How to pass build flags like `--with-ruby-include` to gem install?

Question

(I know that my Ruby installation is a bit messed up, but:) I'm trying to install a native gem and it gives me an error

ytg@yui:~> sudo /usr/bin/ruby.ruby2.3 /usr/bin/gem install ruby-debug-ide
Building native extensions.  This could take a while...
ERROR:  Error installing ruby-debug-ide:
    ERROR: Failed to build gem native extension.

    current directory: /usr/lib64/ruby/gems/2.3.0/gems/ruby-debug-ide-0.6.0/ext
/usr/bin/ruby.ruby2.3 mkrf_conf.rb
Installing base gem
Building native extensions.  This could take a while...
Building native extensions.  This could take a while...
ERROR: Failed to build gem native extension.

    current directory: /usr/lib64/ruby/gems/2.3.0/gems/debase-0.2.2.beta9/ext
/usr/bin/ruby.ruby2.3 -r ./siteconf20161213-12983-1q9o2d7.rb extconf.rb
checking for vm_core.h... no
checking for vm_core.h... no
checking for vm_core.h... no
Makefile creation failed
*************************************************************

  NOTE: If your headers were not found, try passing
        --with-ruby-include=PATH_TO_HEADERS      

*************************************************************

*** 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}/lib64
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/usr/bin/$(RUBY_BASE_NAME).ruby2.3
    --with-ruby-dir
    --without-ruby-dir
    ---with-ruby-include
    --without-ruby-include=${ruby-dir}/include
    --with-ruby-lib
    --without-ruby-lib=${ruby-dir}/lib64

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /usr/lib64/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0/debase-0.2.2.beta9/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/lib64/ruby/gems/2.3.0/gems/debase-0.2.2.beta9 for inspection.
Results logged to /usr/lib64/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0/debase-0.2.2.beta9/gem_make.out
/usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:92:in `run'
  /usr/lib64/ruby/2.3.0/rubygems/ext/ext_conf_builder.rb:37:in `block in build'
  /usr/lib64/ruby/2.3.0/tempfile.rb:295:in `open'
  /usr/lib64/ruby/2.3.0/rubygems/ext/ext_conf_builder.rb:20:in `build'
  /usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:164:in `block (2 levels) in build_extension'
  /usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:163:in `chdir'
  /usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:163:in `block in build_extension'
  /usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:162:in `synchronize'
  /usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:162:in `build_extension'
  /usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:201:in `block in build_extensions'
  /usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:198:in `each'
  /usr/lib64/ruby/2.3.0/rubygems/ext/builder.rb:198:in `build_extensions'
  /usr/lib64/ruby/2.3.0/rubygems/installer.rb:742:in `build_extensions'
  /usr/lib64/ruby/2.3.0/rubygems/installer.rb:291:in `install'
  /usr/lib64/ruby/2.3.0/rubygems/request_set.rb:167:in `block in install'
  /usr/lib64/ruby/2.3.0/rubygems/request_set.rb:151:in `each'
  /usr/lib64/ruby/2.3.0/rubygems/request_set.rb:151:in `install'
  /usr/lib64/ruby/2.3.0/rubygems/dependency_installer.rb:405:in `install'
  mkrf_conf.rb:35:in `rescue in <main>'
  mkrf_conf.rb:28:in `<main>'

rake failed, exit code 1

Gem files will remain installed in /usr/lib64/ruby/gems/2.3.0/gems/ruby-debug-ide-0.6.0 for inspection.
Results logged to /usr/lib64/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0/ruby-debug-ide-0.6.0/gem_make.out

But then when I try to add the suggested argument, I get:

ytg@yui:~> sudo /usr/bin/ruby.ruby2.3 /usr/bin/gem install ruby-debug-ide --with-ruby-include="/usr/include/ruby-2.3.0/"
ERROR:  While executing gem ... (OptionParser::InvalidOption)
    invalid option: --with-ruby-include=/usr/include/ruby-2.3.0/
    /usr/lib64/ruby/2.3.0/rubygems/command.rb:378:in `handle_options'
    /usr/lib64/ruby/2.3.0/rubygems/command.rb:299:in `invoke_with_build_args'
    /usr/lib64/ruby/2.3.0/rubygems/command_manager.rb:169:in `process_args'
    /usr/lib64/ruby/2.3.0/rubygems/command_manager.rb:139:in `run'
    /usr/lib64/ruby/2.3.0/rubygems/gem_runner.rb:55:in `run'
    /usr/bin/gem:21:in `<main>'

Is there a way to make gem install recognise those header files?

Answer 1

您必须将构建标志与选项分开--。

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从帮助页面：( gem install --help)

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用法

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gem install GEMNAME [GEMNAME ...] [options] -- --build-flags [options]\n

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稍后的：

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扩展安装失败

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如果扩展在 gem 安装过程中编译失败，则不会写出 gem 规范，但 gem 仍会在存储库中解压。您可能需要指定库\xe2\x80\x99s 标头和库的路径才能继续。--您可以通过在 RubyGems 选项和扩展的构建选项之间添加一个来完成此操作：

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$ gem install some_extension_gem\n[build fails]\nGem files will remain installed in /path/to/gems/some_extension_gem-1.0 for inspection.\nResults logged to /path/to/gems/some_extension_gem-1.0/gem_make.out\n\n$ gem install some_extension_gem -- --with-extension-lib=/path/to/lib\n[build succeeds]\n

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