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34f9944c20
To avoid the sorts of problems complained of by Jakob Egger, it'd be best if configure didn't emit any references to the sysroot path at all. In the case of PL/Tcl, we can do that just by keeping our hands off the TCL_INCLUDE_SPEC string altogether. In the case of PL/Perl, we need to substitute -iwithsysroot for -I in the compile commands, which is easily handled if we change to using a configure output variable that includes the switch not only the directory name. Since PL/Tcl and PL/Python already do it like that, this seems like good consistency cleanup anyway. Hence, this replaces the advice given to Perl-related extensions in commit 5e2217131; instead of writing "-I$(perl_archlibexp)/CORE", they should just write "$(perl_includespec)". (The old way continues to work, but not on recent macOS.) It's still the case that configure needs to be aware of the sysroot path internally, but that's cleaner than what we had before. As before, back-patch to all supported versions. Discussion: https://postgr.es/m/20840.1537850987@sss.pgh.pa.us
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.