From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 12 Jun 2007 20:21:43 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: [Xenomai-core] [RFC][PATCH] link-check sched_setaffinity
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>, Philippe Gerum <rpm@xenomai.org>
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Hi,

as indicated earlier, there is an issue with uClibc from the blackfin
distribution: AC_TRY_COMPILE succeeds, but linking later on fails.

So my suggestion is to try to link already during configure (and test
for missing defines differently).

Jan

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Index: configure.in
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- configure.in	(Revision 2571)
+++ configure.in	(Arbeitskopie)
@@ -516,12 +516,12 @@
 AC_CACHE_VAL(ac_cv_sched_setaffinity,
  save_CFLAGS=3D"$CFLAGS"
  CFLAGS=3D"-Wimplicit-function-declaration -Werror -D_GNU_SOURCE"
- [AC_TRY_COMPILE([#include <sched.h>],
+ [AC_TRY_LINK([#include <sched.h>],
  [cpu_set_t cpu_set; sched_setaffinity(0, sizeof(cpu_set), &cpu_set);],
  [ac_cv_sched_setaffinity=3Dnew],
  [ac_cv_sched_setaffinity=3Dbad])]
  if test $ac_cv_sched_setaffinity =3D bad ; then
-   [AC_TRY_COMPILE([#include <sched.h>],
+   [AC_TRY_LINK([#include <sched.h>],
    [cpu_set_t cpu_set; sched_setaffinity(0, &cpu_set);],
    [ac_cv_sched_setaffinity=3Dold],
    [ac_cv_sched_setaffinity=3Dno])]
Index: src/testsuite/switchtest/switchtest.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- src/testsuite/switchtest/switchtest.c	(Revision 2571)
+++ src/testsuite/switchtest/switchtest.c	(Arbeitskopie)
@@ -27,8 +27,10 @@
 typedef unsigned long cpu_set_t;
 #endif
 #define do_sched_setaffinity(pid,len,mask) 0
+#ifndef CPU_ZERO
 #define	 CPU_ZERO(set)		do { *(set) =3D 0; } while(0)
 #define	 CPU_SET(n,set) 	do { *(set) |=3D (1 << n); } while(0)
+#endif
 #endif /* HAVE_OLD_SETAFFINITY */
 #endif /* HAVE_RECENT_SETAFFINITY */
=20
Index: src/testsuite/clocktest/clocktest.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- src/testsuite/clocktest/clocktest.c	(Revision 2571)
+++ src/testsuite/clocktest/clocktest.c	(Arbeitskopie)
@@ -18,6 +18,7 @@
=20
 #include <errno.h>
 #include <pthread.h>
+#include <sched.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -35,8 +36,10 @@
 typedef unsigned long cpu_set_t;
 #endif
 #define sched_setaffinity(pid, len, mask)	do { } while (0)
+#ifndef CPU_ZERO
 #define CPU_ZERO(set)				memset(set, 0, sizeof(*set))
 #define CPU_SET(n, set)				do { } while (0)
+#endif
 #endif /* !HAVE_OLD_SETAFFINITY */
 #endif /* !HAVE_RECENT_SETAFFINITY */
=20

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