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POtesseract gem won't compile in Ruby
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  1. POtesseract gem won't compile in Ruby
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    copied!<p>Total noob here, but can't figure out how to get past this error. I'm hoping to install and run the 'tesseract' gem on my Linux server running Centos 6. The upshot seems to be that -ltesseract should be in /usr/bin/ld, but isn't ...</p> <p>I've read through the other tesseract / Ruby issues posted, but I don't think I have any of those problems.</p> <p>Any help is much appreciated.</p> <hr> <p><strong>Error message</strong></p> <pre><code>g++ -shared -fPIC -o /tmp/.ffi-inline-0/3751549a49315e9a7703c6e20a39e587297ce8a8.so /tmp/.ffi-inline-0/3751549a49315e9a7703c6e20a39e587297ce8a8.cpp -ltesseract 2&gt;&gt;/tmp/.ffi-inline-0/3751549a49315e9a7703c6e20a39e587297ce8a8.log /usr/bin/ld: cannot find -ltesseract collect2: ld returned 1 exit status </code></pre> <p><strong>Error in action</strong></p> <pre><code>[x@y ~]# irb 1.9.3-p327 :001 &gt; require 'tesseract' CompilationError: compile error: see logs at /tmp/.ffi-inline-0/3751549a49315e9a7703c6e20a39e587297ce8a8.log from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/ffi-inline-0.0.4.2/lib/ffi/inline/compilers/gcc.rb:31:in `compile' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/ffi-inline-0.0.4.2/lib/ffi/inline/builders/c.rb:114:in `shared_object' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/ffi-inline-0.0.4.2/lib/ffi/inline/builders.rb:90:in `block in build' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/ffi-inline-0.0.4.2/lib/ffi/inline/builders.rb:87:in `instance_eval' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/ffi-inline-0.0.4.2/lib/ffi/inline/builders.rb:87:in `build' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/ffi-inline-0.0.4.2/lib/ffi/inline/inline.rb:54:in `singleton_inline' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/ffi-inline-0.0.4.2/lib/ffi/inline/inline.rb:39:in `inline' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/tesseract-ocr-0.1.5/lib/tesseract/c.rb:34:in `&lt;module:C&gt;' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/tesseract-ocr-0.1.5/lib/tesseract/c.rb:31:in `&lt;module:Tesseract&gt;' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/tesseract-ocr-0.1.5/lib/tesseract/c.rb:29:in `&lt;top (required)&gt;' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/tesseract-ocr-0.1.5/lib/tesseract/api.rb:26:in `&lt;top (required)&gt;' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/tesseract-ocr-0.1.5/lib/tesseract-ocr.rb:35:in `&lt;top (required)&gt;' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/local/rvm/gems/ruby-1.9.3-p327/gems/tesseract-ocr-0.1.5/lib/tesseract.rb:25:in `&lt;top (required)&gt;' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require' from /usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require' from (irb):1 from /usr/local/rvm/rubies/ruby-1.9.3-p327/bin/irb:13:in `&lt;main&gt;'1.9.3-p327 </code></pre> <p><strong>Gem version</strong></p> <pre><code>[x@y ~]# gem list [...] tesseract-ocr (0.1.5) [...] </code></pre> <p><strong>GCC version</strong></p> <pre><code>[x@y ~]# gcc --version gcc (GCC) 4.4.6 20120305 (Red Hat 4.4.6-4) [...] </code></pre> <p><strong>OS</strong></p> <pre><code>[x@y ~]# cat /etc/*release* CentOS release 6.3 (Final) </code></pre> <p><strong>Ruby version</strong></p> <pre><code>[x@y ~]# ruby -v ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-linux] </code></pre> <p><strong>RVM Version</strong> (just in case it matters)</p> <pre><code>[x@y ~]# rvm -v rvm 1.17.2 (stable) by Wayne E. Seguin &lt;wayneeseguin@gmail.com&gt;, Michal Papis &lt;mpapis@gmail.com&gt; [https://rvm.io/] </code></pre>
 

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