configure: WARNING: --enable-widec is deprecated, wide-character/UTF-8 is always enabled
../source_subfolder/src/chartype.c: In function ‘ct_encode_char’:
../source_subfolder/src/chartype.c:206:3: warning: ignoring return value of ‘wctomb’, declared with attribute warn_unused_result [-Wunused-result]
   wctomb(NULL, L'\0');
   ^
../source_subfolder/src/vi.c: In function ‘vi_histedit’:
../source_subfolder/src/vi.c:1033:2: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
  write(fd, cp, len);
  ^
../source_subfolder/src/vi.c:1034:2: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
  write(fd, "\n", (size_t)1);
  ^
../source_subfolder/src/readline.c: In function ‘history_truncate_file’:
../source_subfolder/src/readline.c:1340:3: warning: ignoring return value of ‘ftruncate’, declared with attribute warn_unused_result [-Wunused-result]
   (void)ftruncate(fileno(fp), off);
   ^
ar: `u' modifier ignored since `D' is the default (see `U')
../source_subfolder/examples/wtc1.c: In function ‘complete’:
../source_subfolder/examples/wtc1.c:74:2: warning: ignoring return value of ‘wctomb’, declared with attribute warn_unused_result [-Wunused-result]
  wctomb(NULL, 0); /* Reset shift state */
  ^
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY