devtool-method

DEVTOOL METHOD:

1)bitbake -c cleanall openssl
2)bitbake openssl
3)devtool modify openssl ===> It adds a "workspace" layer in build/conf/bblayers.conf
4)Make changes to the code
5)bitbake openssl ===> will compile from the above workspace/sources/openssl directory
6)devtool reset openssl ===> it will leave the above sources directory

https://wiki.yoctoproject.org/wiki/TipsAndTricks/Patching_the_source_for_a_recipe 




SRC_URI METHOD:

1)Create a patch file of your change by going to workspace/sources/openssl directory and then giving git diff > <path for .patch>

2)Add it to files directory

3)FILESEXTRAPATHS_prepend := "${THISDIR}/files:" ===> add this to your .bbappend

4)Add path of the patch to SRC_URI variable in your .bb recipe