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: 
pgtcl.c:88:50: error: ‘Pg_select’ undeclared (first use in this function)
   88 |                                                  Pg_select,
      |                                                  ^~~~~~~~~
pgtcl.c:94:50: error: ‘Pg_result’ undeclared (first use in this function); did you mean ‘pg_result’?
   94 |                                                  Pg_result,
      |                                                  ^~~~~~~~~
      |                                                  pg_result
detailed compilation error