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: