AC_SEARCH_LIBS([dlsym], [dl], [], [AC_MSG_ERROR([*** Dynamic linking loader library not found])])
AC_CHECK_HEADERS([sys/capability.h], [], [AC_MSG_ERROR([*** POSIX caps headers not found])])
+AC_CHECK_HEADERS([linux/btrfs.h], [], [])
# unconditionally pull-in librt with old glibc versions
AC_SEARCH_LIBS([clock_gettime], [rt], [], [])
PKG_CHECK_MODULES(DBUS, [dbus-1 >= 1.3.2])
+
# ------------------------------------------------------------------------------
have_coverage=no
AC_ARG_ENABLE(coverage, AS_HELP_STRING([--enable-coverage], [enable test coverage]))