On several popular operating systems, we can use relative rpaths, using
the $ORIGIN placeholder, so that the resulting installation is
relocatable. Then we also don't need to set LD_LIBRARY_PATH during make
check.
This implementation will use a relative rpath if bindir and libdir are
under the same common parent directory.
Supported platforms are: freebsd, linux, netbsd, openbsd, solaris
Information from https://lekensteyn.nl/rpath.html
(Yes, something for macOS would be nice, to work around SIP issues, but
I'll leave that as a separate future item.)
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services