* m4/sxe-aux.m4 (_SXE_CHECK_PURE_OPT): Add silent-rules options to
list of known configure opts.
Signed-off-by: Steve Youngs <steve@sxemacs.org>
--enable-largefile | --disable-largefile | \
--enable-dependency-tracking | --disable-dependency-tracking | \
--enable-option-checking | --disable-option-checking | \
--enable-largefile | --disable-largefile | \
--enable-dependency-tracking | --disable-dependency-tracking | \
--enable-option-checking | --disable-option-checking | \
+ --enable-silent-rules | --disable-silent-rules | \
--with-x | --x-includes | --x-libraries | \
--build | --host | \
--program-prefix | --program-suffix | --program-transform-name | \
--with-x | --x-includes | --x-libraries | \
--build | --host | \
--program-prefix | --program-suffix | --program-transform-name | \