text: /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
  /* A GNU-like <signal.h>.
  
     Copyright (C) 2006-2013 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as published by
     the Free Software Foundation; either version 2.1 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #if __GNUC__ >= 3
  #pragma GCC system_header
  #endif
  
  
  #if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
  /* Special invocation convention:
     - Inside glibc header files.
     - On glibc systems we have a sequence of nested includes
       <signal.h> -> <ucontext.h> -> <signal.h>.
       In this situation, the functions are not yet declared, therefore we cannot
       provide the C++ aliases.
     - On glibc systems with GCC 4.3 we have a sequence of nested includes
       <csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
       In this situation, some of the functions are not yet declared, therefore
       we cannot provide the C++ aliases.  */
  
  # include_next <signal.h>
  
  #else
  /* Normal invocation convention.  */
  
  #ifndef _GL_SIGNAL_H
  
  #define _GL_ALREADY_INCLUDING_SIGNAL_H
  
  /* Define pid_t, uid_t.
     Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
     On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
     us; so include <sys/types.h> now, before the second inclusion guard.  */
  #include <sys/types.h>
  
  /* The include_next requires a split double-inclusion guard.  */
  #include_next <signal.h>
  
  #undef _GL_ALREADY_INCLUDING_SIGNAL_H
  
  #ifndef _GL_SIGNAL_H
  #define _GL_SIGNAL_H
  
  /* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6 declare
     pthread_sigmask in <pthread.h>, not in <signal.h>.
     But avoid namespace pollution on glibc systems.*/
  #if (0 || defined GNULIB_POSIXCHECK) \
      && ((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ || defined __sun) \
      && ! defined __GLIBC__
  # include <pthread.h>
  #endif
  
  /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  #ifndef _GL_CXXDEFS_H
  #define _GL_CXXDEFS_H
  
  /* The three most frequent use cases of these macros are:
  
     * For providing a substitute for a function that is missing on some
       platforms, but is declared and works fine on the platforms on which
       it exists:
  
         #if @GNULIB_FOO@
         # if !@HAVE_FOO@
         _GL_FUNCDECL_SYS (foo, ...);
         # endif
         _GL_CXXALIAS_SYS (foo, ...);
         _GL_CXXALIASWARN (foo);
         #elif defined GNULIB_POSIXCHECK
         ...
         #endif
  
     * For providing a replacement for a function that exists on all platforms,
       but is broken/insufficient and needs to be replaced on some platforms:
  
         #if @GNULIB_FOO@
         # if @REPLACE_FOO@
         #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
         #   undef foo
         #   define foo rpl_foo
         #  endif
         _GL_FUNCDECL_RPL (foo, ...);
         _GL_CXXALIAS_RPL (foo, ...);
         # else
         _GL_CXXALIAS_SYS (foo, ...);
         # endif
         _GL_CXXALIASWARN (foo);
         #elif defined GNULIB_POSIXCHECK
         ...
         #endif
  
     * For providing a replacement for a function that exists on some platforms
       but is broken/insufficient and needs to be replaced on some of them and
       is additionally either missing or undeclared on some other platforms:
  
         #if @GNULIB_FOO@
         # if @REPLACE_FOO@
         #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
         #   undef foo
         #   define foo rpl_foo
         #  endif
         _GL_FUNCDECL_RPL (foo, ...);
         _GL_CXXALIAS_RPL (foo, ...);
         # else
         #  if !@HAVE_FOO@   or   if !@HAVE_DECL_FOO@
         _GL_FUNCDECL_SYS (foo, ...);
         #  endif
         _GL_CXXALIAS_SYS (foo, ...);
         # endif
         _GL_CXXALIASWARN (foo);
         #elif defined GNULIB_POSIXCHECK
         ...
         #endif
  */
  
  /* _GL_EXTERN_C declaration;
     performs the declaration with C linkage.  */
  #if defined __cplusplus
  # define _GL_EXTERN_C extern "C"
  #else
  # define _GL_EXTERN_C extern
  #endif
  
