From: Eric Wong <normalperson@...>
Date: 2016-05-21T10:01:41+00:00
Subject: [ruby-core:75661] Re: [Ruby trunk Bug#12409] -fexcess-precision=standard is making it hard to compile my gem

sam.saffron@gmail.com wrote:
> https://github.com/discourse/mini_racer

I just cloned git://github.com/discourse/mini_racer and looked
at extconf.rb...

I think you need to use $CXXFLAGS instead of $CPPFLAGS.
$CPPFLAGS is C preprocessor, $CXXFLAGS is for C++.
I didn't try to compile since I don't want to deal with V8 or any JS

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