X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=a49b39f4d973d71058ff2332c51578208f0e4a6e;hp=7a315e8a7016440d8d0d517d7962724675845765;hb=fe1f98621fe1cfafdf66c332a004e2a8c8397b2a;hpb=63b495d8b20ff76ba08d823df2e9702acc936beb

diff --git a/configure.ac b/configure.ac
index 7a315e8..a49b39f 100644
--- 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])