AC_PROG_CPP
AC_PROG_RANLIB
AC_PROG_MKDIR_P
+AC_PROG_FGREP
AC_ARG_VAR([PERL], [path to Perl interpreter])
AC_PATH_PROG([PERL], perl, no)
OVS_CHECK_VALGRIND
OVS_CHECK_TTY_LOCK_DIR
OVS_CHECK_SOCKET_LIBS
+OVS_CHECK_LINKER_SECTIONS
AC_CHECK_FUNCS([strsignal])