Revert "Use initial-exec TLS model"

[lttng-ust.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 68f41315c9bee4ed00aa60c4f37a89a73f9c0779..fb2f27864ce9f7c530a3b798b4203c912b2e6eb4 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -249,22 +249,26 @@ AM_CONDITIONAL([HAVE_DLINFO], [test "x${ac_cv_have_decl_RTLD_DI_LINKMAP}" = "xye
 AC_CHECK_HEADERS([urcu-bp.h], [], [AC_MSG_ERROR([Cannot find [URCU] headers (urcu-bp.h). Use [CPPFLAGS]=-Idir to specify their location.
 This error can also occur when the liburcu package's configure script has not been run.])])
 
-# URCU library version needed or newer
-m4_define([WRONG_LIBURCU_MSG], [Userspace RCU (liburcu) >= 0.11.0 is needed])
-
-#Macro added in urcu 0.6.6
-AC_CHECK_DECL([caa_likely], [],
-       [AC_MSG_ERROR([WRONG_LIBURCU_MSG])], [[#include <urcu.h>]])
-#Macro added in urcu 0.11.0
-AC_CHECK_DECL([DEFINE_URCU_TLS_IE], [],
-       [AC_MSG_ERROR([WRONG_LIBURCU_MSG])], [[#include <urcu/tls-compat.h>]]
-)
-
 # urcu-cds - check that URCU Concurrent Data Structure lib is available to compilation
 # Part of Userspace RCU library 0.7.2 or better.
 AC_CHECK_LIB([urcu-cds], [_cds_lfht_new], [], [AC_MSG_ERROR([Cannot find
 liburcu-cds lib, part of Userspace RCU 0.7 or better. Use [LDFLAGS]=-Ldir to specify its location.])])
 
+AC_MSG_CHECKING([caa_likely()])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+       #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.])])