diff options
Diffstat (limited to 'm4/signal_h.m4')
| -rw-r--r-- | m4/signal_h.m4 | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/m4/signal_h.m4 b/m4/signal_h.m4 index 77eb125..3de9f27 100644 --- a/m4/signal_h.m4 +++ b/m4/signal_h.m4 @@ -1,5 +1,5 @@ -# signal_h.m4 serial 11 -dnl Copyright (C) 2007-2011 Free Software Foundation, Inc. +# signal_h.m4 serial 18 +dnl Copyright (C) 2007-2013 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. @@ -7,22 +7,49 @@ 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> - ]], [sigaction sigaddset sigdelset sigemptyset sigfillset sigismember + ]], [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. @@ -34,11 +61,15 @@ AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR], 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]) @@ -46,4 +77,7 @@ AC_DEFUN([gl_SIGNAL_H_DEFAULTS], 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]) ]) |