In those cases, our recipe should inherit the allarch class that is inherited by recipes that do not produce architecture-specific output.

An example of this type of recipe, meta-custom/recipes-example/example-data/example-data_1.0.bb, may be seen here:

DESCRIPTION = "Example of data or configuration recipe"                          
SECTION = "examples"                                                             
 
                                                                                
LICENSE = "GPLv2"                                                                
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6" 

                                                                                 
SRCREV = "${AUTOREV}"                                                            
SRC_URI = "git://github.com/yoctocookbook2ndedition/examples.git                 
           file://example.data"                                                  

                                                                                 
S = "${WORKDIR}/git"                                                             
                                                                                 
inherit allarch                                                                  
                                                                                 
do_compile[noexec] = "1"                                                                                                                                              
 
                                                                                
do_install() {                                                                   
        install -d ${D}${sysconfdir}                                             
        install -d ${D}${sbindir}                                                
        install -m 0755 ${WORKDIR}/example.data ${D}/${sysconfdir}/              
        install -m 0755 ${S}/python-scripts/* ${D}/${sbindir}                    
} 

It assumes that the fictitious examples.git repository contains a python-scripts folder, which we want to include in our root filesystem.

A working recipe example can be found in the source that accompanies the book.