  /* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes);
     declares a replacement function, named rpl_func, with the given prototype,
     consisting of return type, parameters, and attributes.
     Example:
       _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
                                    _GL_ARG_NONNULL ((1)));
   */
  #define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \
    _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes)
  #define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \
    _GL_EXTERN_C rettype rpl_func parameters_and_attributes
  
  /* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes);
     declares the system function, named func, with the given prototype,
     consisting of return type, parameters, and attributes.
     Example:
       _GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...)
                                    _GL_ARG_NONNULL ((1)));
   */
  #define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \
    _GL_EXTERN_C rettype func parameters_and_attributes
  
  /* _GL_CXXALIAS_RPL (func, rettype, parameters);
     declares a C++ alias called GNULIB_NAMESPACE::func
     that redirects to rpl_func, if GNULIB_NAMESPACE is defined.
     Example:
       _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
   */
  #define _GL_CXXALIAS_RPL(func,rettype,parameters) \
    _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
  #if defined __cplusplus && defined GNULIB_NAMESPACE
  # define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
      namespace GNULIB_NAMESPACE                                \
      {                                                         \
        rettype (*const func) parameters = ::rpl_func;          \
      }                                                         \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #else
  # define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #endif
  
  /* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters);
     is like  _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters);
     except that the C function rpl_func may have a slightly different
     declaration.  A cast is used to silence the "invalid conversion" error
     that would otherwise occur.  */
  #if defined __cplusplus && defined GNULIB_NAMESPACE
  # define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
      namespace GNULIB_NAMESPACE                                     \
      {                                                              \
        rettype (*const func) parameters =                           \
          reinterpret_cast<rettype(*)parameters>(::rpl_func);        \
      }                                                              \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #else
  # define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #endif
  
  /* _GL_CXXALIAS_SYS (func, rettype, parameters);
     declares a C++ alias called GNULIB_NAMESPACE::func
     that redirects to the system provided function func, if GNULIB_NAMESPACE
     is defined.
     Example:
       _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
   */
  #if defined __cplusplus && defined GNULIB_NAMESPACE
    /* If we were to write
         rettype (*const func) parameters = ::func;
       like above in _GL_CXXALIAS_RPL_1, the compiler could optimize calls
       better (remove an indirection through a 'static' pointer variable),
       but then the _GL_CXXALIASWARN macro below would cause a warning not only
       for uses of ::func but also for uses of GNULIB_NAMESPACE::func.  */
  # define _GL_CXXALIAS_SYS(func,rettype,parameters) \
      namespace GNULIB_NAMESPACE                     \
      {                                              \
        static rettype (*func) parameters = ::func;  \
      }                                              \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #else
  # define _GL_CXXALIAS_SYS(func,rettype,parameters) \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #endif
  
  /* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters);
     is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
     except that the C function func may have a slightly different declaration.
     A cast is used to silence the "invalid conversion" error that would
     otherwise occur.  */
  #if defined __cplusplus && defined GNULIB_NAMESPACE
  # define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
      namespace GNULIB_NAMESPACE                          \
      {                                                   \
        static rettype (*func) parameters =               \
          reinterpret_cast<rettype(*)parameters>(::func); \
      }                                                   \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #else
  # define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #endif
  
  /* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2);
     is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
     except that the C function is picked among a set of overloaded functions,
     namely the one with rettype2 and parameters2.  Two consecutive casts
     are used to silence the "cannot find a match" and "invalid conversion"
     errors that would otherwise occur.  */
  #if defined __cplusplus && defined GNULIB_NAMESPACE
    /* The outer cast must be a reinterpret_cast.
       The inner cast: When the function is defined as a set of overloaded
       functions, it works as a static_cast<>, choosing the designated variant.
       When the function is defined as a single variant, it works as a
       reinterpret_cast<>. The parenthesized cast syntax works both ways.  */
  # define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
      namespace GNULIB_NAMESPACE                                                \
      {                                                                         \
        static rettype (*func) parameters =                                     \
          reinterpret_cast<rettype(*)parameters>(                               \
            (rettype2(*)parameters2)(::func));                                  \
      }                                                                         \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #else
  # define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #endif
  
