cannot make-cc1plus warnings lead to error

[aliabbaC]

Hi dears, In system: Fedora 21 Ruby 2.1.7 GCC 4.9.2

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I follow the instructions but afer $./prepare.sh $ruby extconf.rb when trying to $make and $make install, I got an error:

cc1plus: some warnings being treated as errors Makefile:217: recipe for target 'export_wrap.o' failed make: *** [export_wrap.o] Error 1

And the entire log of this error is bellow cc1plus error.txt

I searched about this error but all of replies are about how to disable Werrors and etc.:-( Is there any solution?