a few 3g modem fixes

board/common/overlay/etc/init.d/S35wifi

@@ -10,7 +10,7 @@ iface=wlan0
 driver=wext
 
 sys_watch_conf="/etc/watch.conf"
-boot_watch_conf="/etc/watch.conf"
+boot_watch_conf="/boot/watch.conf"
 watch_conf="/data/etc/watch.conf"
 
 link_watch=yes

board/common/overlay/etc/init.d/S36ppp

@@ -47,6 +47,12 @@ watch() {
     done
 }
 
+udev_trigger_add() {
+    for ((i = 0; i < $1; i++)); do
+        /sbin/udevadm trigger --type=devices --action=add
+    done
+}
+
 start() {
     test -e $conf/auth || touch $conf/auth
     test -e $conf/extra || touch $conf/extra
@@ -57,6 +63,10 @@ start() {
 
     # wait for modem
     modem=$(head -n 1 $conf/modem)
+    if ! [ -e /dev/$modem ]; then
+        udev_trigger_add 4 &
+    fi
+
     count=0
     while true; do
         if [ -e /dev/$modem ] || [ $count -gt $link_watch_timeout ]; then

configs/raspberrypi_defconfig

@@ -6,6 +6,7 @@ BR2_CCACHE_DIR="$(TOPDIR)/.buildroot-ccache-raspberrypi"
 BR2_OPTIMIZE_2=y
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_4=y
 BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
+BR2_GLIBC_VERSION_2_22=y
 BR2_BINUTILS_VERSION_2_25_X=y
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_OPTIMIZATION="-pipe"

writeimage.sh

@@ -23,7 +23,7 @@ function msg() {
     echo ":: $1"
 }
 
-while getopts "a:d:f:h:i:ln:o:p:s:w" o; do
+while getopts "a:d:f:h:i:lm:n:o:p:s:w" o; do
     case "$o" in
         d)
             SDCARD_DEV=$OPTARG