PERSISTENCE: check the libpq path that was detected by cmake

src/engine-config.h.in

@@ -21,3 +21,5 @@
 #cmakedefine OPENCL_LIBRARY "@OPENCL_LIBRARY@"
 #cmakedefine BASE_URL "@BASE_URL@"
 #cmakedefine DB_PW "@DB_PW@"
+
+#cmakedefine POSTGRESQL_LIBS "@POSTGRESQL_LIBS@"

src/modules/persistence/CMakeLists.txt

@@ -50,6 +50,7 @@ else()
 	message(WARNING "No postgres was found on your system. Make sure to have libpq and pg_type.h installed on your system")
 endif()
 set(HAVE_POSTGRES ${PostgreSQL_FOUND} CACHE BOOL "Found postgres" FORCE)
+set(POSTGRESQL_LIBS "${PostgreSQL_LIBRARIES}" CACHE STRING "PostgreSQL libraries" FORCE)
 
 message(STATUS "Postgresql include dirs: ${PostgreSQL_INCLUDE_DIRS}")
 message(STATUS "Postgresql libs: ${PostgreSQL_LIBRARIES}")

src/modules/persistence/postgres/PQSymbol.cpp

@@ -67,7 +67,11 @@ bool postgresInit() {
 	}
 
 	if (obj == nullptr) {
-		const char *searchPaths[] = {"libpq.so", nullptr};
+		const char *searchPaths[] = {
+#ifdef POSTGRESQL_LIBS
+				POSTGRESQL_LIBS
+#endif
+				"libpq.so", nullptr};
 		for (const char **searchPath = searchPaths; *searchPath; ++searchPath) {
 			obj = SDL_LoadObject(*searchPath);
 			if (obj != nullptr) {