Re: Can we avoid chdir'ing in resolve_symlinks() ?

On 13.09.22 17:16, Tom Lane wrote:
> Peter Eisentraut <peter.eisentraut@enterprisedb.com> writes:
>> 2) You configure and install with prefix=/usr/local/pgsql-14, and then
>> symlink /usr/local/pgsql -> /usr/local/pgsql-14; hoping that you can
>> then use /usr/local/pgsql as if that's where it actually is.  We don't
>> currently support that.  (Note that it would work if you made a copy of
>> the tree instead of using the symlink.)
> 
> What about it does not work?

The problem is if another package or extension uses pg_config to find, 
say, libdir, includedir, or bindir and integrates it into its own build 
system or its own build products.  If those directories point to 
/usr/local/pgsql/{bin,include,lib}, then there is no problem.  But if 
they point to /usr/local/pgsql-14.5/{bin,include,lib}, then the next 
minor update will break those other packages.