Re: sigaction, SA_SIGINFO, and SIG_IGN

[Bruno Haible]

Eric Blake wrote:
> it was failing to compile on mingw.  Checking in this:

To keep the *.m4 macros in sync with the code, I'm committing this:


2008-06-23  Bruno Haible  <address@hidden>

        * m4/signalblocking.m4 (gl_PREREQ_SIG_HANDLER_H): Remove macro.
        (gl_PREREQ_SIGPROCMASK): Don't invoke it.
        * m4/sigaction.m4 (gl_PREREQ_SIG_HANDLER_H): New macro, moved here from
        m4/signalblocking.m4.
        (gl_PREREQ_SIGACTION): Don't invoke it.
        * m4/nanosleep.m4 (gl_PREREQ_NANOSLEEP): Invoke
        gl_PREREQ_SIG_HANDLER_H.
        * m4/fatal-signal.m4 (gl_FATAL_SIGNAL): Likewise.
        Don't check for sigaction here.

--- m4/fatal-signal.m4.orig     2008-06-23 22:40:02.000000000 +0200
+++ m4/fatal-signal.m4  2008-06-23 22:39:10.000000000 +0200
@@ -1,4 +1,4 @@
-# fatal-signal.m4 serial 5
+# fatal-signal.m4 serial 6
 dnl Copyright (C) 2003-2004, 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,
@@ -8,5 +8,5 @@
 [
   AC_REQUIRE([gt_TYPE_SIG_ATOMIC_T])
   AC_CHECK_HEADERS_ONCE(unistd.h)
-  AC_CHECK_FUNCS(sigaction)
+  gl_PREREQ_SIG_HANDLER_H
 ])
--- m4/nanosleep.m4.orig        2008-06-23 22:40:02.000000000 +0200
+++ m4/nanosleep.m4     2008-06-23 22:38:50.000000000 +0200
@@ -1,4 +1,4 @@
-#serial 24
+#serial 25
 
 dnl From Jim Meyering.
 dnl Check for the nanosleep function.
@@ -112,4 +112,5 @@
 AC_DEFUN([gl_PREREQ_NANOSLEEP],
 [
   AC_CHECK_HEADERS_ONCE(sys/select.h)
+  gl_PREREQ_SIG_HANDLER_H
 ])
--- m4/sigaction.m4.orig        2008-06-23 22:40:02.000000000 +0200
+++ m4/sigaction.m4     2008-06-23 22:37:42.000000000 +0200
@@ -1,4 +1,4 @@
-# sigaction.m4 serial 2
+# sigaction.m4 serial 3
 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,
@@ -30,5 +30,11 @@
     HAVE_SIGINFO_T=0
     AC_SUBST([HAVE_SIGINFO_T])
   fi
-  gl_PREREQ_SIG_HANDLER_H
+])
+
+# Prerequisites of lib/sig-handler.h.
+AC_DEFUN([gl_PREREQ_SIG_HANDLER_H],
+[
+  AC_REQUIRE([AC_C_INLINE])
+  :
 ])
--- m4/signalblocking.m4.orig   2008-06-23 22:40:02.000000000 +0200
+++ m4/signalblocking.m4        2008-06-23 22:37:20.000000000 +0200
@@ -1,4 +1,4 @@
-# signalblocking.m4 serial 8
+# signalblocking.m4 serial 9
 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,
@@ -39,12 +39,4 @@
   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])
-  :
 ])