+## ##
+## Set defines for optional features conditionnals in the source code ##
+## ##
+
+AC_DEFINE_UNQUOTED([LTTNG_SYSTEM_RUNDIR], ["$lttng_system_rundir"], [LTTng system runtime directory])
+
+# Defined in include/lttng/ust-version.h
+AC_DEFINE([LTTNG_UST_MAJOR_VERSION], ust_version_major, [LTTng UST major version])
+AC_DEFINE([LTTNG_UST_MINOR_VERSION], ust_version_minor, [LTTng UST minor version])
+AC_DEFINE([LTTNG_UST_PATCHLEVEL_VERSION], ust_version_patch, [LTTng UST patch version])
+AC_DEFINE([LTTNG_UST_VERSION], ["]ust_version["], [LTTng UST version string])
+AC_DEFINE([LTTNG_UST_LIB_SONAME_MAJOR], [ust_lib_version_current], [Major SONAME number of liblttng-ust])
+AC_DEFINE([LTTNG_UST_CTL_LIB_SONAME_MAJOR], [ust_ctl_lib_version_current], [Major SONAME number of liblttng-ust-ctl])
+
+