使用byebug运行“ rails new myapp”命令时出现错误消息

Question

通过终端在Rails应用上制作新的红宝石时，通过命令“ rails new newapp”，我在终端中发现以下错误消息。 似乎与安装再见错误9.0.5有联系。 过了一会儿，终端说它不能成功捆绑。 我认为这是正确开发应用程序的主要障碍。 有人可以帮忙吗？

我附上相关的终止声明，并以粗体突出显示我认为问题出在哪里。

Fetching gem metadata from https://rubygems.org/
Fetching version metadata from https://rubygems.org/
Fetching dependency metadata from https://rubygems.org/
Resolving dependencies......
Using rake 11.2.2
Using i18n 0.7.0
Using json 1.8.3
Using minitest 5.9.0
Using thread_safe 0.3.5
Using builder 3.2.2
Using erubis 2.7.0
Using mini_portile2 2.1.0
Using pkg-config 1.1.7
Using rack 1.6.4
Using mime-types-data 3.2016.0521
Using arel 6.0.3
Using debug_inspector 0.0.2
Using bundler 1.12.5

Installing byebug 9.0.5 with native extensions

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

    /Users/nicholaswenzel/.rbenv/versions/2.2.3/bin/ruby -r ./siteconf20160710-36604-3ys7vr.rb extconf.rb
creating Makefile

make "DESTDIR=" clean
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

make "DESTDIR="
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

make failed, exit code 1

Gem files will remain installed in /Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/byebug-9.0.5 for inspection.
Results logged to /Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-15/2.2.0-static/byebug-9.0.5/gem_make.out
Using coffee-script-source 1.10.0
Using execjs 2.7.0
Using thor 0.19.1
Using concurrent-ruby 1.0.2
Using multi_json 1.12.1
Using sass 3.4.22
Using tilt 2.0.5
Using spring 1.7.2
Using sqlite3 1.3.11
Using turbolinks-source 5.0.0
Using rdoc 4.2.2
Using tzinfo 1.2.2
Installing nokogiri 1.6.8 with native extensions

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

    /Users/nicholaswenzel/.rbenv/versions/2.2.3/bin/ruby -r ./siteconf20160710-36604-1ukclqg.rb extconf.rb
Using pkg-config version 1.1.7
checking if the C compiler accepts ... *** 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/nicholaswenzel/.rbenv/versions/2.2.3/bin/$(RUBY_BASE_NAME)
    --help
    --clean
/Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:571:in `block in try_compile'
    from /Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:522:in `with_werror'
    from /Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:571:in `try_compile'
    from extconf.rb:138:in `nokogiri_try_compile'
    from extconf.rb:162:in `block in add_cflags'
    from /Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/2.2.0/mkmf.rb:619:in `with_cflags'
    from extconf.rb:161:in `add_cflags'
    from extconf.rb:414:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.8 for inspection.
Results logged to /Users/nicholaswenzel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-15/2.2.0-static/nokogiri-1.6.8/gem_make.out
Using rack-test 0.6.3
Using mime-types 3.1
Using binding_of_caller 0.7.2
An error occurred while installing byebug (9.0.5), and Bundler cannot continue.
Make sure that `gem install byebug -v '9.0.5'` succeeds before bundling.
         run  bundle exec spring binstub --all
* bin/rake: spring inserted
* bin/rails: spring inserted
Nicholass-MacBook-Pro:installmaster nicholaswenzel$

Answer 1

尝试，

xcode-select --install

希望这可以帮助。