# Fastthread error **URL:** \ **Category:** Mongrel\ **Created:** [February 10, 2009, 2:07pm UTC](https://www.ruby-forum.com/t/fastthread-error/159968 "2009-02-10T14:07:54Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![leojoesdb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/779978/32.png) [@leojoesdb](https://www.ruby-forum.com/u/leojoesdb)\ **Post date:** [February 10, 2009, 2:07pm UTC](https://www.ruby-forum.com/t/fastthread-error/159968/1 "2009-02-10T14:07:54Z")
Is anybody testing mongrel on ruby 1.9.1 I just tried installing mongrel and got this error [root@mysql02 fastthread-1.0.1]# gem install mongrel Building native extensions. This could take a while… /usr/local/lib/ruby/1.9.1/rubygems/ext/builder.rb:48: warning: Insecure world writable dir /bin in PATH, mode 040777 ERROR: Error installing mongrel: ERROR: Failed to build gem native extension. /usr/local/bin/ruby extconf.rb install mongrel creating Makefile make gcc -I. -I/usr/local/include/ruby-1.9.1/i686-linux -I/usr/local/include/ruby-1.9.1/ruby/backward -I/usr/local/include/ruby-1.9.1 -I. -D\_FILE\_OFFSET\_BITS=64 -fPIC -O2 -g -Wall -Wno-parentheses -o fastthread.o -c fastthread.c fastthread.c:13:20: error: intern.h: No such file or directory In file included from fastthread.c:14: /usr/local/include/ruby-1.9.1/ruby/backward/rubysig.h:14:2: warning: #warning rubysig.h is obsolete fastthread.c:349: error: static declaration of ‘rb\_mutex\_locked\_p’ follows non-static declaration /usr/local/include/ruby-1.9.1/ruby/intern.h:707: error: previous declaration of ‘rb\_mutex\_locked\_p’ was here fastthread.c:366: error: static declaration of ‘rb\_mutex\_try\_lock’ follows non-static declaration /usr/local/include/ruby-1.9.1/ruby/intern.h:708: error: previous declaration of ‘rb\_mutex\_try\_lock’ was here fastthread.c: In function ‘lock\_mutex’: fastthread.c:392: error: ‘rb\_thread\_critical’ undeclared (first use in this function) fastthread.c:392: error: (Each undeclared identifier is reported only once fastthread.c:392: error: for each function it appears in.) fastthread.c: At top level: fastthread.c:406: error: static declaration of ‘rb\_mutex\_lock’ follows non-static declaration /usr/local/include/ruby-1.9.1/ruby/intern.h:709: error: previous declaration of ‘rb\_mutex\_lock’ was here fastthread.c: In function ‘set\_critical’: fastthread.c:438: error: ‘rb\_thread\_critical’ undeclared (first use in this function) fastthread.c: In function ‘unlock\_mutex’: fastthread.c:447: error: ‘rb\_thread\_critical’ undeclared (first use in this function) fastthread.c: At top level: fastthread.c:463: error: static declaration of ‘rb\_mutex\_unlock’ follows non-static declaration /usr/local/include/ruby-1.9.1/ruby/intern.h:710: error: previous declaration of ‘rb\_mutex\_unlock’ was here fastthread.c: In function ‘rb\_mutex\_exclusive\_unlock’: fastthread.c:499: error: ‘rb\_thread\_critical’ undeclared (first use in this function) fastthread.c: At top level: fastthread.c:524: error: conflicting types for ‘rb\_mutex\_synchronize’ /usr/local/include/ruby-1.9.1/ruby/intern.h:712: error: previous declaration of ‘rb\_mutex\_synchronize’ was here fastthread.c: In function ‘wait\_condvar’: fastthread.c:620: error: ‘rb\_thread\_critical’ undeclared (first use in this function) fastthread.c:626: warning: passing argument 1 of ‘rb\_ensure’ from incompatible pointer type fastthread.c: In function ‘rb\_condvar\_broadcast’: fastthread.c:684: error: ‘rb\_thread\_critical’ undeclared (first use in this function) fastthread.c: In function ‘signal\_condvar’: fastthread.c:703: error: ‘rb\_thread\_critical’ undeclared (first use in this function) fastthread.c: In function ‘rb\_queue\_marshal\_load’: fastthread.c:824: error: ‘struct RArray’ has no member named ‘len’ fastthread.c:828: error: ‘struct RArray’ has no member named ‘ptr’ fastthread.c:828: error: ‘struct RArray’ has no member named ‘len’ fastthread.c: In function ‘Init\_fastthread’: fastthread.c:1182: error: ‘rb\_thread\_critical’ undeclared (first use in this function) make: \*\*\* [fastthread.o] Error 1 Gem files will remain installed in /usr/local/lib/ruby/gems/1.9.1/gems/fastthread-1.0.1 for inspection. Results logged to /usr/local/lib/ruby/gems/1.9.1/gems/fastthread-1.0.1/ext/fastthread/gem\_make.out ---
**Author:** ![leojoesdb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/779978/32.png) [@leojoesdb](https://www.ruby-forum.com/u/leojoesdb)\ **Post date:** [February 10, 2009, 3:13pm UTC](https://www.ruby-forum.com/t/fastthread-error/159968/2 "2009-02-10T15:13:30Z")
Currently fastthread needs to be patched by hand to make it work with ruby 1.9. You can read about how to patch it for instance here: > **[Getting ready for Ruby 1.9.1](https://old.blog.phusion.nl/2009/02/02/getting-ready-for-ruby-191/)** > > We are excited about Ruby 1.9.1. Of course, with all the performance improvements, who wouldn’t be? Unfortunately a large number of Ruby libraries and extensions still don’t work on 1.9… There are still a lot of gems that are not 1.9 ready, you might find some useful resource here: Cheers, Luis Landeiro R.