5.16.1 C99 Support (--c99)

The compiler supports the 1999 standard of C as standardized by the ISO. However, the following list of run-time functions and features are not implemented or fully supported:

• complex.h
• ctype.h
  • isblank()
• inttypes.h
  • wcstoimax() / wcstoumax()
• stdarg.h
  • va_copy macro
• stdio.h
  • %a and %A format specifiers for hexadecimal float
  • The %e specifier may produce "-0" when "0" is expected by the standard
  • snprintf() does not properly pad with spaces when writing to a wide character array
• stdlib.h
  • strtof() atof() / strtod() / strtold() do not support hexadecimal float strings
  • vfscanf() / vscanf() / vsscanf() return value on floating point matching failure is incorrect
• tgmath.h
• time.h
  • strftime()
• wchar.h
  • getws() / fputws()
  • mbrlen()
  • mbsrtowcs()
  • wcscat()
  • wcschr()
  • wcscmp() / wcsncmp()
  • wcscpy() / wcsncpy()
  • wcsftime()
  • wcsrtombs()
  • wcsstr()
  • wcstok()
  • wcsxfrm()
  • Wide character print / scan functions
  • Wide character conversion functions