Rails Typhoeus Curl Trouble

I'm scratching my head on this error since similar errors refer to instances of compiling libcurl from source; however, I am just simply trying to get a former rails project running on my Ubuntu 12.04.

Exception Trace from Running Rails Application Server


/var/lib/gems/1.9.1/gems/ffi-1.1.1/lib/ffi/library.rb:121:in `block in ffi_lib': Could not open library 'libcurl': libcurl: cannot open shared object file: No such file or directory. (LoadError)
Could not open library 'libcurl.so': libcurl.so: cannot open shared object file: No such file or directory
    from /var/lib/gems/1.9.1/gems/ffi-1.1.1/lib/ffi/library.rb:88:in `map'
    from /var/lib/gems/1.9.1/gems/ffi-1.1.1/lib/ffi/library.rb:88:in `ffi_lib'
    from /var/lib/gems/1.9.1/gems/typhoeus-0.4.2/lib/typhoeus/curl.rb:405:in `<module:Curl>'
    from /var/lib/gems/1.9.1/gems/typhoeus-0.4.2/lib/typhoeus/curl.rb:6:in `<module:Typhoeus>'
    from /var/lib/gems/1.9.1/gems/typhoeus-0.4.2/lib/typhoeus/curl.rb:5:in `<top (required)>'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `require'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `block in require'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:223:in `block in load_dependency'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:640:in `new_constants_in'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:223:in `load_dependency'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `require'
    from /var/lib/gems/1.9.1/gems/typhoeus-0.4.2/lib/typhoeus.rb:5:in `<top (required)>'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `require'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `block in require'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:223:in `block in load_dependency'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:640:in `new_constants_in'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:223:in `load_dependency'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `require'
    from /var/lib/gems/1.9.1/gems/panda-1.5.0/lib/panda/adapters/faraday.rb:2:in `<top (required)>'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `require'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `block in require'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:223:in `block in load_dependency'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:640:in `new_constants_in'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:223:in `load_dependency'
    from /var/lib/gems/1.9.1/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `require'
    from /var/lib/gems/1.9.1/gems/panda-1.5.0/lib/panda.rb:19:in `<top (required)>'
    from /var/lib/gems/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:68:in `require'
    from /var/lib/gems/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
    from /var/lib/gems/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:66:in `each'
    from /var/lib/gems/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:66:in `block in require'
    from /var/lib/gems/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:55:in `each'
    from /var/lib/gems/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:55:in `require'
    from /var/lib/gems/1.9.1/gems/bundler-1.2.1/lib/bundler.rb:128:in `require'

Any help or commentary is appreciated.

回答1:

Is libcurl properly installed? Typhoeus has no native extensions but it requires libcurl dynamic library (.so) since it works with the FFI library:

# from lib/typhoeus/curl.rb
ffi_lib 'libcurl'

I would say that the development files (headers) are not needed so sudo apt-get install libcurl3 should do the trick (otherwise install the devel version w/ SSL support via sudo apt-get install libcurl4-openssl-dev).

回答2:

sudo apt-get install libcurl4-openssl-dev worked for me.

回答3:

I tried adding libcurl-devel 7.57.0-1 to msys2 (on Windows) but it didn't help. (pacman -Ss libcurl showed it as installed:

msys/libcurl 7.57.0-1 (libraries) [installed]
Multi-protocol file transfer library (runtime)
msys/libcurl-devel 7.57.0-1 (development) [installed]
Libcurl headers and libraries

So for anyone having the same problem on Windows, an easy way to get around the LoadError: Could not open library 'libcurl' is to:

Take a libcurl.dll from one of the packages found here, https://curl.haxx.se/gknw.net/7.40.0/dist-w64/, and put it on the PATH.

(I just put it under \ruby24\bin\)

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