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The current setup assumes that commands for lz4, zstd and gzip always exist by default if not enforced by a user's environment. However, vcpkg, as one example, installs libraries but no binaries, so this default setup to assume that a command should always be present would cause failures. This commit improves the detection of such external commands as follows: * If a ENV value is available, trust the environment/user and use it. * If a ENV value is not available, check its execution by looking in the current PATH, by launching a simple "$command --version" (that should be portable enough). ** On execution failure, ignore ENV{command}. ** On execution success, set ENV{command} = "$command". Note that this new rule applies to gzip, lz4 and zstd but not tar that we assume will always exist. Those commands are set up in the environment only when using bincheck and taptest. The CI includes all those commands and I have checked that their setup is correct there. I have also tested this change in a MSVC environment where we have none of those commands. While on it, remove the references to lz4 from the documentation and vcregress.pl in ~v13. --with-lz4 has been added in v14~ so there is no point to have this information in these older branches. Reported-by: Andrew Dunstan Reviewed-by: Andrew Dunstan Discussion: https://postgr.es/m/14402151-376b-a57a-6d0c-10ad12608e12@dunslane.net Backpatch-through: 10 |
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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/.