> M4 1.4.4 and earlier have known bugs that interfere with correct autoconf
> operation. We recommend upgrading to M4 1.4.5 or later (M4 is currently
> at 1.4.10). While you are at it, you may also want to look at upgrading
> to autoconf 2.61, although for this issue, the out-of-date m4 is most
> likely the culprit.
>
I've tested on m4 1.4.8 - the same.
> Always quote nested macro invocations.
>
>
>> 2) [CHECK_KRB(5)] instead of CHECK_KRB(5) (in all cases)
>>
>
> That's the only part that needs to be fixed.
>
OK.
But without quoting it works in most cases. AFAIN, m4 do not require this.
The bug appears only in above mentioned example.
Even if you remove
if test -z "$KRB[$1]_CONFIG" ; then
AC_MSG_FAILURE(Kerberos [$1] not found)
fi
KRB5_CFLAGS=`$KRB[$1]_CONFIG --cflags`
KRB5_LIBS=`$KRB[$1]_CONFIG --libs`
CFLAGS="$CFLAGS $KRB[$1]_CFLAGS"
LIBS="$LIBS $KRB[$1]_LIBS"
from macro all became to work fine.
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