| Ying Wang | 0543663 | 2013-04-05 16:01:00 -0700 | [diff] [blame] | 1 | # sigaction.m4 serial 7 |
| 2 | dnl Copyright (C) 2008-2012 Free Software Foundation, Inc. |
| 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 | # Determine if sigaction interface is present. |
| 8 | AC_DEFUN([gl_SIGACTION], |
| 9 | [ |
| 10 | AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) |
| 11 | AC_CHECK_FUNCS_ONCE([sigaction]) |
| 12 | if test $ac_cv_func_sigaction = yes; then |
| 13 | AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], , , |
| 14 | [[#include <signal.h>]]) |
| 15 | if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then |
| 16 | HAVE_STRUCT_SIGACTION_SA_SIGACTION=0 |
| 17 | fi |
| 18 | else |
| 19 | HAVE_SIGACTION=0 |
| 20 | fi |
| 21 | ]) |
| 22 | |
| 23 | # Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c. |
| 24 | AC_DEFUN([gl_PREREQ_SIGACTION], |
| 25 | [ |
| 26 | AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) |
| 27 | AC_REQUIRE([AC_C_RESTRICT]) |
| 28 | AC_REQUIRE([AC_TYPE_UID_T]) |
| 29 | AC_REQUIRE([gl_PREREQ_SIG_HANDLER_H]) |
| 30 | AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt]) |
| 31 | AC_CHECK_TYPES([siginfo_t], [], [], [[ |
| 32 | #include <signal.h> |
| 33 | ]]) |
| 34 | if test $ac_cv_type_siginfo_t = no; then |
| 35 | HAVE_SIGINFO_T=0 |
| 36 | fi |
| 37 | ]) |
| 38 | |
| 39 | # Prerequisites of lib/sig-handler.h. |
| 40 | AC_DEFUN([gl_PREREQ_SIG_HANDLER_H], [:]) |