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Newest versions of gcc+glibc are able to detect cases where code implicitly casts away const by assigning the result of strchr() or a similar function applied to a "const char *" value to a target variable that's just "char *". This of course creates a hazard of not getting a compiler warning about scribbling on a string one was not supposed to, so fixing up such cases is good. This patch fixes a dozen or so places where we were doing that. Most are trivial additions of "const" to the target variable, since no actually-hazardous change was occurring. Thanks to Bertrand Drouvot for finding a couple more spots than I had. This commit back-patches relevant portions of 8f1791c61 and 9f7565c6c into supported branches. However, there are two places in ecpg (in v18 only) where a proper fix is more complicated than seems appropriate for a back-patch. I opted to silence those two warnings by adding casts. Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Discussion: https://postgr.es/m/1324889.1764886170@sss.pgh.pa.us Discussion: https://postgr.es/m/3988414.1771950285@sss.pgh.pa.us Backpatch-through: 14-18
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/.