=${enableval}])
 if (test "${enable_udev}" != "no"); then
-       PKG_CHECK_MODULES(UDEV, libudev >= 143,
-                               [enable_udev="yes"], [enable_udev="no"])
-fi
-if (test "${enable_udev}" = "yes"); then
+       PKG_CHECK_MODULES(UDEV, libudev >= 143, [enable_udev="yes"],
+                               AC_MSG_ERROR(libudev >= 143 is required))
        UDEV_DATADIR="`$PKG_CONFIG --variable=udevdir udev`"
        if (test -z "${UDEV_DATADIR}"); then
                UDEV_DATADIR="${sysconfdir}/udev/rules.d"