gsklog convenient logging methods around the glib mechanism This file provide macros to allow logging to go to selected domains from a single compilation unit. Also, it contains methods to conveniently trap the logs to given files. @domain: @level_mask: @filename: @output_format: @Returns: Log a message at the WARNING priority level. Messages logged at this level can be fatal in debugging mode. @domain: the log-domain to use to categorize the message. Log a message at the WARNING priority level. Messages logged at this level are always fatal. @domain: the log-domain to use to categorize the message. @...: printf-style format and arguments. Log a message at the CRITICAL priority level. Messages logged at this level can be fatal in debugging mode. @domain: the log-domain to use to categorize the message. @...: printf-style format and arguments.