Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [compress.c: In function 'uncompresszlib':
compress.c:622:9: error: 'rc' undeclared (first use in this function)
  622 |         rc;
      |         ^~
compress.c:622:9: note: each undeclared identifier is reported only once for each function it appears in
make[3]: *** [Makefile:579: compress.lo] Error 1]: [This is a compilation error. The variable rc from the file compress.c on line 622 has no declared type on its first use in the function.]

Issue: Build failed because the package was unable to compile.
Resolution: Declare a type of the variable.