Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
C:/RailsInstaller/Ruby2.1.0/bin/ruby.exe extconf.rb
Invalid drive specification. Unable to get ImageMagick version * 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:/RailsInstaller/Ruby2.1.0/bin/ruby
extconf failed, exit code 1
Gem files will remain installed in C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1
.0/gems/rmagick-2.15.2 for inspection.
Results logged to C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/extensions/x86
-mingw32/2.1.0/rmagick-2.15.2/gem_make.out
An error occurred while installing rmagick (2.15.2), and Bundler cannot
continue.
Make sure that gem install rmagick -v '2.15.2' succeeds before bundling.
E:\redmine-master\bin>gem install rmagick -v '2.15.2' Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... ERROR: Error installing rmagick: ERROR: Failed to build gem native extension.
C:/RailsInstaller/Ruby2.1.0/bin/ruby.exe extconf.rb
Invalid drive specification. Unable to get ImageMagick version * 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:/RailsInstaller/Ruby2.1.0/bin/ruby
extconf failed, exit code 1
Gem files will remain installed in C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1 .0/gems/rmagick-2.15.2 for inspection. Results logged to C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/extensions/x86 -mingw32/2.1.0/rmagick-2.15.2/gem_make.out
