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: 
RPM build warnings:

RPM build errors:
    Macro expanded in comment on line 1499: %{_datadir}/%{majorname}/errmsg-utf8.txt
RPMbuild warning.

The RPMbuild expands macros everywhere in the SPECfile, even in the changelog and comments.
prepend all macros you wan't to prevent expanding with extra %.
e.g.: "%{_datadir}" will expand
"%%{_datadir}" will not expand.