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我正在尝试更新我的 pg gem，但出现以下错误

Building native extensions.  This could take a while...
ERROR:  Error installing pg:
    ERROR: Failed to build gem native extension.

        /Users/larson/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb --with-pg-config=/Library/PostgreSQL/9.1/bin/pg_config
Using config values from /Library/PostgreSQL/9.1/bin/pg_config
checking for libpq-fe.h... *** 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/larson/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
    --with-pg
    --without-pg
    --with-pg-dir
    --without-pg-dir
    --with-pg-include
    --without-pg-include=${pg-dir}/include
    --with-pg-lib
    --without-pg-lib=${pg-dir}/lib
    --with-pg-config
/Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:452:in `try_cpp'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:853:in `block in find_header'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postpone'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
    from /Users/larson/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:852:in `find_header'
    from extconf.rb:40:in `<main>'


Gem files will remain installed in /Users/larson/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.13.2 for inspection.
Results logged to /Users/larson/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.13.2/ext/gem_make.out

我尝试搜索 mkmf.log 文件但找不到。我尝试了几种方法，包括放置 pg_conf 文件的目录，但到目前为止没有任何效果。我正在 10.6.8 上尝试这个。雪豹和我的红宝石是 1.9.2-p290。我安装了 pg 9.1。

我试过这个：

宝石安装 pg

gem install pg -- --with-pg-config=/usr/local/bin/pg_config

这个问题是在我更换了我的 macbook pro 硬盘并通过时间机器恢复系统后出现的。我应该重新安装 XCode 吗？还有其他建议吗？

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1 回答 1

8

我有一个类似的问题。我通过更新 rvm 解决了这个问题：

rvm get latest
rvm reload
rvm --force install 1.9.2
于 2012-03-16T12:33:25.227 回答