  /* _GL_CXXALIASWARN (func);
     causes a warning to be emitted when ::func is used but not when
     GNULIB_NAMESPACE::func is used.  func must be defined without overloaded
     variants.  */
  #if defined __cplusplus && defined GNULIB_NAMESPACE
  # define _GL_CXXALIASWARN(func) \
     _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE)
  # define _GL_CXXALIASWARN_1(func,namespace) \
     _GL_CXXALIASWARN_2 (func, namespace)
  /* To work around GCC bug <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
     we enable the warning only when not optimizing.  */
  # if !__OPTIMIZE__
  #  define _GL_CXXALIASWARN_2(func,namespace) \
      _GL_WARN_ON_USE (func, \
                       "The symbol ::" #func " refers to the system function. " \
                       "Use " #namespace "::" #func " instead.")
  # elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
  #  define _GL_CXXALIASWARN_2(func,namespace) \
       extern __typeof__ (func) func
  # else
  #  define _GL_CXXALIASWARN_2(func,namespace) \
       _GL_EXTERN_C int _gl_cxxalias_dummy
  # endif
  #else
  # define _GL_CXXALIASWARN(func) \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #endif
  
  /* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes);
     causes a warning to be emitted when the given overloaded variant of ::func
     is used but not when GNULIB_NAMESPACE::func is used.  */
  #if defined __cplusplus && defined GNULIB_NAMESPACE
  # define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
     _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \
                          GNULIB_NAMESPACE)
  # define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \
     _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace)
  /* To work around GCC bug <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
     we enable the warning only when not optimizing.  */
  # if !__OPTIMIZE__
  #  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
      _GL_WARN_ON_USE_CXX (func, rettype, parameters_and_attributes, \
                           "The symbol ::" #func " refers to the system function. " \
                           "Use " #namespace "::" #func " instead.")
  # elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
  #  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
       extern __typeof__ (func) func
  # else
  #  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
       _GL_EXTERN_C int _gl_cxxalias_dummy
  # endif
  #else
  # define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
      _GL_EXTERN_C int _gl_cxxalias_dummy
  #endif
  
  #endif /* _GL_CXXDEFS_H */
  
  /* The definition of _GL_ARG_NONNULL is copied here.  */
  /* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
     that the values passed as arguments n, ..., m must be non-NULL pointers.
     n = 1 stands for the first argument, n = 2 for the second argument etc.  */
  #ifndef _GL_ARG_NONNULL
  # if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || __GNUC__ > 3
  #  define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
  # else
  #  define _GL_ARG_NONNULL(params)
  # endif
  #endif
  
  /* The definition of _GL_WARN_ON_USE is copied here.  */
  #ifndef _GL_WARN_ON_USE
  
  # if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
  /* A compiler attribute is available in gcc versions 4.3.0 and later.  */
  #  define _GL_WARN_ON_USE(function, message) \
  extern __typeof__ (function) function __attribute__ ((__warning__ (message)))
  # elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
  /* Verify the existence of the function.  */
  #  define _GL_WARN_ON_USE(function, message) \
  extern __typeof__ (function) function
  # else /* Unsupported.  */
  #  define _GL_WARN_ON_USE(function, message) \
  _GL_WARN_EXTERN_C int _gl_warn_on_use
  # endif
  #endif
  
  /* _GL_WARN_ON_USE_CXX (function, rettype, parameters_and_attributes, "string")
     is like _GL_WARN_ON_USE (function, "string"), except that the function is
     declared with the given prototype, consisting of return type, parameters,
     and attributes.
     This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does
     not work in this case.  */
  #ifndef _GL_WARN_ON_USE_CXX
  # if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
  #  define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \
  extern rettype function parameters_and_attributes \
       __attribute__ ((__warning__ (msg)))
  # elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
  /* Verify the existence of the function.  */
  #  define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \
  extern rettype function parameters_and_attributes
  # else /* Unsupported.  */
  #  define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \
  _GL_WARN_EXTERN_C int _gl_warn_on_use
  # endif
  #endif
  
