Test for CPU_SET

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/configure.ac b/configure.ac
index 7a315e8a7016440d8d0d517d7962724675845765..a49b39f4d973d71058ff2332c51578208f0e4a6e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -231,6 +231,26 @@ AC_CHECK_FUNCS([sched_setaffinity],[
                        AC_MSG_RESULT([no])
                ])
 
+               # Confirm that we have CPU_SET, and it actually works.
+               AC_MSG_CHECKING([whether CPU_SET works])
+               AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
+               AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+                               #define _GNU_SOURCE
+                               #include <sched.h>
+                               int main()
+                               {
+                                       cpu_set_t foo, mask; CPU_SET (0, &foo);
+                                       return 0;
+                               }
+                       ]])
+               ],[
+                       # Works!
+                       AC_DEFINE(HAVE_CPU_SET, 1)
+                       AC_MSG_RESULT([yes])
+               ],[
+                       AC_MSG_RESULT([no])
+               ])
+
                # Check how many arguments does sched_setaffinity take.
                # Should be 3 or 2.
                AC_MSG_CHECKING([how many arguments sched_setaffinity takes])