Update to use caa_likely/caa_unlikely from urcu 0.6.6

[ust.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 10e1af443a4b61bdbf2786d9e458bbe366aecdd2..856894b2ca166c6f1e591179acc0d3258b82646d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -59,6 +59,27 @@ CFLAGS="-Wall $CFLAGS"
 AC_CHECK_HEADERS([urcu-bp.h], [], [AC_MSG_ERROR([Cannot find [URCU] headers (urcu-bp.h). Use [CFLAGS]=-Idir to specify their location.
 This error can also occur when the liburcu package's configure script has not been run.])])
 
+AC_MSG_CHECKING([caa_likely()])
+AC_TRY_COMPILE(
+[
+#include <urcu/compiler.h>
+],
+[
+void fct(void)
+{
+       if (caa_likely(1)) {
+       }
+}
+],
+[
+       AC_MSG_RESULT([yes])
+],
+[
+       AC_MSG_RESULT([no])
+       AC_MSG_ERROR([Please upgrade your version of liburcu to 0.6.6 or better])
+]
+)
+
 # urcu - check that URCU lib is available to compilation
 AC_CHECK_LIB([urcu-bp], [synchronize_rcu_bp], [], [AC_MSG_ERROR([Cannot find liburcu-bp lib. Use [LDFLAGS]=-Ldir to specify its location.])])