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35 lines
1021 B
Plaintext
35 lines
1021 B
Plaintext
AC_DEFUN([jy_SORTZ],
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[AC_PATH_PROG([SORT], [sort], [sort])
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AC_MSG_CHECKING([if $SORT supports the -z option])
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# find out if the sort command has a working -z option.
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if $SORT -z -c < "${srcdir:-.}/m4/order-good.bin" 2>/dev/null >/dev/null
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then
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# sort has a -z option, but we have not yet established that
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# sort thinks there is more than one input line there. We have
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# to make sort -c do its thing with the input lines in the wrong
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# order to determine that (we can't do it in one shot because
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# if sort returns nonzero we cant tell that it wasn't just
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# complaining about this unknown -z option.
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if $SORT -z -c < "${srcdir:-.}/m4/order-bad.bin" 2>/dev/null >/dev/null
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then
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# sort likes -z but it doesn't seem to make \0
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# a delimiter.
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ac_sort_has_z=false
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else
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ac_sort_has_z=true
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fi
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else
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# Doesn't like the z option.
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ac_sort_has_z=false
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fi
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if $ac_sort_has_z
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then
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AC_MSG_RESULT([yes])
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AC_SUBST(SORT_SUPPORTS_Z,[true])
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else
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AC_MSG_RESULT([no])
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AC_SUBST(SORT_SUPPORTS_Z,[false])
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fi
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])
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