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68c1d7d42e
Some versions of Perl export a macro named HS_KEY. This creates a conflict in contrib/hstore_plperl against hstore's macro of the same name. The most future-proof solution seems to be to rename our macro; I chose HSTORE_KEY. For consistency, rename HS_VAL and related macros similarly. Back-patch to 9.5. contrib/hstore_plperl doesn't exist before that so there is no need to worry about the conflict in older releases. Per reports from Marco Atzeri and Mike Blackwell.
The PostgreSQL contrib tree
---------------------------
This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree. This does not preclude their
usefulness.
User documentation for each module appears in the main SGML
documentation.
When building from the source distribution, these modules are not
built automatically, unless you build the "world" target. You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.
Some directories supply new user-defined functions, operators, or
types. To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command. In a fresh database,
you can simply do
CREATE EXTENSION module_name;
See the PostgreSQL documentation for more information about this
procedure.