Our application - creating the recipe

Now that our application is functional, we can create our recipe.

The first step is to create the file; for example, we can choose gpio-packt_0.1.bb.

• gpio-packt represents the name of the package (the PN variable).

• 0.1 represents the version number of the recipe (the PV variable).

• .bb represents the file extension (Bitbake).

The second step consists of placing the source code in a local repository, like this:

$ mkdir gpio-packt
$ cp /home/packt/gpio-example.c files/
$ ls gpio-packt
gpio-example.c

The recipe must be placed next to the gpio-packt directory, as shown here:

$ ls
gpio-packt/ gpio-packt.bb

After that, we can fill out our recipe like this:

DESCRIPTION = "gpio example" 
LICENSE="GPLv2" 
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL- 2.0;md5=801f80980d171dd6425610833a22dbe6" 
 
PR = "r0"  
 
SRC_URI = "file://gpio_example.c" 
 
do_compile() { 
        ${CC} ${CFLAGS} ${LDFLAGS} ${WORKDIR}/gpio_example...