2 @section @code{isblank}
5 POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/isblank.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function is missing on some platforms:
17 AIX 4.3.2, IRIX 6.5, OSF/1 5.1, Solaris 9, mingw.