It seems this is one of these things I keep forgetting how to perform correctly, despite taking notes and reading the documentation. I thought I had upgraded postgresql from 9.5.7 to 9.6.3-r1 a couple of weeks ago.
Today depclean asked me to remove 9.5.7 and after a moment's hesitation I went along with it. To my surprise I got this at the end of it: [snip...] <<< dir /usr/include/postgresql-9.5/server/catalog <<< dir /usr/include/postgresql-9.5/server/bootstrap <<< dir /usr/include/postgresql-9.5/server/access <<< dir /usr/include/postgresql-9.5/server <<< dir /usr/include/postgresql-9.5/libpq <<< dir /usr/include/postgresql-9.5/internal/libpq <<< dir /usr/include/postgresql-9.5/internal <<< dir /usr/include/postgresql-9.5/informix/esql <<< dir /usr/include/postgresql-9.5/informix <<< dir /usr/include/postgresql-9.5 --- !empty dir /usr/include --- !empty dir /usr/bin --- !empty dir /usr --- !empty dir /etc/postgresql-9.5 --- !empty dir /etc/pam.d --- !empty dir /etc/init.d --- !empty dir /etc/conf.d --- !empty dir /etc Unsetting 9.5 as default...done. Setting 9.6 as the default...ln: failed to create symbolic link '/usr/include/libpq-fe.h': File exists !!! Error: Unable to create link! postgresql-9.6/libpq-fe.h -> /usr/include/libpq-fe.h exiting >>> Regenerating /etc/ld.so.cache... Packages installed: 1321 Packages in world: 216 Packages in system: 44 Required packages: 1321 Number removed: 1 Looking at /usr/include/ I see this: lrwxrwxrwx 1 root root 29 Jul 16 13:56 postgres_ext.h -> postgresql-9.5/postgres_ext.h lrwxrwxrwx 1 root root 14 Jul 29 10:34 postgresql -> postgresql-9.6 drwxr-xr-x 6 root root 4096 Jul 16 13:55 postgresql-9.6 Although the old /usr/include/postgresql-9.5 directory and file postgres_ext.h have been removed, the symlink is still pointint to the old file, rather than having been replaced with a symlink to /usr/include/postgresql-9.6/postgres_ext.h: $ ls -la /usr/include/postgresql-9.6/postgres_ext.h -rw-r--r-- 1 root root 2151 Jul 16 13:54 /usr/include/postgresql-9.6/postgres_ext.h I'm trying to understand why this might have happened. Which process/action is responsible for setting this symlink? Also, the entry run by depclean above also confused me: Unsetting 9.5 as default...done. Setting 9.6 as the default... How is the default version of postgresql being set in a system? What specific actions do these two entries entail? I thought with openrc at least it is a matter of setting up the latest postgresql version to start up in rc-update. I've replaced the symlink with the live postgresql manually for now - I hope I haven't borked the database ... -- Regards, Mick
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