问题
I have installed rails 4.2.3 and ruby 2.2.2p95 on windows 8.1 x64 . When I try to run "bundle install" the installation fails because of json -v 1.8.3. I already have json version 1.8.1 installed. When I run rubygems update command it does not get updated. If I try to individually run gem install json -v 1.8.3 or gem install json --platform=ruby --version=1.8.3 I get the following error.
ERROR: While executing gem ... (OptionParser::InvalidArgument)
invalid argument: -platform=ruby
C:\>gem install json --platform=ruby --version=1.8.3
Building native extensions. This could take a while...
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
C:/Ruby22-x64/bin/ruby.exe -r ./siteconf20150719-4308-1m86usl.rb extconf.rb
creating Makefile
make "DESTDIR=" clean
make "DESTDIR="
generating generator-x64-mingw32.def
compiling generator.c
make: x86_64-w64-mingw32-gcc: Command not found
make: *** [generator.o] Error 127
make failed, exit code 2
Gem files will remain installed in C:/Ruby22- x64/lib/ruby/gems/2.2.0/gems/json-1
.8.3 for inspection.
Results logged to C:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0
/json-1.8.3/gem_make.out
回答1:
Try this gem install --verbose json -v 1.8.3. This should install the gem.
回答2:
Looks like you might have the 32-bit DevKit installed instead. Try uninstalling the DevKit you have and downloading and re-installing the latest 64-bit one. For more detail check out this similar answer:
https://stackoverflow.com/a/16579088/4034665
来源：https://stackoverflow.com/questions/31498908/error-installing-json-on-windows-8-1