Your bug report

#21309: libtool should not use the dangerous, undocumented AC_TRY_EVAL macro, currently broken

which was filed against the libtool package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 21309@debbugs.gnu.org.

-- 
21309: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=21309
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