Found the following significant warnings:
  Rreadsdpa.c:496:5: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:504:3: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:528:3: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:540:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:549:3: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:554:55: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:560:5: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:602:54: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:607:5: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
  Rreadsdpa.c:1028:7: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]
  /usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: warning: ‘__builtin_strncpy’ output may be truncated copying 39 bytes from a string of length 39 [-Wstringop-truncation]
  /usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: warning: ‘__builtin_strncpy’ output may be truncated copying 3999 bytes from a string of length 3999 [-Wstringop-truncation]
  dsdpsetoptions.c:164:4: warning: ‘strncpy’ output may be truncated copying 39 bytes from a string of length 39 [-Wstringop-truncation]
  dsdpsetoptions.c:165:4: warning: ‘strncpy’ output may be truncated copying 39 bytes from a string of length 39 [-Wstringop-truncation]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/Rdsdp.Rcheck/00install.out’ for details.