Build openwrt packages with correct rundir

It turns out that the openwrt systems that I have been using to test my
OpenWRT package builds (All Turris Omnia systems) appears to have had a
vendor patch applied to create a symlink from "/run" to "/var/run".  On
a vanilla OpenWRT system, there is no "/run".  Use the new configure
option to set the correct run dir location.

(Also deal with the OpenWRT auto conf tools being too old to include the
runstatedir option)

(See PR #48, #49)

configure.ac

@@ -43,6 +43,12 @@ case "$host_os" in
         ;;
 esac
 
+AC_ARG_WITH([rundir],
+    AS_HELP_STRING([--with-rundir=DIR], [location of the system /run dir]),
+    [rundir=$withval],
+    [rundir="/run"]
+)
+
 AC_ARG_WITH([systemddir],
     AS_HELP_STRING([--with-systemddir=DIR], [Where to install systemd units]),
     [systemddir=$withval],
@@ -120,10 +126,6 @@ AS_IF([test "x$prefix" = "xNONE" ],
     prefix=/usr/local
 )
 
-AS_IF([test "x$runstatedir" = 'x${localstatedir}/run' ],
-    runstatedir=/run
-)
-
 # The systemd unit dir should be in a sane location (based on the prefix) but
 # that is not always a dir underneath the prefix.  Apply another hack
 AS_IF([test "x$systemddir" = "x" ],
@@ -138,7 +140,7 @@ AS_IF([test "x$systemddir" = "x" ],
 CONFIG_DOCDIR=$(eval echo $(eval echo $docdir))
 CONFIG_MANDIR=$(eval echo $(eval echo $mandir))
 CONFIG_PREFIX=$prefix
-CONFIG_RUNDIR=$runstatedir
+CONFIG_RUNDIR=$rundir
 CONFIG_SYSTEMDDIR=$systemddir
 
 configure_command=$0$ac_configure_args_raw

packages/openwrt/Makefile

@@ -57,7 +57,7 @@ endef
 define Build/Configure
 	( cd $(PKG_BUILD_DIR); \
 	./autogen.sh; \
-	LDFLAGS=--static ./configure )
+	LDFLAGS=--static ./configure --with-rundir=/var/run )
 endef
 
 define Package/n3n-edge/conffiles