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Re: sigaction, SA_SIGINFO, and SIG_IGN


From: Bruno Haible
Subject: Re: sigaction, SA_SIGINFO, and SIG_IGN
Date: Sun, 22 Jun 2008 21:58:22 +0200
User-agent: KMail/1.5.4

I don't understand the "Due to autoconf conventions". We are not using
HAVE_SIGACTION as a #define in config.h. We are using it as a shell variable.
This shell variable is not set by either AC_REPLACE_FUNCS([sigaction])
nor by AC_CHECK_TYPE(...). So there is no conflict.

Proposed comment change:

*** lib/signal.in.h.orig        2008-06-22 21:55:31.000000000 +0200
--- lib/signal.in.h     2008-06-22 21:55:10.000000000 +0200
***************
*** 118,126 ****
  typedef struct siginfo_t siginfo_t;
  # endif /* address@hidden@ */
  
!   /* Due to autoconf conventions, we can't tell if HAVE_SIGACTION
!      means we have the type or means we have the function.  We assume
!      that all implementations either have both or neither.  */
  
  struct sigaction
  {
--- 118,125 ----
  typedef struct siginfo_t siginfo_t;
  # endif /* address@hidden@ */
  
! /* We assume that platforms which lack the sigaction() function also lack
!    the 'struct sigaction' type, and vice versa.  */
  
  struct sigaction
  {
*** m4/sigaction.m4.orig        2008-06-22 21:55:31.000000000 +0200
--- m4/sigaction.m4     2008-06-22 21:55:10.000000000 +0200
***************
*** 8,16 ****
  AC_DEFUN([gl_SIGACTION],
  [
    AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
-   dnl Due to autoconf conventions, we can't tell if HAVE_SIGACTION
-   dnl means we have the type or means we have the function.  We assume
-   dnl that all implementations either have both or neither.
    AC_REPLACE_FUNCS([sigaction])
    if test $ac_cv_func_sigaction = no ; then
      HAVE_SIGACTION=0
--- 8,13 ----





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