我无法弄清楚如何在我的电脑上安装rails。
我有MacOS X El Capitan。我一直在四处寻找答案并尝试不同的事情而无法让它发挥作用：
Miguels-MacBook-Pro-3:~ Miguel$ sudo gem install rails
Password:
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/Users/Miguel/.rbenv/versions/2.2.3/bin/ruby -r ./siteconf20160109-19466-eulg4w.rb extconf.rb
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
Using mini_portile version 2.0.0
checking for iconv.h... yes
checking for gzdopen() in -lz... yes
checking for iconv... yes
************************************************************************
IMPORTANT NOTICE:
Building Nokogiri with a packaged version of libxml2-2.9.2
with the following patches applied:
- 0001-Revert-Missing-initialization-for-the-catalog-module.patch
- 0002-Fix-missing-entities-after-CVE-2014-3660-fix.patch
- 0003-Stop-parsing-on-entities-boundaries-errors.patch
- 0004-Cleanup-conditional-section-error-handling.patch
- 0005-CVE-2015-1819-Enforce-the-reader-to-run-in-constant-.patch
- 0006-Another-variation-of-overflow-in-Conditional-section.patch
- 0007-Fix-an-error-in-previous-Conditional-section-patch.patch
- 0008-CVE-2015-8035-Fix-XZ-compression-support-loop.patch
- 0009-Updated-config.guess.patch
- 0010-Fix-parsering-short-unclosed-comment-uninitialized-access.patch
- 0011-Avoid-extra-processing-of-MarkupDecl-when-EOF.patch
- 0012-Avoid-processing-entities-after-encoding-conversion-.patch
- 0013-CVE-2015-7497-Avoid-an-heap-buffer-overflow-in-xmlDi.patch
- 0014-CVE-2015-5312-Another-entity-expansion-issue.patch
- 0015-Add-xmlHaltParser-to-stop-the-parser.patch
- 0016-Detect-incoherency-on-GROW.patch
- 0017-CVE-2015-7500-Fix-memory-access-error-due-to-incorre.patch
- 0018-CVE-2015-8242-Buffer-overead-with-HTML-parser-in-pus.patch
Team Nokogiri will keep on doing their best to provide security
updates in a timely manner, but if this is a concern for you and want
to use the system library instead; abort this installation process and
reinstall nokogiri as follows:
gem install nokogiri -- --use-system-libraries
[--with-xml2-config=/path/to/xml2-config]
[--with-xslt-config=/path/to/xslt-config]
If you are using Bundler, tell it to use the option:
bundle config build.nokogiri --use-system-libraries
bundle install
Note, however, that nokogiri is not fully compatible with arbitrary
versions of libxml2 provided by OS/package vendors.
************************************************************************
Extracting libxml2-2.9.2.tar.gz into tmp/x86_64-apple-darwin15.0.0/ports/libxml2/2.9.2... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0001-Revert-Missing-initialization-for-the-catalog-module.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0002-Fix-missing-entities-after-CVE-2014-3660-fix.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0003-Stop-parsing-on-entities-boundaries-errors.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0004-Cleanup-conditional-section-error-handling.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0005-CVE-2015-1819-Enforce-the-reader-to-run-in-constant-.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0006-Another-variation-of-overflow-in-Conditional-section.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0007-Fix-an-error-in-previous-Conditional-section-patch.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0008-CVE-2015-8035-Fix-XZ-compression-support-loop.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0009-Updated-config.guess.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0010-Fix-parsering-short-unclosed-comment-uninitialized-access.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0011-Avoid-extra-processing-of-MarkupDecl-when-EOF.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0012-Avoid-processing-entities-after-encoding-conversion-.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0013-CVE-2015-7497-Avoid-an-heap-buffer-overflow-in-xmlDi.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0014-CVE-2015-5312-Another-entity-expansion-issue.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0015-Add-xmlHaltParser-to-stop-the-parser.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0016-Detect-incoherency-on-GROW.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0017-CVE-2015-7500-Fix-memory-access-error-due-to-incorre.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxml2/0018-CVE-2015-8242-Buffer-overead-with-HTML-parser-in-pus.patch... OK
Running 'configure' for libxml2 2.9.2... OK
Running 'compile' for libxml2 2.9.2... OK
Running 'install' for libxml2 2.9.2... OK
Activating libxml2 2.9.2 (from /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/ports/x86_64-apple-darwin15.0.0/libxml2/2.9.2)...
