mariadb-connector-c: fix static build (#147166)

pkgs/servers/sql/mariadb/connector-c/default.nix

@@ -31,6 +31,13 @@ stdenv.mkDerivation {
     substituteInPlace mariadb_config/mariadb_config.c.in \
       --replace '-I%s/@INSTALL_INCLUDEDIR@' "-I$dev/include" \
       --replace '-L%s/@INSTALL_LIBDIR@' "-L$out/lib/mariadb"
+  '' + lib.optionalString stdenv.hostPlatform.isStatic ''
+    # Disables all dynamic plugins
+    substituteInPlace cmake/plugins.cmake \
+      --replace 'if(''${CC_PLUGIN_DEFAULT} STREQUAL "DYNAMIC")' 'if(''${CC_PLUGIN_DEFAULT} STREQUAL "INVALID")'
+    # Force building static libraries
+    substituteInPlace libmariadb/CMakeLists.txt \
+      --replace 'libmariadb SHARED' 'libmariadb STATIC'
   '';
 
   # The cmake setup-hook uses $out/lib by default, this is not the case here.