Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
../../src.x11/xcmds.c:2059:6: warning: old-style function definition [-Wold-style-definition]
 2059 | void UpdateXCMDS ( state )
      |      ^~~~~~~~~~~
make: *** [Makefile:47: compile] Error 2
Warning about old-style code.