问题描述
我正在尝试安装Nokogiri gem与Ruby on Rails一起使用，但是无论我安装哪个软件包，我都无法构建它。我正在运行Ubuntu 20.04。
我已经在Nokogiri网站（https://nokogiri.org/tutorials/installing_nokogiri.html）上安装了本指南中的所有软件包：
sudo apt-get install build-essential patch ruby-dev zlib1g-dev liblzma-dev
gem install nokogiri
我正在使用RVM，因此我还安装了libgmp-dev软件包，上面的教程也建议这样做。
在寻找其他解决方案时，我还安装了以下软件包：
sudo apt-get install gcc ruby-dev libxslt-dev libxml2-dev zlib1g-dev
Ruby版本：2.7.1
RVM版本：1.29.10
宝石版本：3.1.2
gem_make.out
current directory: /home/dan/.rvm/gems/ruby-2.7.1/gems/nokogiri-1.10.10/ext/nokogiri
/usr/share/rvm/rubies/ruby-2.7.1/bin/ruby -I /usr/share/rvm/rubies/ruby-2.7.1/lib/ruby/2.7.0 -r ./siteconf20200924-8532-1t7wwwh.rb extconf.rb
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=/usr/share/rvm/rubies/ruby-2.7.1/bin/$(RUBY_BASE_NAME)
--help
--clean
/usr/share/rvm/rubies/ruby-2.7.1/lib/ruby/2.7.0/mkmf.rb:471:in `try_do': The compiler Failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /usr/share/rvm/rubies/ruby-2.7.1/lib/ruby/2.7.0/mkmf.rb:597:in `block in try_compile'
from /usr/share/rvm/rubies/ruby-2.7.1/lib/ruby/2.7.0/mkmf.rb:544:in `with_werror'
from /usr/share/rvm/rubies/ruby-2.7.1/lib/ruby/2.7.0/mkmf.rb:597:in `try_compile'
from extconf.rb:138:in `nokogiri_try_compile'
from extconf.rb:162:in `block in add_cflags'
from /usr/share/rvm/rubies/ruby-2.7.1/lib/ruby/2.7.0/mkmf.rb:655:in `with_cflags'
from extconf.rb:161:in `add_cflags'
from extconf.rb:416:in `<main>'
To see why this extension Failed to compile,please check the mkmf.log which can be found here:
/home/dan/.rvm/gems/ruby-2.7.1/extensions/x86_64-linux/2.7.0/nokogiri-1.10.10/mkmf.log
extconf Failed,exit code 1
mkmf.log
"gcc -o conftest -I/usr/share/rvm/rubies/ruby-2.7.1/include/ruby-2.7.0/x86_64-linux -I/usr/share/rvm/rubies/ruby-2.7.1/include/ruby-2.7.0/ruby/backward -I/usr/share/rvm/rubies/ruby-2.7.1/include/ruby-2.7.0 -I. -O3 -ggdb3 -Wall -Wextra -Wdeprecated-declarations -Wduplicated-cond -Wimplicit-function-declaration -Wimplicit-int -Wmisleading-indentation -Wpointer-arith -Wwrite-strings -Wimplicit-fallthrough=0 -Wmissing-noreturn -Wno-cast-function-type -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-packed-bitfield-compat -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wsuggest-attribute=format -Wsuggest-attribute=noreturn -Wunused-variable -fPIC conftest.c -L. -L/usr/share/rvm/rubies/ruby-2.7.1/lib -Wl,-rpath,/usr/share/rvm/rubies/ruby-2.7.1/lib -L. -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,'/../lib' -Wl,'/../lib' -lruby -lm -lc "
gcc: error: unrecognized command line option '-Wduplicated-cond'
gcc: error: unrecognized command line option '-Wmisleading-indentation'
gcc: error: unrecognized command line option '-Wimplicit-fallthrough=0'
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: int main(int argc,char **argv)
4: {
5: return !!argv[argc];
6: }
/* end */
任何帮助将不胜感激。
解决方法
Ubuntu 20.04。 Ruby 2.7.1。
将rvm更改为rbenv可以解决此错误。
您必须对Ruby 2.7.x进行完整编译才能将nokogiri 1.10.10安装在Ubuntu 20.04上。
进行全新安装：
rvm install 2.7 --disable-binary
要重新安装现有的红宝石版本，请使用：
rvm reinstall 2.7 --disable-binary
我与Ruby等一起重新安装了Ubuntu 20.04，它可以正常工作。我不知道出了什么问题，也不知道下面的任何解决方案是否可行。
,可以确认。去rbenv也对我有用。
我添加了同样的问题。在这种环境下：
- ubuntu 20.04 LTS
- 红宝石2.7.0
- 宝石3.1.2
- 捆绑器2.1.4，
这里https://mrtan.me/post/34.html/所述的步骤对我有用：
sudo apt-get install build-essential patch ruby-dev zlib1g-dev liblzma-dev
gem install nokogiri
bundle