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As of Xcode 15 (macOS Sonoma), the linker complains about duplicate references to the same library. We see warnings about libpgport and libpgcommon being duplicated in many client executables. This is a consequence of the hack introduced in commit 6b7ef076b to list libpgport before libpq while not removing it from $(LIBS). (Commit 8396447cd later applied the same rule to libpgcommon.) The concern in 6b7ef076b was to ensure that the client executable wouldn't unintentionally depend on pgport functions from libpq. That concern is obsolete on any platform for which we can do symbol export control, because if we can then the pgport functions in libpq won't be exposed anyway. Hence, we can fix this problem by just removing libpgport and libpgcommon from $(libpq_pgport), and letting clients depend on the occurrences in $(LIBS). In the back branches, do that only on macOS (which we know has symbol export control). In HEAD, let's be more aggressive and remove the extra libraries everywhere. The only still-supported platforms that lack export control are MinGW/Cygwin, and it doesn't seem worth sweating over ABI stability details for those (or if somebody does care, it'd probably be possible to perform symbol export control for those too). As well as being simpler, this might give some microscopic improvement in build time. The meson build system is not changed here, as it doesn't have this particular disease, though it does have some related issues that we'll fix separately. Discussion: https://postgr.es/m/467042.1695766998@sss.pgh.pa.us
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.