@section @code{logb}
@findex logb
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/logb.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/logb.html}
-Gnulib module: ---
+Gnulib module: logb
Portability problems fixed by Gnulib:
@itemize
+@item
+This function is missing on some platforms:
+Minix 3.1.8, MSVC 9.
+@item
+This function is missing a declaration on some platforms:
+Cygwin 1.5.x.
+@item
+This function produces wrong results for subnormal numbers on some platforms:
+glibc 2.11/ppc, glibc 2.7/sparc, glibc 2.7/hppa, Solaris 11 2011-11, Cygwin 1.5.x.
@end itemize
Portability problems not fixed by Gnulib: