| 1 | # sigaction.m4 serial 7
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| 2 | dnl Copyright (C) 2008-2021 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_CHECK_FUNCS_ONCE([sigaction])
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| 12 | if test $ac_cv_func_sigaction = yes; then
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| 13 | AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], , ,
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| 14 | [[#include <signal.h>]])
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| 15 | if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then
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| 16 | HAVE_STRUCT_SIGACTION_SA_SIGACTION=0
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| 17 | fi
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| 18 | else
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| 19 | HAVE_SIGACTION=0
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| 20 | fi
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| 21 | ])
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| 22 |
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| 23 | # Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c.
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| 24 | AC_DEFUN([gl_PREREQ_SIGACTION],
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| 25 | [
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| 26 | AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
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| 27 | AC_REQUIRE([AC_C_RESTRICT])
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| 28 | AC_REQUIRE([AC_TYPE_UID_T])
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| 29 | AC_REQUIRE([gl_PREREQ_SIG_HANDLER_H])
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| 30 | AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
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| 31 | AC_CHECK_TYPES([siginfo_t], [], [], [[
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| 32 | #include <signal.h>
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| 33 | ]])
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| 34 | if test $ac_cv_type_siginfo_t = no; then
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| 35 | HAVE_SIGINFO_T=0
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| 36 | fi
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| 37 | ])
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| 38 |
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| 39 | # Prerequisites of lib/sig-handler.h.
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| 40 | AC_DEFUN([gl_PREREQ_SIG_HANDLER_H], [:])
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