| # signal_h.m4 serial 18 |
| dnl Copyright (C) 2007-2016 Free Software Foundation, Inc. |
| dnl This file is free software; the Free Software Foundation |
| dnl gives unlimited permission to copy and/or distribute it, |
| dnl with or without modifications, as long as this notice is preserved. |
| |
| AC_DEFUN([gl_SIGNAL_H], |
| [ |
| AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) |
| AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T]) |
| gl_NEXT_HEADERS([signal.h]) |
| |
| # AIX declares sig_atomic_t to already include volatile, and C89 compilers |
| # then choke on 'volatile sig_atomic_t'. C99 requires that it compile. |
| AC_CHECK_TYPE([volatile sig_atomic_t], [], |
| [HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[ |
| #include <signal.h> |
| ]]) |
| |
| dnl Ensure the type pid_t gets defined. |
| AC_REQUIRE([AC_TYPE_PID_T]) |
| |
| AC_REQUIRE([AC_TYPE_UID_T]) |
| |
| dnl Persuade glibc <signal.h> to define sighandler_t. |
| AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) |
| AC_CHECK_TYPE([sighandler_t], [], [HAVE_SIGHANDLER_T=0], [[ |
| #include <signal.h> |
| ]]) |
| |
| dnl Check for declarations of anything we want to poison if the |
| dnl corresponding gnulib module is not in use. |
| gl_WARN_ON_USE_PREPARE([[#include <signal.h> |
| ]], [pthread_sigmask sigaction |
| sigaddset sigdelset sigemptyset sigfillset sigismember |
| sigpending sigprocmask]) |
| ]) |
| |
| AC_DEFUN([gl_CHECK_TYPE_SIGSET_T], |
| [ |
| AC_CHECK_TYPES([sigset_t], |
| [gl_cv_type_sigset_t=yes], [gl_cv_type_sigset_t=no], |
| [[ |
| #include <signal.h> |
| /* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */ |
| #include <sys/types.h> |
| ]]) |
| if test $gl_cv_type_sigset_t != yes; then |
| HAVE_SIGSET_T=0 |
| fi |
| ]) |
| |
| AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR], |
| [ |
| dnl Use AC_REQUIRE here, so that the default settings are expanded once only. |
| AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) |
| gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
| dnl Define it also as a C macro, for the benefit of the unit tests. |
| gl_MODULE_INDICATOR_FOR_TESTS([$1]) |
| ]) |
| |
| AC_DEFUN([gl_SIGNAL_H_DEFAULTS], |
| [ |
| GNULIB_PTHREAD_SIGMASK=0; AC_SUBST([GNULIB_PTHREAD_SIGMASK]) |
| GNULIB_RAISE=0; AC_SUBST([GNULIB_RAISE]) |
| GNULIB_SIGNAL_H_SIGPIPE=0; AC_SUBST([GNULIB_SIGNAL_H_SIGPIPE]) |
| GNULIB_SIGPROCMASK=0; AC_SUBST([GNULIB_SIGPROCMASK]) |
| GNULIB_SIGACTION=0; AC_SUBST([GNULIB_SIGACTION]) |
| dnl Assume proper GNU behavior unless another module says otherwise. |
| HAVE_POSIX_SIGNALBLOCKING=1; AC_SUBST([HAVE_POSIX_SIGNALBLOCKING]) |
| HAVE_PTHREAD_SIGMASK=1; AC_SUBST([HAVE_PTHREAD_SIGMASK]) |
| HAVE_RAISE=1; AC_SUBST([HAVE_RAISE]) |
| HAVE_SIGSET_T=1; AC_SUBST([HAVE_SIGSET_T]) |
| HAVE_SIGINFO_T=1; AC_SUBST([HAVE_SIGINFO_T]) |
| HAVE_SIGACTION=1; AC_SUBST([HAVE_SIGACTION]) |
| HAVE_STRUCT_SIGACTION_SA_SIGACTION=1; |
| AC_SUBST([HAVE_STRUCT_SIGACTION_SA_SIGACTION]) |
| HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=1; |
| AC_SUBST([HAVE_TYPE_VOLATILE_SIG_ATOMIC_T]) |
| HAVE_SIGHANDLER_T=1; AC_SUBST([HAVE_SIGHANDLER_T]) |
| REPLACE_PTHREAD_SIGMASK=0; AC_SUBST([REPLACE_PTHREAD_SIGMASK]) |
| REPLACE_RAISE=0; AC_SUBST([REPLACE_RAISE]) |
| ]) |