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My env:rvm ruby 1.9.2 , and I build ImageMagick 6.7.4-6 from source.
When I install rmagick, it says:
/home/rocky/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:368:in `try_do’: The complier failed to generate an executable file. (RuntimeError)
You have to install development tools first.
However, I also have ruby 1.8.7 in my rvm, and the rmagick can be installed correctly in 1.8.7. So I’m very confused what I missed in 1.9.2.
Thanks to Michael’s answer, the key is to configure ImageMagick with this: