Re: test-sched build error on CentOS 5

[Bruno Haible]

Eric Blake wrote:
> Thanks for the report.  This is due to a bug in the glibc headers in use 
> by CentOS 5, and we should be able to fix our <sched.h> replacement to 
> work around that glibc bug (which has since been fixed in upstream glibc).

Yes. I'm applying this workaround.


2011-09-19  Bruno Haible  <address@hidden>

        sched: Ensure pid_t is defined.
        * m4/sched_h.m4 (gl_SCHED_H): Arrange to override <sched.h> if it does
        not define pid_t.
        * lib/sched.in.h: Include <sys/types.h>.
        * doc/posix-headers/sched.texi: Mention the pid_t problem.
        Reported by Tom G. Christensen <address@hidden>.

--- doc/posix-headers/sched.texi.orig   Mon Sep 19 23:46:57 2011
+++ doc/posix-headers/sched.texi        Mon Sep 19 23:42:56 2011
@@ -11,6 +11,9 @@
 This header file is missing on some platforms:
 Minix 3.1.8, mingw, MSVC 9, BeOS.
 @item
+This header file does not define the type @code{pid_t} on some platforms:
+glibc 2.11, MacOS X 10.5.
address@hidden
 @code{struct sched_param} is not defined on some platforms:
 Haiku.
 @item
--- lib/sched.in.h.orig Mon Sep 19 23:46:57 2011
+++ lib/sched.in.h      Mon Sep 19 23:46:08 2011
@@ -29,6 +29,12 @@
 #ifndef address@hidden@_SCHED_H
 #define address@hidden@_SCHED_H
 
+/* Get pid_t.
+   This is needed on glibc 2.11 (see
+   glibc bug <http://sourceware.org/bugzilla/show_bug.cgi?id=13198>)
+   and MacOS X 10.5.  */
+#include <sys/types.h>
+
 #if address@hidden@
 
 # if !GNULIB_defined_struct_sched_param
--- m4/sched_h.m4.orig  Mon Sep 19 23:46:57 2011
+++ m4/sched_h.m4       Mon Sep 19 23:44:02 2011
@@ -1,4 +1,4 @@
-# sched_h.m4 serial 5
+# sched_h.m4 serial 6
 dnl Copyright (C) 2008-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -13,6 +13,7 @@
        #include <sched.h>
        struct sched_param a;
        int b[] = { SCHED_FIFO, SCHED_RR, SCHED_OTHER };
+       pid_t t1;
      ]])],
     [SCHED_H=''],
     [SCHED_H='sched.h'
-- 
In memoriam James A. Garfield <http://en.wikipedia.org/wiki/James_A._Garfield>