# Trouble setting LD\_LIBRARY\_PATH for FastCGI script **URL:** \ **Category:** Ruby\ **Created:** [July 20, 2006, 8:56pm UTC](https://www.ruby-forum.com/t/trouble-setting-ld-library-path-for-fastcgi-script/99180 "2006-07-20T20:56:59Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Chris\_Gansen](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/b77776/32.png) [@Chris\_Gansen](https://www.ruby-forum.com/u/Chris_Gansen)\ **Post date:** [July 20, 2006, 8:56pm UTC](https://www.ruby-forum.com/t/trouble-setting-ld-library-path-for-fastcgi-script/99180/1 "2006-07-20T20:56:59Z")
Hello - I’m trying to exec a ruby script via FastCGI (on Apache 2.0), and cannot properly set the env. variable LD\_LIBRARY\_PATH at run time. I’ve tried adding: SetEnv LD\_LIBRARY\_PATH /path/to/lib in a .htaccess file, but to no avail. Perl, however, happily recognizes it. Setting ENV[‘LD\_LIBRARY\_PATH’] does not take effect either. In the error\_log, I see: [Thu Jul 20 11:32:33 2006] [warn] FastCGI: (dynamic) server “/web/server\_root/fcgi-bin/index.fcgi” restarted (pid 11242) /path/to/ruby\_bin/lib/ruby/site\_ruby/1.8/i686-linux/fcgi.so: libfcgi.so.0: cannot open shared object file: No such file or directory - /path/to/ruby\_bin/lib/ruby/site\_ruby/1.8/i686-linux/fcgi.so (LoadError) from /path/to/ruby\_bin/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:21:in `require’ from /path/to/index.fcgi:23 Strangely, when I execute the fcgi script from the command line, as: $ LD\_LIBRARY\_PATH=/path/to/lib ./index/fcgi I receive: ./index.fcgi:25: undefined method `each\_cgi’ for FCGI:Class (NoMethodError) Which is particularly vexing. This configuration works on another machine, where the libraries are not in ‘special’ places. Any advice on how to get Ruby to find the correct library? -c- ---
**Author:** ![Chris\_Gansen](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/b77776/32.png) [@Chris\_Gansen](https://www.ruby-forum.com/u/Chris_Gansen)\ **Post date:** [July 20, 2006, 9:52pm UTC](https://www.ruby-forum.com/t/trouble-setting-ld-library-path-for-fastcgi-script/99180/2 "2006-07-20T21:52:27Z")
Chris Gansen writes: > Hello - > > I’m trying to exec a ruby script via FastCGI (on Apache 2.0), and > cannot > properly set the env. variable LD\_LIBRARY\_PATH at run time. > > I’ve tried adding: > > SetEnv LD\_LIBRARY\_PATH /path/to/lib > > in a .htaccess file, but to no avail. Perl, however, happily > recognizes it. > Setting ENV[‘LD\_LIBRARY\_PATH’] does not take effect either. I set this in Apache’s httpd.conf file, in the declaration. You will also want to make sure you declare all the libraries needed. If you just declare “/path/to/lib”, the libraries wouldn’t necessarily know where to find libraries in /usr/lib, for example. Here is the line I used (on my Solaris system): SetEnv LD\_LIBRARY\_PATH /usr/lib:/usr/local/lib:/usr/openwin/lib:/usr/local/pgsql/lib (Probably don’t really need the /usr/openwin/lib, but…) You would have to restart Apache, but I expect you would have to do that anyways if one could set the same thing in the .htaccess. > In the error\_log, I see: > > [Thu Jul 20 11:32:33 2006] [warn] FastCGI: (dynamic) server > “/web/server\_root/fcgi-bin/index.fcgi” restarted (pid 11242) > /path/to/ruby\_bin/lib/ruby/site\_ruby/1.8/i686-linux/fcgi.so: > libfcgi.so.0: > cannot open shared object file: No such file or directory - > /path/to/ruby\_bin/lib/ruby/site\_ruby/1.8/i686-linux/fcgi.so > (LoadError) > from /path/to/ruby\_bin/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:21:in > `require’ > from /path/to/index.fcgi:23 > > Strangely, when I execute the fcgi script from the command line, as: > > $ LD\_LIBRARY\_PATH=/path/to/lib ./index/fcgi > > I receive: > > ./index.fcgi:25: undefined method `each\_cgi’ for FCGI:Class > (NoMethodError) > > Which is particularly vexing. This configuration works on another > machine, > where the libraries are not in ‘special’ places. > > Any advice on how to get Ruby to find the correct library? > > -c- Are you sure you’ve installed FastCGI on this system? Based on what I see in the log file: 1. The server cannot find libfcgi.so.0, which is installed with FastCGI. Make sure the file is present. 2. You’ve probably installed ruby-fcgi since it knew about FCGI:Class, but the fcgi.so file would require the libfcgi.so library. Did you copy the ruby libraries over, but not the system libraries? Coey – Coey M. Senior Test Engineer (651) 628-2831 removed\_email\_address@domain.invalid Secure Computing(R) Securing Connections between People, Applications, and Networks™ [http://www.securecomputing.com](http://www.securecomputing.com) NASDAQ: SCUR \*\*\* The information contained in this email message may be privileged, confidential and protected from disclosure. If you are not the intended recipient, any review, dissemination, distribution or copying is strictly prohibited. If you have received this email message in error, please notify the sender by reply email and delete the message and any attachments. \*\*\* ---
**Author:** ![Chris\_Gansen](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/b77776/32.png) [@Chris\_Gansen](https://www.ruby-forum.com/u/Chris_Gansen)\ **Post date:** [July 20, 2006, 10:30pm UTC](https://www.ruby-forum.com/t/trouble-setting-ld-library-path-for-fastcgi-script/99180/3 "2006-07-20T22:30:46Z")
On 7/20/06, Coey M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I set this in Apache’s httpd.conf file, in the > declaration. You will also want to make sure you declare all the > libraries needed. If you just declare “/path/to/lib”, the libraries > wouldn’t necessarily know where to find libraries in /usr/lib, for > example. Here is the line I used (on my Solaris system): > SetEnv LD\_LIBRARY\_PATH > /usr/lib:/usr/local/lib:/usr/openwin/lib:/usr/local/pgsql/lib Unfortunately, I’m in a very restrictive environment, for multiple reasons. There are no vhosts, and custom configuration directives must either be in .htaccess or a stanza. It’s my understanding that .htaccess would have the same effect as setting it in , though. Furthermore, when I run a Perl fcgi script to dump $ENV, I see the SetEnv value: LD\_LIBRARY\_PATH =\> /path/to/fcgi\_bin/lib > see in the log file: > > 1. The server cannot find libfcgi.so.0, which is installed with > FastCGI. Make sure the file is present. > 2. You’ve probably installed ruby-fcgi since it knew about > FCGI:Class, but the fcgi.so file would require the libfcgi.so library. > Did you copy the ruby libraries over, but not the system libraries? FastCGI is installed, but not in the typical fashion. I have the FastCGI libraries, libfcgi.so.0, etc installed in a user directory, which is why I’m trying to set LD\_LIBRARY\_PATH, so Ruby will look for the libraries in the right place. And no, I cannot install into the system library (/usr/lib). Thanks for the help, –chris