For Galileo , two SD card images are being offered . One with name SDCard.1.0.4.tar.bz2 and second one is iotdk-ide-linux.tar.bz2 .
I have few queries about them : -
Q1 : Why two images are being offered ? what is the difference between the two images ?
Q2: Are both the images are based on Yocto distribution ?
Q3 Does Iotdk-ide-linux.tar.bz2 image support the Arduino environment or it is just to be used with eclipse ?
Q4 How can i locate the source code of the Kernel used ?
Q1: iotdk is eglibc based (which means closer to glibc) whereas the other one is uclibc based [discussed in other threads on this forum I think]
Q2: yes - but different Yocto versions afaik
Q3: yes, Arduino is supported
Q4: you'd have to check the Yocto recipes for the kernel. For iotdk you find everything on meta-intel-iot-devkit - Intel IoT Developer Kit metadata