The steps are taken from the gumstix wiki page on webcams

and from here too

The following assumes the current working dir is ~/gumstix/gumstix-oe. To start with, make sure the OpenEmbedded install can build a root fs image successfully. To do this, run:

bitbake gumstix-basic-image

and check if it is successful. This will create a basic root FS image with minimal programs.

Meanwhile, partition an SD card this way: first partition: Fat16 - 50Mb; Second partition: Ext2; (on debian, install dosfstools package to have mkfs.vfat)

Now we need a kernel capable of booting off an SD card. Copy the OE config files to user.collections:

cp -r  com.gumstix.collection/conf/ user.collection/

Edit the verdex config file

vi user.collection/conf/machine/gumstix-custom-verdex.conf

and uncomment the line MACHINE_FEATURES  += "mmcroot"

# enable one of the following if you want to target build for uimage/rootfs on mmc/microSD or CF
MACHINE_FEATURES  += "mmcroot"
#MACHINE_FEATURES  += "cfroot"

Make sure dev files for ncurses are installed with

sudo apt-get install libncurses5-dev

Assuming the basic image build has already started, a default kernel config file is located at

tmp/work/gumstix-custom-verdex-angstrom-linux-gnueabi/gumstix-kernel-2.6.21-r1/linux-2.6.21

Enter the  directory, and configure other required kernel features with:

make ARCH=arm menuconfig

Copy the generated .config file to where we need it:

cp tmp/work/gumstix-custom-verdex-angstrom-linux-gnueabi/gumstix-kernel-2.6.21-r1/linux-2.6.21/.config user.collection/packages/linux/gumstix-kernel-2.6.21/gumstix-custom-verdex/defconfig

Build the new kernel

bitbake -c rebuild gumstix-kernel

The root fs image, kernel and module are located in tmp/deploy/glibc/images/gumstix-custom-verdex/

Assuming the two SD card partitions are mounted on /media/disk (fat16 kernel partition) and /media/disk-1 (ext2 root FS partition), copy the kernel (uImage), gumstix-factory.script and the root fs using:

sudo tar -zxvf tmp/deploy/glibc/images/gumstix-custom-verdex/gumstix-basic-image-gumstix-custom-verdex.tar.gz -C /media/disk-1/
sudo cp tmp/deploy/glibc/images/gumstix-custom-verdex/modules-2.6.21-r1-gumstix-custom-verdex.tgz /media/disk-1/home/root
cp extras/mmc-root/gumstix-factory.script /media/disk
cp tmp/deploy/glibc/images/gumstix-custom-verdex/uImage-2.6.21-r1-gumstix-custom-verdex.bin /media/disk/uImage

Unmount the SD card, place it back in the gumstix and start it.

On the gumstix, unpack the modules and copy the need ones (or all of them)

cd /home/root
tar -zxvf modules-2.6.21-r1-gumstix-custom-verdex.tgz
cp -r lib/modules/2.6.21/kernel/drivers/media/ /lib/modules/2.6.21/kernel/drivers/
depmod -ae

et voila