hal.h in install image different then hal.h in github?

Hal.h in install image seems not to match hal.h in GitHub? I'm trying to modify the streamer component when I call it normally with no changes it works when I recompile and install the source code from github with no changes at all it refuses to run the function hal_export_functf that function is in hal.h on GitHub, but not in hal.h on the install image, that one only has hal_export_funct why is that and what should i do?
 

You need to checkout the correct branch. The release versions are defined by a tag dso that are locked in. You can see this in git on the branch drop down if you select the tag tab. This will let you see the exact source for the version you have.

to get the source of 2.9.8 on your pc its  :git checkout v2.9.8