[英]Installing “libv8” gem for “therubyracer” on Windows
我在Windows上安装therubyracer
gem时遇到问题。
使用Ruby 2.1.6 32-bit
并运行
gem install libv8 -v '3.16.14.3' -- --with-system-v8
这是我得到的错误:
Installing therubyracer 0.12.1 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
C:/Ruby21/bin/ruby.exe extconf.rb
checking for main() in -lpthread... no
checking for v8.h... no
*** 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=C:/Ruby21/bin/ruby
--with-pthreadlib
--without-pthreadlib
--enable-debug
--disable-debug
--with-v8-dir
--without-v8-dir
--with-v8-include
--without-v8-include=${v8-dir}/include
--with-v8-lib
--without-v8-lib=${v8-dir}/lib
C:/Ruby21/lib/ruby/gems/2.1.0/gems/libv8-3.16.14.3/ext/libv8/location.rb:50:in
`configure': You have chosen to use the version of V8 found on your system (Libv8::Location::System::NotFoundError)
and *not* the one that is bundle with the libv8 rubygem. However,
it could not be located. please make sure you have a version of
v8 that is compatible with 3.16.14.3 installed. You may
need to special --with-v8-dir options if it is in a non-standard
location
thanks,
The Mgmt
from C:/Ruby21/lib/ruby/gems/2.1.0/gems/libv8-3.16.14.3/lib/libv8.rb:7:in `configure_makefile'
from extconf.rb:32:in `<main>'
extconf failed, exit code 1
Gem files will remain installed in C:/Ruby21/lib/ruby/gems/2.1.0/gems/therubyracer-0.12.1 for inspection.
Results logged to C:/Ruby21/lib/ruby/gems/2.1.0/extensions/x86-mingw32/2.1.0/therubyracer-0.12.1/gem_make.out
An error occurred while installing therubyracer (0.12.1), and Bundler cannot continue.
Make sure that `gem install therubyracer -v '0.12.1'` succeeds before bundling.
这有点像一把双刃剑, libv8
gem本身试图构建v8
,但事情变得疯狂,因为它使用*nix
程序来测试和设置环境。
因此,要修复它,您必须使用-- --with-system-v8
因此它不会尝试构建v8
。 不幸的是,该建议已经假定您在系统上的某个位置拥有v8
的副本。 很明显,您没有。
快速简便的方法是安装node.js并确保将其添加到您的路径中,因为它是静态编译的,所以该库位于node.exe
。 这种方法可能会出现一些奇怪的错误,但是我认为您不会碰到任何一个。
当然,实际上,您不需要therubyracer
或libv8
因为Windows附带了本身就是JavaScript引擎的JScript
,或者如果没有其他node
也足够了。
Charles Lowell的解决方案:
不,我目前无法在Windows上安装此gem。 问题是当前没有用于Windows的libv8
gem的预编译版本,而源版本仅与* nix兼容。 不一定一定要这样,它只需要花些时间使Windows编译工作即可。 https://github.com/fractaloop/libv8
就是说,Windows应该带有一个JScript,即Microsoft JavaScript运行时,它将(通过execjs )自动检测和使用它,因此您应该能够删除对therubyracer
的依赖。
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