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AC_DEFUN([jy_SORTZ],
[AC_PATH_PROG([SORT], [sort], [sort])
AC_MSG_CHECKING([if $SORT supports the -z option])
# find out if the sort command has a working -z option.
if $SORT -z -c < "${srcdir:-.}/m4/order-good.bin" 2>/dev/null >/dev/null
then
# sort has a -z option, but we have not yet established that
# sort thinks there is more than one input line there. We have
# to make sort -c do its thing with the input lines in the wrong
# order to determine that (we can't do it in one shot because
# if sort returns nonzero we cant tell that it wasn't just
# complaining about this unknown -z option.
if $SORT -z -c < "${srcdir:-.}/m4/order-bad.bin" 2>/dev/null >/dev/null
then
# sort likes -z but it doesn't seem to make \0
# a delimiter.
ac_sort_has_z=false
else
ac_sort_has_z=true
fi
else
# Doesn't like the z option.
ac_sort_has_z=false
fi
if $ac_sort_has_z
then
AC_MSG_RESULT([yes])
AC_SUBST(SORT_SUPPORTS_Z,[true])
else
AC_MSG_RESULT([no])
AC_SUBST(SORT_SUPPORTS_Z,[false])
fi
])
|
