signal.h
========

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html

Gnulib module: signal

Portability problems fixed by Gnulib:

  * volatile sig_atomic_t is rejected by older compilers on some platforms: AIX.

  * sigset_t is missing on some platforms: MSVC 9.

  * sigset_t is only declared in <sys/types.h> on some platforms: mingw.

  * struct sigaction and siginfo_t are missing on some platforms: mingw, MSVC 9.

  * struct sigaction lacks the sa_sigaction member on some platforms: Irix 5.3, Interix 3.5.

  * The type pid_t is not defined on some platforms: MSVC 9.

  * The signal SIGPIPE is not defined on some platforms: mingw, MSVC 9.

  * The macro SA_NODEFER is not defined on some platforms: Interix 3.5.

  * The macros SA_RESETHAND and SA_RESTART are not defined on some platforms: NonStop.

  * The type sighandler_t (a GNU extension) is not defined on most non-glibc platforms: MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin, mingw, MSVC 9, Interix 3.5, BeOS.

Portability problems not fixed by Gnulib:

  * Many signals are not defined on some platforms: mingw, MSVC 9.

  * The macros SIGRTMIN and SIGRTMAX expand to an expression of type long instead of int on some platforms: OSF/1 5.1.

  * The macro SIGBUS is set to the same value as SIGSEGV, rather than being a distinct signal, on some platforms: Haiku.