El Capitanでgem install pgでエラーになる時の対処
- エラー内容
ERROR: Error installing pg: ERROR: Failed to build gem native extension. /Users/ojimac/.rbenv/versions/2.2.3/bin/ruby -r ./siteconf20151105-50418-1q1vjzw.rb extconf.rb checking for pg_config... no No pg_config... trying anyway. If building fails, please try again with --with-pg-config=/path/to/pg_config checking for libpq-fe.h... no Can't find the 'libpq-fe.h header *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/Users/ojimac/.rbenv/versions/2.2.3/bin/$(RUBY_BASE_NAME) --with-pg --without-pg --enable-windows-cross --disable-windows-cross --with-pg-config --without-pg-config --with-pg_config --without-pg_config --with-pg-dir --without-pg-dir --with-pg-include --without-pg-include=${pg-dir}/include --with-pg-lib --without-pg-lib=${pg-dir}/lib extconf failed, exit code 1
- 以下のオプションをつけることで解決
$ ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install pg