A package recipe is how we can instruct BitBake to fetch, unpack, compile, and install our application, kernel module, or any software provided by a project. Poky includes several classes that abstract the process for the most common development tools as projects based on Autotools, CMake, and QMake. A list of classes included in Poky can be seen in the Yocto Project Reference Manual.

One simple recipe that does the compile and install tasks explicitly is provided as follows:

DESCRIPTION = "Simple helloworld application" 
SECTION = "examples" 
LICENSE = "MIT" 
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302" 

SRC_URI = "file://helloworld.c" 

S = "${WORKDIR}" 

do_compile() { 
        ${CC} helloworld.c -o helloworld 
} 

do_install() { 
        install -d ${D}${bindir} 
        install -m 0755 helloworld ${D}${bindir} 
} 

The do_compile and do_install code blocks provide the Shell Scripting commands to build and install the...