[yocto] How can I use PREFERRED_VERSION_ ?

[Riko]

Dear Yocto Team Members,

How can I use PREFERRED_VERSION_ ?


ERROR: Multiple versions of openssl are due to be built 
(/home/bianchi/poky/openembedded-core/meta/recipes-connectivity/openssl/openssl_1.1.0f.bb 
/home/bianchi/poky/meta/recipes-connectivity/openssl/openssl_1.0.2k.bb). 
Only one version of a given PN should be built in any given build. You 
likely need to set PREFERRED_VERSION_openssl to select the correct 
version or don't depend on multiple versions.


Regards,

Riko