Found the following significant warnings:
  readstat/readstat_writer.c:261:5: warning: ‘strncpy’ specified bound 256 equals destination size [-Wstringop-truncation]
  readstat/readstat_writer.c:82:9: warning: ‘strncpy’ output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
  readstat/readstat_writer.c:316:9: warning: ‘strncpy’ output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
  readstat/sas/readstat_xport_write.c:16:5: warning: ‘strncpy’ output may be truncated copying 8 bytes from a string of length 299 [-Wstringop-truncation]
  readstat/sas/readstat_xport_write.c:16:5: warning: ‘strncpy’ output may be truncated copying 40 bytes from a string of length 1023 [-Wstringop-truncation]
  readstat/sas/readstat_xport_write.c:16:5: warning: ‘strncpy’ output may be truncated copying 8 bytes from a string of length 23 [-Wstringop-truncation]
  readstat/sas/readstat_xport_write.c:16:5: warning: ‘strncpy’ output may be truncated copying 32 bytes from a string of length 299 [-Wstringop-truncation]
  readstat/sas/readstat_sas7bcat_write.c:108:5: warning: ‘strncpy’ output may be truncated copying 64 bytes from a string of length 99 [-Wstringop-truncation]
  readstat/sas/readstat_sas.c:284:5: warning: ‘strncpy’ output may be truncated copying 64 bytes from a string of length 99 [-Wstringop-truncation]
  readstat/sas/readstat_sas.c:337:5: warning: ‘strncpy’ output may be truncated copying 8 bytes from a string of length 31 [-Wstringop-truncation]
  readstat/spss/readstat_sav_write.c:150:5: warning: ‘strncpy’ output may be truncated copying 9 bytes from a string of length 9 [-Wstringop-truncation]
  readstat/spss/readstat_sav_write.c:158:5: warning: ‘strncpy’ output may be truncated copying 8 bytes from a string of length 8 [-Wstringop-truncation]
  readstat/spss/readstat_por_write.c:194:5: warning: ‘strncpy’ output truncated before terminating nul copying 20 bytes from a string of the same length [-Wstringop-truncation]
See ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/haven.Rcheck/00install.out’ for details.