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@node iswblank
@section @code{iswblank}
@findex iswblank
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/iswblank.html}
Gnulib module: iswblank
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Minix 3.1.8, AIX 4.3.2, IRIX 6.5, OSF/1 5.1, Solaris 9, mingw, MSVC 9.
@item
This function is declared but not defined on some platforms:
IRIX 6.5.30.
@item
This function is not declared (without @code{-D_GNU_SOURCE}) on some platforms:
glibc 2.8.
@item
This function returns 0 for all possible arguments on some platforms:
Linux libc5.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
On AIX and Windows platforms, @code{wchar_t} is a 16-bit type and therefore cannot
accommodate all Unicode characters.
@end itemize
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