option to specify dis(activation) of compiler optimizations.

If option is specified, it will be honored independant of the
--(dis|en)able-debug option.

option to specify dis(activation) of picky compiler warnings.

If option is specified, it will be honored independant of the
--(dis|en)able-debug option.

If option is not specified, it will follow --(dis|en)able-debug
setting, whose default is disabled if not specified.

otherwise gethostbyname() is not detected.

  Disable floating point optimizations

inet_pton function is available.

inet_ntop function is available.

  Disable remark #279: controlling expression is constant

      Remark triggered mostly on va_arg() and FD_ZERO() macros.

check for winsock build target configurations

and HAVE_STRNCASECMP.

  Disable remark #981: operands are evaluated in unspecified order

      Function calls which are triggering this remark, today, do not depend
      on the order of evaluation of its arguments.

  Disable remark #1469: "cc" clobber ignored

      Remark triggered on htons() and ntohs() due to glibc header files.

we select ANSI C89 dialect plus GNU extensions.

that lacks the writev function.

lacks the strcasecmp function.

  strcasecmp()
  strcmpi()
  stricmp()
  strncasecmp()
  strncmpi()
  strnicmp()