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私はRails 4.2.7を使用しています。私はこのチュートリアルを作成しようとしています - https://github.com/webguyian/bookstoreしかし、 "json（1.8.0）のインストール中にエラーが発生し、Bundlerは続行できません"という奇妙なエラーが発生しました。 "gem install json -v '1.8.0' ""gem install json"はどのようにビルドするのですか？
localhost:bookstore-master davea$ gem install json -v '1.8.0'
Building native extensions. This could take a while...
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
current directory: /Users/davea/.rvm/gems/ruby-2.3.0/gems/json-1.8.0/ext/json/ext/generator
/Users/davea/.rvm/rubies/ruby-2.3.0/bin/ruby -r ./siteconf20161007-50119-1huurrz.rb extconf.rb
creating Makefile
current directory: /Users/davea/.rvm/gems/ruby-2.3.0/gems/json-1.8.0/ext/json/ext/generator
make "DESTDIR=" clean
current directory: /Users/davea/.rvm/gems/ruby-2.3.0/gems/json-1.8.0/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));
^
/Users/davea/.rvm/rubies/ruby-2.3.0/include/ruby-2.3.0/ruby/intern.h:797:9: note: macro 'rb_str_new' defined here
#define rb_str_new(str, len) __extension__ ( \
^
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));
^ ~~~~~~~~~~
1 warning and 1 error generated.
make: *** [generator.o] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/davea/.rvm/gems/ruby-2.3.0/gems/json-1.8.0 for inspection.
Results logged to /Users/davea/.rvm/gems/ruby-2.3.0/extensions/x86_64-darwin-14/2.3.0/json-1.8.0/gem_make.out
私はこれが何を意味するのか、それを修正する方法がわかりません。何か案は？