Add liburcu function check to build system

rcu_thread_online and rcu_thread_offline are needed and only available
on urcu version >= 0.6.5

Reported-by: Yannick Brosseau <yannick.brosseau@polymtl.ca>
Signed-off-by: David Goulet <david.goulet@polymtl.ca>

diff --git a/configure.ac b/configure.ac
index c3fc2d2fc488b69845df425944a86d7ccb5a2e73..b38b0e2ea8990832faabe978aade15fe43e02908 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -13,7 +13,7 @@ AC_CHECK_HEADERS([ \
 ])
 
 # URCU library version needed or newer
-liburcu_version="0.6.0"
+liburcu_version=">= 0.6.5"
 
 # Check for pthread
 AC_CHECK_LIB([pthread], [pthread_create], [],
@@ -25,30 +25,33 @@ AC_CHECK_LIB([popt], [poptGetContext], [],
        [AC_MSG_ERROR([Cannot find libpopt. Use [LDFLAGS]=-Ldir to specify its location.])]
 )
 
-# Check liburcu list.h, wfqueue.h, futex.h
+# Check liburcu needed function calls
 AC_CHECK_DECL([cds_list_add], [],
        [AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu/list.h>]]
 )
-
 AC_CHECK_DECL([cds_wfq_init], [],
        [AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu/wfqueue.h>]]
 )
-
 AC_CHECK_DECL([futex_async], [],
        [AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu/futex.h>]]
 )
+AC_CHECK_DECL([rcu_thread_offline], [],
+       [AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu.h>]]
+)
+AC_CHECK_DECL([rcu_thread_online], [],
+       [AC_MSG_ERROR([liburcu $liburcu_version or newer is needed])], [[#include <urcu.h>]]
+)
 
+# Epoll check. If not present, the build will fallback on poll() API
 AX_HAVE_EPOLL(
        [AX_CONFIG_FEATURE_ENABLE(epoll)],
        [AX_CONFIG_FEATURE_DISABLE(epoll)]
 )
-
 AX_CONFIG_FEATURE(
        [epoll], [This platform supports epoll(7)],
        [HAVE_EPOLL], [This platform supports epoll(7).],
        [enable_epoll="yes"], [enable_epoll="no"]
 )
-
 AM_CONDITIONAL([COMPAT_EPOLL], [ test "$enable_epoll" = "yes" ])
 
 AC_PROG_CC