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:

  [src/spss/readstat_por_write.c: In function 'por_emit_header':
src/spss/readstat_por_write.c:206:5: error: 'strncpy' output may be truncated copying 20 bytes from a string of length 256 [-Werror=stringop-truncation]
  206 |     strncpy(vanity[1] + 20, writer->file_label, 20);
      |     ^
cc1: all warnings being treated as errors]: [This snippet shows the GCC error which causes the build failure.]

Issue: The build has failed because of a GCC error.
Resolution: Preferably, work with the upstream code to produce a patch fixing the GCC error or add the appropriate CFLAGS to treat this error only as a warning.