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+@node strerror
+@section @code{strerror}
+@findex strerror
+
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/strerror.html}
+
+Gnulib module: strerror
+
+Portability problems fixed by Gnulib:
+@itemize
+@item
+This function does not support the error values that are specified by POSIX
+but not defined by the system, on some platforms:
+OpenBSD 4.0, OSF/1 5.1, NonStop Kernel, Cygwin 1.5.x, mingw, MSVC 9.
+@item
+This function reports failure for @code{strerror(0)} (by setting
+@code{errno} or using a string similar to out-of-range values),
+although POSIX requires this to leave @code{errno} unchanged and
+report success, on some platforms:
+FreeBSD 8.2, OpenBSD 4.7, MacOS X 10.5.
+@item
+This function fails to return a string for out-of-range integers on
+some platforms:
+HP-UX 11, IRIX 6.5, Solaris 8.
+(Some return NULL which is a POSIX violation, others return the empty
+string which is valid but not as useful); this can still cause bugs
+because most programs call @code{strerror} without setting and testing
+@code{errno}.)
+@end itemize
+
+Portability problems not fixed by Gnulib:
+@itemize
+@end itemize