error installing caldecott

问题

recently i made web application and want to atatch my database with it ..though i followed steps of doing it but still i am getting error ..i dont know where's problem i did in steps .. please let me know where i am wrong

please help me where i am wrong or what i skipped .. thankyou..

回答1:

I had problems install caldecott , i got the

ERROR:  Error installing caldecott:
        ERROR: Failed to build gem native extension.

        "C:/Program Files/ruby-1.9.2/bin/ruby.exe" extconf.rb
*** extconf.rb failed ***

error :

i found this resource : http://www.clausconrad.com/blog/installing-caldecott-on-windows

which was helpfull but my problem was i had multiple ruby installations on my system !

so make sure you are using the right ruby installation and delete the others if needed : i had :

C:/Program Files/ruby-1.9.2/bin/ruby.exe

and

C:\Ruby193\bin\ruby.exe

i deleted the first one and everything went fine , be sure to install the devkit like the link says , and everything should be allright.

回答2:

There's an issue installing eventmachine on Windows. Try this instead:

gem install eventmachine --pre
gem install caldecott

回答3:

To install Caldecott requires Ruby 1.9.2. Check version by

ruby -v

if not 1.9 update the version and re try to install

回答4:

first make sure that you installed C compiler in your local computer...
if you are using Linux you can run the following command:

sudo apt-get install g++

if you are in windows you will have find a C compiler from the net.
After installing this C compiler, you can now run

 sudo gem install caldecott

If this is not working, try

ruby -v

to see if the version is 1.9.3 or above....

then repeat

hope that helps

来源：https://stackoverflow.com/questions/10740541/error-installing-caldecott