AC_PROG_MKDIR_P
AC_PROG_SED
AX_PROG_MEMCACHED
-AX_PROG_SPHINX_BUILD(,[AC_MSG_ERROR([sphinx-build version 1.0 or greater is required])])
+AX_PROG_SPHINX_BUILD(,[AC_MSG_WARN([sphinx-build version 1.0 or greater is required to build man pages])])
AX_WITH_PROG([LCOV],[lcov])
AX_WITH_PROG([LCOV_GENHTML],[genhtml])