無法在Windows上構建gem本機擴展

Question

我正在嘗試在Windows計算機上安裝蒲公英 gem，但是它一直失敗：

C:\Users\William>gem install dandelion --platform=ruby
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing dandelion:
ERROR: Failed to build gem native extension.

C:/Ruby22/bin/ruby.exe -r ./siteconf20150623-7568-1ikffjg.rb extconf.rb
checking for gmake... no
checking for make... yes
checking for cmake... yes
checking for pkg-config... yes
-- cmake .. -DBUILD_CLAR=OFF -DTHREADSAFE=ON -DBUILD_SHARED_LIBS=OFF -DCMAKE_C_
FLAGS=-fPIC -DCMAKE_BUILD_TYPE=RelWithDebInfo -G "Unix Makefiles"
-- C:\DevKit\bin/make.exe
checking for main() in -lgit2... *** 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:/Ruby22/bin/$(RUBY_BASE_NAME)
--use-system-libraries
--with-git2-dir
--without-git2-dir
--with-git2-include
--without-git2-include=${git2-dir}/include
--with-git2-lib
--without-git2-lib=${git2-dir}/lib
--with-git2lib
--without-git2lib
C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:541:in `try_link0'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:556:in `try_link'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:735:in `try_func'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:966:in `block in have_library'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:911:in `block in checking_for'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:351:in `block (2 levels) in postpone'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:321:in `open'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:351:in `block in postpone'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:321:in `open'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:347:in `postpone'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:910:in `checking_for'
from C:/Ruby22/lib/ruby/2.2.0/mkmf.rb:961:in `have_library'
from extconf.rb:89:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby22/lib/ruby/gems/2.2.0/gems/rugged-0.2
2.1b1 for inspection.
Results logged to C:/Ruby22/lib/ruby/gems/2.2.0/extensions/x86-mingw32/2.2.0/rug
ged-0.22.1b1/gem_make.out

指出“您必須首先安裝開發工具”的錯誤令人頭疼。 我已經安裝了DevKit。

任何想法如何解決此錯誤？

Answer 1

這很有趣。 我要libgit2猜測，並說您在C:/Program Files (x86)/libgit2/lib有一個libgit2版本，並且該文件夾在您的Path或某個其他環境變量中。

解決方法是將該文件夾移出它可能位於的環境變量中。這樣可以使rugged正確構建。

問題

當gcc嘗試測試libgit2庫時，它發現它可能位於C:/Program Files (x86)/libgit2/lib並使用-LC:/Program Files (x86)/libgit2/lib 。

問題是它沒有被正確地轉義，這導致

gcc: error: Files: No such file or directory
gcc: error: (x86)/libgit2/lib: No such file or directory

這實際上就是為什么無法將Ruby安裝在帶空格的文件夾中的原因。

附帶說明： 我想指出，除了常規的DevKit之外，您還可以在Path某些位置安裝cmake和pkg-config