  /* _GL_WARN_EXTERN_C declaration;
     performs the declaration with C linkage.  */
  #ifndef _GL_WARN_EXTERN_C
  # if defined __cplusplus
  #  define _GL_WARN_EXTERN_C extern "C"
  # else
  #  define _GL_WARN_EXTERN_C extern
  # endif
  #endif
  
  /* On AIX, sig_atomic_t already includes volatile.  C99 requires that
     'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
     Hence, redefine this to a non-volatile type as needed.  */
  #if ! 1
  # if !GNULIB_defined_sig_atomic_t
  typedef int rpl_sig_atomic_t;
  #  undef sig_atomic_t
  #  define sig_atomic_t rpl_sig_atomic_t
  #  define GNULIB_defined_sig_atomic_t 1
  # endif
  #endif
  
  /* A set or mask of signals.  */
  #if !1
  # if !GNULIB_defined_sigset_t
  typedef unsigned int sigset_t;
  #  define GNULIB_defined_sigset_t 1
  # endif
  #endif
  
  /* Define sighandler_t, the type of signal handlers.  A GNU extension.  */
  #if !0
  # ifdef __cplusplus
  extern "C" {
  # endif
  # if !GNULIB_defined_sighandler_t
  typedef void (*sighandler_t) (int);
  #  define GNULIB_defined_sighandler_t 1
  # endif
  # ifdef __cplusplus
  }
  # endif
  #endif
  
  
  #if 0
  # ifndef SIGPIPE
  /* Define SIGPIPE to a value that does not overlap with other signals.  */
  #  define SIGPIPE 13
  #  define GNULIB_defined_SIGPIPE 1
  /* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
     'write', 'stdio'.  */
  # endif
  #endif
  
  
  /* Maximum signal number + 1.  */
  #ifndef NSIG
  # if defined __TANDEM
  #  define NSIG 32
  # endif
  #endif
  
  
  #if 0
  # if 0
  #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
  #   undef pthread_sigmask
  #   define pthread_sigmask rpl_pthread_sigmask
  #  endif
  _GL_FUNCDECL_RPL (pthread_sigmask, int,
                    (int how, const sigset_t *new_mask, sigset_t *old_mask));
  _GL_CXXALIAS_RPL (pthread_sigmask, int,
                    (int how, const sigset_t *new_mask, sigset_t *old_mask));
  # else
  #  if !1
  _GL_FUNCDECL_SYS (pthread_sigmask, int,
                    (int how, const sigset_t *new_mask, sigset_t *old_mask));
  #  endif
  _GL_CXXALIAS_SYS (pthread_sigmask, int,
                    (int how, const sigset_t *new_mask, sigset_t *old_mask));
  # endif
  _GL_CXXALIASWARN (pthread_sigmask);
  #elif defined GNULIB_POSIXCHECK
  # undef pthread_sigmask
  # if HAVE_RAW_DECL_PTHREAD_SIGMASK
  _GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
                   "use gnulib module pthread_sigmask for portability");
  # endif
  #endif
  
  
  #if 0
  # if 0
  #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
  #   undef raise
  #   define raise rpl_raise
  #  endif
  _GL_FUNCDECL_RPL (raise, int, (int sig));
  _GL_CXXALIAS_RPL (raise, int, (int sig));
  # else
  #  if !1
  _GL_FUNCDECL_SYS (raise, int, (int sig));
  #  endif
  _GL_CXXALIAS_SYS (raise, int, (int sig));
  # endif
  _GL_CXXALIASWARN (raise);
  #elif defined GNULIB_POSIXCHECK
  # undef raise
  /* Assume raise is always declared.  */
  _GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
                   "use gnulib module raise for portability");
  #endif
  
  
  #if 0
  # if !1
  
  #  ifndef GNULIB_defined_signal_blocking
  #   define GNULIB_defined_signal_blocking 1
  #  endif
  
  /* Maximum signal number + 1.  */
  #  ifndef NSIG
  #   define NSIG 32
  #  endif
  
  /* This code supports only 32 signals.  */
  #  if !GNULIB_defined_verify_NSIG_constraint
  typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
  #   define GNULIB_defined_verify_NSIG_constraint 1
  #  endif
  
