I have installed Yocto, and successfully ran host-prepare.sh script. I want to know that, to develop makefile based applications, what to do next, should install toolchain or ADT or kernel & filesystem images? Is there any documentation which has step by step process?
In many cases, one do not need to install Yocto at all, what is needed is just appropriate toolchain along with filesystem image to develop and test simple program with qemu (runqemu - which is emulator - a part of toolchain). These toolchains and filesystem images are available to download and ready to use. Refer 'Using Pre-Built Binaries and QEMU' section in this documentation.