gem install json でVirtualAlloc なんとやらのエラー

Ruby 困った 解決済み！

MinGWは入ってるし、DevKitも入ってるし、ということで、Windowsでgem install jsonしたら次のようなエラー。

$ gem install json
Fetching: json-1.8.1.gem (100%)
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
D:\J-Drive\developments\environments\MinGW\msys\1.0\bin\make.exe: *** Couldn't reserve space for cygwin's heap, Win32 error 0
ERROR:  Error installing json:
        ERROR: Failed to build gem native extension.

        D:/J-drive/developments/environments/Ruby_1.9.3/bin/ruby.exe extconf.rb
creating Makefile

make
      0 [main] us 0 init_cheap: VirtualAlloc pointer is null, Win32 error 487
AllocationBase 0x0, BaseAddress 0x60EA0000, RegionSize 0x3F0000, State 0x10000
D:\J-Drive\developments\environments\MinGW\msys\1.0\bin\make.exe: *** Couldn't reserve space for cygwin's heap, Win32 error 0


Gem files will remain installed in D:/J-Drive/developments/environments/Ruby_1.9.3/lib/ruby/gems/1.9.1/gems/json-1.8.1 for inspection.
Results logged to D:/J-Drive/developments/environments/Ruby_1.9.3/lib/ruby/gems/1.9.1/gems/json-1.8.1/ext/json/ext/generator/gem_make.out

make.exeだけ実行してもエラー

$ make
      0 [main] us 0 init_cheap: VirtualAlloc pointer is null, Win32 error 487
AllocationBase 0x0, BaseAddress 0x60EA0000, RegionSize 0x3F0000, State 0x10000
D:\J-Drive\developments\environments\MinGW\msys\1.0\bin\make.exe: *** Couldn't reserve space for cygwin's heap, Win32 error 0


調べるとmsys-1.0.dllを差し替えればうまくいくとのこと。


http://stackoverflow.com/questions/12094801/json-gem-fails-to-build-on-windows
なおエラーになる理由はこちら--> http://d.hatena.ne.jp/kazy/20080310/p1


ちゃんとうまく動きました！

$ gem install json
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
Successfully installed json-1.8.1
1 gem installed
Installing ri documentation for json-1.8.1...
Installing RDoc documentation for json-1.8.1...