  # endif
  
  /* When also using extern inline, suppress the use of static inline in
     standard headers of problematic Apple configurations, as Libc at
     least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
     <http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>.
     Perhaps Apple will fix this some day.  */
  #if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
       && (defined __i386__ || defined __x86_64__))
  # undef sigaddset
  # undef sigdelset
  # undef sigemptyset
  # undef sigfillset
  # undef sigismember
  #endif
  
  /* Test whether a given signal is contained in a signal set.  */
  # if 1
  /* This function is defined as a macro on Mac OS X.  */
  #  if defined __cplusplus && defined GNULIB_NAMESPACE
  #   undef sigismember
  #  endif
  # else
  _GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
                                      _GL_ARG_NONNULL ((1)));
  # endif
  _GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
  _GL_CXXALIASWARN (sigismember);
  
  /* Initialize a signal set to the empty set.  */
  # if 1
  /* This function is defined as a macro on Mac OS X.  */
  #  if defined __cplusplus && defined GNULIB_NAMESPACE
  #   undef sigemptyset
  #  endif
  # else
  _GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
  # endif
  _GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
  _GL_CXXALIASWARN (sigemptyset);
  
  /* Add a signal to a signal set.  */
  # if 1
  /* This function is defined as a macro on Mac OS X.  */
  #  if defined __cplusplus && defined GNULIB_NAMESPACE
  #   undef sigaddset
  #  endif
  # else
  _GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
                                    _GL_ARG_NONNULL ((1)));
  # endif
  _GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
  _GL_CXXALIASWARN (sigaddset);
  
  /* Remove a signal from a signal set.  */
  # if 1
  /* This function is defined as a macro on Mac OS X.  */
  #  if defined __cplusplus && defined GNULIB_NAMESPACE
  #   undef sigdelset
  #  endif
  # else
  _GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
                                    _GL_ARG_NONNULL ((1)));
  # endif
  _GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
  _GL_CXXALIASWARN (sigdelset);
  
  /* Fill a signal set with all possible signals.  */
  # if 1
  /* This function is defined as a macro on Mac OS X.  */
  #  if defined __cplusplus && defined GNULIB_NAMESPACE
  #   undef sigfillset
  #  endif
  # else
  _GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
  # endif
  _GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
  _GL_CXXALIASWARN (sigfillset);
  
  /* Return the set of those blocked signals that are pending.  */
  # if !1
  _GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
  # endif
  _GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
  _GL_CXXALIASWARN (sigpending);
  
  /* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
     Then, if SET is not NULL, affect the current set of blocked signals by
     combining it with *SET as indicated in OPERATION.
     In this implementation, you are not allowed to change a signal handler
     while the signal is blocked.  */
  # if !1
  #  define SIG_BLOCK   0  /* blocked_set = blocked_set | *set; */
  #  define SIG_SETMASK 1  /* blocked_set = *set; */
  #  define SIG_UNBLOCK 2  /* blocked_set = blocked_set & ~*set; */
  _GL_FUNCDECL_SYS (sigprocmask, int,
                    (int operation, const sigset_t *set, sigset_t *old_set));
  # endif
  _GL_CXXALIAS_SYS (sigprocmask, int,
                    (int operation, const sigset_t *set, sigset_t *old_set));
  _GL_CXXALIASWARN (sigprocmask);
  
  /* Install the handler FUNC for signal SIG, and return the previous
     handler.  */
  # ifdef __cplusplus
  extern "C" {
  # endif
  # if !GNULIB_defined_function_taking_int_returning_void_t
  typedef void (*_gl_function_taking_int_returning_void_t) (int);
  #  define GNULIB_defined_function_taking_int_returning_void_t 1
  # endif
  # ifdef __cplusplus
  }
  # endif
  # if !1
  #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
  #   define signal rpl_signal
  #  endif
  _GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
                    (int sig, _gl_function_taking_int_returning_void_t func));
  _GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
                    (int sig, _gl_function_taking_int_returning_void_t func));
  # else
  _GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
                    (int sig, _gl_function_taking_int_returning_void_t func));
  # endif
  _GL_CXXALIASWARN (signal);
  
