Re: sigaction, SA_SIGINFO, and SIG_IGN

[Bruno Haible]

Eric Blake wrote:
> I named the helper file sig-handler.h.

Since it uses 'inline', it needs AC_C_INLINE.


2008-06-22  Bruno Haible  <address@hidden>

        * m4/signalblocking.m4 (gl_PREREQ_SIG_HANDLER_H): New macro.
        (gl_PREREQ_SIGPROCMASK): Invoke it.
        * m4/sigaction.m4 (gl_PREREQ_SIGACTION): Likewise.

*** m4/sigaction.m4.orig        2008-06-22 21:40:53.000000000 +0200
--- m4/sigaction.m4     2008-06-22 21:40:46.000000000 +0200
***************
*** 1,4 ****
! # sigaction.m4 serial 1
  dnl Copyright (C) 2008 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # sigaction.m4 serial 2
  dnl Copyright (C) 2008 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
***************
*** 18,29 ****
    fi
  ])
  
! # Prerequisites of the part of lib/signal.in.h and of lib/sigprocmask.c.
  AC_DEFUN([gl_PREREQ_SIGACTION],
  [
    AC_REQUIRE([AC_C_RESTRICT])
    AC_REQUIRE([AC_TYPE_UID_T])
-   AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
    AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
    AC_CHECK_TYPES([siginfo_t], [], [], [[
  #include <signal.h>
--- 18,29 ----
    fi
  ])
  
! # Prerequisites of the part of lib/signal.in.h and of lib/sigaction.c.
  AC_DEFUN([gl_PREREQ_SIGACTION],
  [
+   AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
    AC_REQUIRE([AC_C_RESTRICT])
    AC_REQUIRE([AC_TYPE_UID_T])
    AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
    AC_CHECK_TYPES([siginfo_t], [], [], [[
  #include <signal.h>
***************
*** 32,35 ****
--- 32,36 ----
      HAVE_SIGINFO_T=0
      AC_SUBST([HAVE_SIGINFO_T])
    fi
+   gl_PREREQ_SIG_HANDLER_H
  ])
*** m4/signalblocking.m4.orig   2008-06-22 21:40:53.000000000 +0200
--- m4/signalblocking.m4        2008-06-22 21:40:46.000000000 +0200
***************
*** 1,4 ****
! # signalblocking.m4 serial 7
  dnl Copyright (C) 2001-2002, 2006-2008 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # signalblocking.m4 serial 8
  dnl Copyright (C) 2001-2002, 2006-2008 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
***************
*** 39,42 ****
--- 39,50 ----
    dnl HAVE_SIGSET_T is 1 if the system lacks the sigprocmask function but has
    dnl the sigset_t type.
    AC_SUBST([HAVE_SIGSET_T])
+   gl_PREREQ_SIG_HANDLER_H
+ ])
+ 
+ # Prerequisites of lib/sig-handler.h.
+ AC_DEFUN([gl_PREREQ_SIG_HANDLER_H],
+ [
+   AC_REQUIRE([AC_C_INLINE])
+   :
  ])