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: 
tif_getimage.c:2948:13: warning: implicit declaration of function 'TIFFErrorExtR'; did you mean 'TIFFErrorExt'? [-Wimplicit-function-declaration]
 2948 |             TIFFErrorExtR(tif, TIFFFileName(tif),
      |             ^~~~~~~~~~~~~
      |             TIFFErrorExt

This snippet shows that function has not been defined nor declared anywhere which is the reason for undefined reference error later.