************************************************************************
IMPORTANT NOTICE:
Building Nokogiri with a packaged version of libxslt-1.1.28
with the following patches applied:
- 0001-Adding-doc-update-related-to-1.1.28.patch
- 0002-Fix-a-couple-of-places-where-f-printf-parameters-wer.patch
- 0003-Initialize-pseudo-random-number-generator-with-curre.patch
- 0004-EXSLT-function-str-replace-is-broken-as-is.patch
- 0006-Fix-str-padding-to-work-with-UTF-8-strings.patch
- 0007-Separate-function-for-predicate-matching-in-patterns.patch
- 0008-Fix-direct-pattern-matching.patch
- 0009-Fix-certain-patterns-with-predicates.patch
- 0010-Fix-handling-of-UTF-8-strings-in-EXSLT-crypto-module.patch
- 0013-Memory-leak-in-xsltCompileIdKeyPattern-error-path.patch
- 0014-Fix-for-bug-436589.patch
- 0015-Fix-mkdir-for-mingw.patch
- 0016-Fix-for-type-confusion-in-preprocessing-attributes.patch
- 0017-Updated-config.guess.patch
Team Nokogiri will keep on doing their best to provide security
updates in a timely manner, but if this is a concern for you and want
to use the system library instead; abort this installation process and
reinstall nokogiri as follows:
gem install nokogiri -- --use-system-libraries
[--with-xml2-config=/path/to/xml2-config]
[--with-xslt-config=/path/to/xslt-config]
If you are using Bundler, tell it to use the option:
bundle config build.nokogiri --use-system-libraries
bundle install
************************************************************************
Extracting libxslt-1.1.28.tar.gz into tmp/x86_64-apple-darwin15.0.0/ports/libxslt/1.1.28... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0001-Adding-doc-update-related-to-1.1.28.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0002-Fix-a-couple-of-places-where-f-printf-parameters-wer.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0003-Initialize-pseudo-random-number-generator-with-curre.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0004-EXSLT-function-str-replace-is-broken-as-is.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0006-Fix-str-padding-to-work-with-UTF-8-strings.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0007-Separate-function-for-predicate-matching-in-patterns.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0008-Fix-direct-pattern-matching.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0009-Fix-certain-patterns-with-predicates.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0010-Fix-handling-of-UTF-8-strings-in-EXSLT-crypto-module.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0013-Memory-leak-in-xsltCompileIdKeyPattern-error-path.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0014-Fix-for-bug-436589.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0015-Fix-mkdir-for-mingw.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0016-Fix-for-type-confusion-in-preprocessing-attributes.patch... OK
Running git apply with /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/patches/libxslt/0017-Updated-config.guess.patch... OK
Running 'configure' for libxslt 1.1.28... OK
Running 'compile' for libxslt 1.1.28... OK
Running 'install' for libxslt 1.1.28... OK
Activating libxslt 1.1.28 (from /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1/ports/x86_64-apple-darwin15.0.0/libxslt/1.1.28)...
checking for main() in -llzma... yes
checking for xmlParseDoc() in libxml/parser.h... no
checking for xmlParseDoc() in -lxml2... no
checking for xmlParseDoc() in -llibxml2... no
-----
libxml2 is missing. Please locate mkmf.log to investigate how it is failing.
-----
*** 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/Miguel/.rbenv/versions/2.2.3/bin/$(RUBY_BASE_NAME)
--help
--clean
--use-system-libraries
--enable-static
--disable-static
--with-zlib-dir
--without-zlib-dir
--with-zlib-include
--without-zlib-include=${zlib-dir}/include
--with-zlib-lib
--without-zlib-lib=${zlib-dir}/lib
--enable-cross-build
--disable-cross-build
--with-xml2lib
--without-xml2lib
--with-libxml2lib
--without-libxml2lib
extconf failed, exit code 1
Gem files will remain installed in /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.7.1 for inspection.
Results logged to /Users/Miguel/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-15/2.2.0-static/nokogiri-1.6.7.1/gem_make.out
答案 0 :(得分：4)
首先安装必要的库：
$ brew install libxml2 libxslt libiconv
其次，安装nokogiri：
$ sudo gem install nokogiri -- --use-system-libraries --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib