Your bug report

#21336: configure fails to detect C++ compiler on case-insensitive FS

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

The explanation is attached below, along with your original report.
If you require more details, please reply to 21336@debbugs.gnu.org.

-- 
21336: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21336
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