Ruby 2.2.0 で CocoaPods のインストールに失敗した。 cocoapods-0.35.0 が依存する json-1.8.1 の native extension のビルドに失敗するようだ:
% gem install cocoapods
Building native extensions. This could take a while...
ERROR: Error installing cocoapods:
ERROR: Failed to build gem native extension.
(略)
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));
^
(略)
make failed, exit code 2
Gem files will remain installed in /Users/uasi/.rbenv/gems/2.2.0/gems/json-1.8.1 for inspection.
Results logged to /Users/uasi/.rbenv/gems/2.2.0/extensions/x86_64-darwin-14/2.2.0-static/json-1.8.1/gem_make.out
以下の手順で json-1.8.1 にパッチを当てて対処した:
cd ~/tmp
# json gem を取得して展開
gem fetch json -v 1.8.1
gem unpack json-1.8.1.gem
# ソースにパッチを当てる
cd json-1.8.1
curl -s https://patch-diff.githubusercontent.com/raw/flori/json/pull/231.patch | git --git-dir= apply -
# gem をパッケージングしてインストール
gem build json.gemspec
gem install ./json-1.8.1.gem
#gem install -i ../vendor/bundle ./json-1.8.1.gem # Bundler 向け
# 後片付け
cd ..
rm -r json-1.8.1 json-1.8.1.gem
# cocoapods をインストール
gem install cocoapods