  # if !1 && GNULIB_defined_SIGPIPE
  /* Raise signal SIGPIPE.  */
  _GL_EXTERN_C int _gl_raise_SIGPIPE (void);
  # endif
  
  #elif defined GNULIB_POSIXCHECK
  # undef sigaddset
  # if HAVE_RAW_DECL_SIGADDSET
  _GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
                   "use the gnulib module sigprocmask for portability");
  # endif
  # undef sigdelset
  # if HAVE_RAW_DECL_SIGDELSET
  _GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
                   "use the gnulib module sigprocmask for portability");
  # endif
  # undef sigemptyset
  # if HAVE_RAW_DECL_SIGEMPTYSET
  _GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
                   "use the gnulib module sigprocmask for portability");
  # endif
  # undef sigfillset
  # if HAVE_RAW_DECL_SIGFILLSET
  _GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
                   "use the gnulib module sigprocmask for portability");
  # endif
  # undef sigismember
  # if HAVE_RAW_DECL_SIGISMEMBER
  _GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
                   "use the gnulib module sigprocmask for portability");
  # endif
  # undef sigpending
  # if HAVE_RAW_DECL_SIGPENDING
  _GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
                   "use the gnulib module sigprocmask for portability");
  # endif
  # undef sigprocmask
  # if HAVE_RAW_DECL_SIGPROCMASK
  _GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
                   "use the gnulib module sigprocmask for portability");
  # endif
  #endif /* 0 */
  
  
  #if 0
  # if !1
  
  #  if !1
  
  #   if !GNULIB_defined_siginfo_types
  
  /* Present to allow compilation, but unsupported by gnulib.  */
  union sigval
  {
    int sival_int;
    void *sival_ptr;
  };
  
  /* Present to allow compilation, but unsupported by gnulib.  */
  struct siginfo_t
  {
    int si_signo;
    int si_code;
    int si_errno;
    pid_t si_pid;
    uid_t si_uid;
    void *si_addr;
    int si_status;
    long si_band;
    union sigval si_value;
  };
  typedef struct siginfo_t siginfo_t;
  
  #    define GNULIB_defined_siginfo_types 1
  #   endif
  
  #  endif /* !1 */
  
  /* We assume that platforms which lack the sigaction() function also lack
     the 'struct sigaction' type, and vice versa.  */
  
  #  if !GNULIB_defined_struct_sigaction
  
  struct sigaction
  {
    union
    {
      void (*_sa_handler) (int);
      /* Present to allow compilation, but unsupported by gnulib.  POSIX
         says that implementations may, but not must, make sa_sigaction
         overlap with sa_handler, but we know of no implementation where
         they do not overlap.  */
      void (*_sa_sigaction) (int, siginfo_t *, void *);
    } _sa_func;
    sigset_t sa_mask;
    /* Not all POSIX flags are supported.  */
    int sa_flags;
  };
  #   define sa_handler _sa_func._sa_handler
  #   define sa_sigaction _sa_func._sa_sigaction
  /* Unsupported flags are not present.  */
  #   define SA_RESETHAND 1
  #   define SA_NODEFER 2
  #   define SA_RESTART 4
  
  #   define GNULIB_defined_struct_sigaction 1
  #  endif
  
  _GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
                                     struct sigaction *restrict));
  
  # elif !1
  
  #  define sa_sigaction sa_handler
  
  # endif /* !1, !1 */
  
  _GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
                                     struct sigaction *restrict));
  _GL_CXXALIASWARN (sigaction);
  
  #elif defined GNULIB_POSIXCHECK
  # undef sigaction
  # if HAVE_RAW_DECL_SIGACTION
  _GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
                   "use the gnulib module sigaction for portability");
  # endif
  #endif
  
  /* Some systems don't have SA_NODEFER.  */
  #ifndef SA_NODEFER
  # define SA_NODEFER 0
  #endif
  
  
  #endif /* _GL_SIGNAL_H */
  #endif /* _GL_SIGNAL_H */
  #endif
  