Ruby 错误：安装sass时出错：错误：无法生成gem本机扩展

我正试图安装sass。我确实通过npm（1.14.1用dart2js 2.0.0编译）安装了它，但是我需要用Ruby（Ruby Sass 3.5.6.）安装它。现在，我运行“sudogem安装sass”时出现了一个错误

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有什么想法吗？

好的，所以找到了解决方案。如果你有这个错误。这样做：

安装rvm（）

然后我必须运行此命令以使rvm正常工作：

如果sudo grep-q secure_path/etc/sudoers；然后sudo sh-c“echo export rvmsudo_secure_path=1>>/etc/profile.d/rvm_secure_path.sh”&安装了echo环境变量；fi

接下来，使用rvm，我删除了ruby：

移除红宝石

最后安装ruby：

rvm安装ruby

不确定是否需要此步骤，但这是我在控制台中使用的：Ruby是在没有文档的情况下构建的，要构建它，请运行：rvm docs generate ri

所以我也运行了这个命令。在那之后，我终于能够安装sudo gem sass了

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现在它工作了

在mac中执行以下步骤以安装无错误的SASS

安装gpg brew安装-v gpg

安装gpg密钥 gpg2——接收键409B6B1796C275462A1703113804B82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

允许curl在不检查SSL的情况下运行（否则命令#4将抛出错误） 回声不安全>>~/.curlrc

安装rvm \curl-sSL-k | bash

要使用rvm，在#3中运行命令后将得到一个输出，如： 要开始使用RVM，您需要运行

source/Users/ymeta/.RVM/scripts/RVM

复制粘贴命令并按Enter键

删除现有的ruby版本 移除红宝石

安装ruby rvm安装ruby

rvm文档生成ri

安装sass sudogems安装sass

检查sass版本 sass——版本

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在

中可以找到相同的步骤，基本上只需删除ruby并重新安装即可。它为我解决了这个问题。我安装了rvm，然后简单地运行

rvm安装ruby

。我不需要做任何其他事情，因为安装似乎是在我的mac本机ruby上安装的。

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

current directory: /Library/Ruby/Gems/2.3.0/gems/ffi-1.9.25/ext/ffi_c
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby -r ./siteconf20181004-3909-1iytz3s.rb extconf.rb
checking for ffi.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=/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/$(RUBY_BASE_NAME)
--with-ffi_c-dir
--without-ffi_c-dir
--with-ffi_c-include
--without-ffi_c-include=${ffi_c-dir}/include
--with-ffi_c-lib
--without-ffi_c-lib=${ffi_c-dir}/lib
--with-libffi-config
--without-libffi-config
--with-pkg-config
--without-pkg-config 

/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:456:in 'try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:571:in `block in try_compile'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:524:in `with_werror'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:571:in `try_compile'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:1091:in `block in have_header'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:942:in `block in checking_for'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:350:in `block (2 levels) in postpone'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:320:in `open'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:350:in `block in postpone'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:320:in `open'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:346:in `postpone'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:941:in `checking_for'
from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/
2.3.0/mkmf.rb:1090:in `have_header'
from extconf.rb:16:in `<main>'

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

 /Library/Ruby/Gems/2.3.0/extensions/universal-darwin-18/2.3.0/ffi-1.9.25/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Library/Ruby/Gems/2.3.0/gems/ffi-1.9.25 for inspection.
Results logged to /Library/Ruby/Gems/2.3.0/extensions/universal-darwin-18/2.3.0/ffi-1.9.25/gem_make.out

package configuration for libffi is not found
"xcrun clang -o conftest - 
I/System/Library/Frameworks/Ruby.framework
/Versions/2.3/usr/include/ruby-2.3.0/universal-darwin18 - 
I/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/
include/ruby-2.3.0/ruby/backward - 
I/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/
ruby-2.3.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE - 
D_DARWIN_UNLIMITED_SELECT -D_REENTRANT    -g -Os -pipe - 
DHAVE_GCC_ATOMIC_BUILTINS conftest.c  -L. - 
L/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib -L.     
-lruby.2.3.0  -lpthread -ldl -lobjc "
In file included from conftest.c:1:
In file included from 
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/
ruby-2.3.0/ruby.h:33:
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/
ruby-2.3.0/ruby/ruby.h:24:10: fatal error: 'ruby/config.h' file not found
#include "ruby/config.h"
     ^~~~~~~~~~~~~~~
1 error generated.
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */