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Annotation of embedaddon/libiconv/srcm4/signal_h.m4, revision 1.1.1.3

1.1.1.3 ! misho       1: # signal_h.m4 serial 18
        !             2: dnl Copyright (C) 2007-2019 Free Software Foundation, Inc.
1.1       misho       3: dnl This file is free software; the Free Software Foundation
                      4: dnl gives unlimited permission to copy and/or distribute it,
                      5: dnl with or without modifications, as long as this notice is preserved.
                      6: 
                      7: AC_DEFUN([gl_SIGNAL_H],
                      8: [
                      9:   AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
1.1.1.2   misho      10:   AC_REQUIRE([gl_CHECK_TYPE_SIGSET_T])
                     11:   gl_NEXT_HEADERS([signal.h])
                     12: 
1.1       misho      13: # AIX declares sig_atomic_t to already include volatile, and C89 compilers
                     14: # then choke on 'volatile sig_atomic_t'.  C99 requires that it compile.
                     15:   AC_CHECK_TYPE([volatile sig_atomic_t], [],
                     16:     [HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[
                     17: #include <signal.h>
                     18:     ]])
1.1.1.2   misho      19: 
1.1.1.3 ! misho      20:   dnl Ensure the type pid_t gets defined.
        !            21:   AC_REQUIRE([AC_TYPE_PID_T])
        !            22: 
1.1.1.2   misho      23:   AC_REQUIRE([AC_TYPE_UID_T])
                     24: 
                     25:   dnl Persuade glibc <signal.h> to define sighandler_t.
                     26:   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
                     27:   AC_CHECK_TYPE([sighandler_t], [], [HAVE_SIGHANDLER_T=0], [[
                     28: #include <signal.h>
                     29:     ]])
                     30: 
                     31:   dnl Check for declarations of anything we want to poison if the
                     32:   dnl corresponding gnulib module is not in use.
                     33:   gl_WARN_ON_USE_PREPARE([[#include <signal.h>
                     34:     ]], [pthread_sigmask sigaction
                     35:     sigaddset sigdelset sigemptyset sigfillset sigismember
                     36:     sigpending sigprocmask])
                     37: ])
                     38: 
                     39: AC_DEFUN([gl_CHECK_TYPE_SIGSET_T],
                     40: [
                     41:   AC_CHECK_TYPES([sigset_t],
                     42:     [gl_cv_type_sigset_t=yes], [gl_cv_type_sigset_t=no],
                     43:     [[
                     44:       #include <signal.h>
                     45:       /* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.  */
                     46:       #include <sys/types.h>
                     47:     ]])
                     48:   if test $gl_cv_type_sigset_t != yes; then
                     49:     HAVE_SIGSET_T=0
                     50:   fi
1.1       misho      51: ])
                     52: 
                     53: AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR],
                     54: [
                     55:   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
                     56:   AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
1.1.1.2   misho      57:   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
                     58:   dnl Define it also as a C macro, for the benefit of the unit tests.
                     59:   gl_MODULE_INDICATOR_FOR_TESTS([$1])
1.1       misho      60: ])
                     61: 
                     62: AC_DEFUN([gl_SIGNAL_H_DEFAULTS],
                     63: [
1.1.1.2   misho      64:   GNULIB_PTHREAD_SIGMASK=0;    AC_SUBST([GNULIB_PTHREAD_SIGMASK])
1.1.1.3 ! misho      65:   GNULIB_RAISE=0;              AC_SUBST([GNULIB_RAISE])
1.1       misho      66:   GNULIB_SIGNAL_H_SIGPIPE=0;   AC_SUBST([GNULIB_SIGNAL_H_SIGPIPE])
                     67:   GNULIB_SIGPROCMASK=0;        AC_SUBST([GNULIB_SIGPROCMASK])
                     68:   GNULIB_SIGACTION=0;          AC_SUBST([GNULIB_SIGACTION])
                     69:   dnl Assume proper GNU behavior unless another module says otherwise.
                     70:   HAVE_POSIX_SIGNALBLOCKING=1; AC_SUBST([HAVE_POSIX_SIGNALBLOCKING])
1.1.1.2   misho      71:   HAVE_PTHREAD_SIGMASK=1;      AC_SUBST([HAVE_PTHREAD_SIGMASK])
1.1.1.3 ! misho      72:   HAVE_RAISE=1;                AC_SUBST([HAVE_RAISE])
1.1       misho      73:   HAVE_SIGSET_T=1;             AC_SUBST([HAVE_SIGSET_T])
                     74:   HAVE_SIGINFO_T=1;            AC_SUBST([HAVE_SIGINFO_T])
                     75:   HAVE_SIGACTION=1;            AC_SUBST([HAVE_SIGACTION])
                     76:   HAVE_STRUCT_SIGACTION_SA_SIGACTION=1;
                     77:                                AC_SUBST([HAVE_STRUCT_SIGACTION_SA_SIGACTION])
                     78:   HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=1;
                     79:                                AC_SUBST([HAVE_TYPE_VOLATILE_SIG_ATOMIC_T])
1.1.1.2   misho      80:   HAVE_SIGHANDLER_T=1;         AC_SUBST([HAVE_SIGHANDLER_T])
                     81:   REPLACE_PTHREAD_SIGMASK=0;   AC_SUBST([REPLACE_PTHREAD_SIGMASK])
1.1.1.3 ! misho      82:   REPLACE_RAISE=0;             AC_SUBST([REPLACE_RAISE])
1.1       misho      83: ])