John Gemignani

You can have multiple development versions of PG installed in your development directories. However, don't install them to run under root or under the system. You want to be able...

You will need to download the PostgreSQL "source" and build it in your development environment. Go to the following link and on the left you'll see Source, under Downloads -...

I don't know if these issues cause that error. - You shouldn't be using sudo for any of this. - You will need to download the source code for PG...

Are you building the correct AGE branch for PG12?

Is that the only error? What OS?

Actually, that error shows that you aren't actually building the extension from the AGE ALPHA PG12 release.

Actually, that error shows that you aren't actually building the extension from the AGE ALPHA PG12 release.

Mine are under my development home directory, as an example.

There is no need to install or run PostgreSQL under root, so no need to have it in the sudoers file. You should - 1. Make sure that you have...

I have updated the above comment to make it more helpful. Additionally, all 3 of you are encouraged to help each other out.