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: 
gmake: *** [Makefile:159: all] Error 2
Program `gmake` exited with code 2, indicating error. This happened while working on target `all` in the file `Makefile` on line 159.