-AC_ARG_WITH(urcu, [ --with-urcu path Path to userspace RCU source], [
- AC_CHECK_FILE(["$withval/urcu.h"], [
- URCU_CFLAGS="-I$withval"
- URCU_LIBS="-L$withval -lurcu" ],
- AC_MSG_ERROR([Cannot find urcu.h in urcu directory]))
-], [
- PKG_CHECK_MODULES(URCU, [liburcu], , [
- AC_MSG_ERROR([Must specify urcu path.])])
-])
-AC_SUBST(URCU_CFLAGS)
-AC_SUBST(URCU_LIBS)
+# URCU
+
+# urcu - check if we just find the headers it out of the box.
+AC_CHECK_HEADERS([urcu-bp.h], [], [AC_MSG_ERROR([Cannot find [URCU] headers (urcu-bp.h). Use [CFLAGS]=-Idir to specify their location.])])
+
+# urcu - check that URCU lib is available to compilation
+AC_CHECK_LIB([urcu-bp], [synchronize_rcu], [], [AC_MSG_ERROR([Cannot find liburcu-bp lib. Use [LDFLAGS]=-Ldir to specify its location.])])
+
+# kcompat
+
+AC_CHECK_HEADERS([kcompat.h], [], [AC_MSG_ERROR([Cannot find kcompat headers (kcompat.h). Use [CFLAGS]=-Idir to specify their location.])])