2 @subsection @code{sigreturn}
7 Portability problems fixed by Gnulib:
11 Portability problems not fixed by Gnulib:
14 This function is missing on some platforms:
15 AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11 2010-11, Cygwin, mingw, MSVC 9, Interix 3.5, BeOS.