dnl this magic incantation is needed to prevent AC_PROG_CC from setting the
dnl default CFLAGS (something like "-g -O2") - we don't need this as add
dnl -g and -O flags ourselves below
dnl this magic incantation is needed to prevent AC_PROG_CC from setting the
dnl default CFLAGS (something like "-g -O2") - we don't need this as add
dnl -g and -O flags ourselves below