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annotate m4/sigaction.m4 @ 10245:18a5b4f796a2

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Update after lib/sig-handler.h is no longer included by lib/sigprocmask.c.
author Bruno Haible <bruno@clisp.org>
date Mon, 23 Jun 2008 22:45:30 +0200
parents f3834f370cbd
children a6493a165dd2
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1 # sigaction.m4 serial 3
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2 dnl Copyright (C) 2008 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 # Determine if sigaction interface is present.
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8 AC_DEFUN([gl_SIGACTION],
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9 [
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10 AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
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11 AC_REPLACE_FUNCS([sigaction])
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12 if test $ac_cv_func_sigaction = no ; then
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13 HAVE_SIGACTION=0
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14 AC_SUBST([HAVE_SIGACTION])
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15 gl_PREREQ_SIGACTION
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16 fi
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17 ])
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18
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19 # Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c.
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20 AC_DEFUN([gl_PREREQ_SIGACTION],
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21 [
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22 AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
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23 AC_REQUIRE([AC_C_RESTRICT])
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24 AC_REQUIRE([AC_TYPE_UID_T])
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25 AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
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26 AC_CHECK_TYPES([siginfo_t], [], [], [[
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27 #include <signal.h>
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28 ]])
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29 if test $ac_cv_type_siginfo_t = no; then
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30 HAVE_SIGINFO_T=0
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31 AC_SUBST([HAVE_SIGINFO_T])
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32 fi
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33 ])
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34
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35 # Prerequisites of lib/sig-handler.h.
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36 AC_DEFUN([gl_PREREQ_SIG_HANDLER_H],
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37 [
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38 AC_REQUIRE([AC_C_INLINE])
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39 :
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40 ])