Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

[MartinDelille]

When I follow the instruction to build the site locally, I have an error:

$ bundle install                        ✔  7812  14:40:37
Fetching gem metadata from https://rubygems.org/............
Fetching i18n 0.7.0
Installing i18n 0.7.0
Fetching json 1.8.1
Installing json 1.8.1 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /usr/local/lib/ruby/gems/2.5.0/gems/json-1.8.1/ext/json/ext/generator
/usr/local/opt/ruby/bin/ruby -r ./siteconf20180927-61203-1phyq4b.rb extconf.rb
creating Makefile

current directory: /usr/local/lib/ruby/gems/2.5.0/gems/json-1.8.1/ext/json/ext/generator
make "DESTDIR=" clean

current directory: /usr/local/lib/ruby/gems/2.5.0/gems/json-1.8.1/ext/json/ext/generator
make "DESTDIR="
compiling generator.c
In file included from generator.c:1:
./../fbuffer/fbuffer.h:175:47: error: too few arguments provided to function-like macro invocation
    VALUE result = rb_str_new(FBUFFER_PAIR(fb));
                                              ^
/usr/local/Cellar/ruby/2.5.1/include/ruby-2.5.0/ruby/intern.h:773:9: note: macro 'rb_str_new' defined
here
#define rb_str_new(str, len) RB_GNUC_EXTENSION_BLOCK(   \
        ^
In file included from generator.c:1:
./../fbuffer/fbuffer.h:175:11: warning: incompatible pointer to integer conversion initializing 'VALUE'
(aka 'unsigned long') with an expression of type 'VALUE (const char *, long)' (aka 'unsigned long
(const char *, long)') [-Wint-conversion]
    VALUE result = rb_str_new(FBUFFER_PAIR(fb));
          ^        ~~~~~~~~~~
...

I didn't sent the whole log but I could put it on https://pastebin.com if needed.

Here is my configuration:

• OS: macOS
• ruby version (from https://brew.sh): ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin17]

[etanot]

This issue seems to similar to this one
solution : this one work fo me
bundle update json && bundle install

[MartinDelille]

Nice! I proposed a README fix here: #237