# Seg fault when building ruby 1.8.6-p111 on MacOS X 10.5 **URL:** \ **Category:** Ruby\ **Created:** [November 1, 2007, 11:08pm UTC](https://www.ruby-forum.com/t/seg-fault-when-building-ruby-1-8-6-p111-on-macos-x-10-5/118987 "2007-11-01T23:08:23Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![mslagell](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e274bd/32.png) [@mslagell](https://www.ruby-forum.com/u/mslagell)\ **Post date:** [November 1, 2007, 11:08pm UTC](https://www.ruby-forum.com/t/seg-fault-when-building-ruby-1-8-6-p111-on-macos-x-10-5/118987/1 "2007-11-01T23:08:23Z")
I’m getting a segmentation fault when building ruby 1.8.6-p111 (from source and by itself, not as part of a larger distribution). I’m running on a clean version of MacOS X 10.5 and a new build of readline 5.2 installed in /usr/local. My configure line is: ./configure --prefix=/usr/local/ruby --with- readline-dir=/usr/local/readline --enable-pthread There weren’t any issues that I could see during the configure process and the make process looked fine right up until the segmentation fault. Here’s where it ended: gcc -g -O2 -pipe -fno-common -DRUBY\_EXPORT -I. -I. -c time.c gcc -g -O2 -pipe -fno-common -DRUBY\_EXPORT -I. -I. -c util.c gcc -g -O2 -pipe -fno-common -DRUBY\_EXPORT -I. -I. -c variable.c gcc -g -O2 -pipe -fno-common -DRUBY\_EXPORT -I. -I. -c version.c gcc -g -O2 -pipe -fno-common -DRUBY\_EXPORT -I. -I. -c dmyext.c ar rcu libruby-static.a array.o bignum.o class.o compar.o dir.o dln.o enum.o error.o eval.o file.o gc.o hash.o inits.o io.o marshal.o math.o numeric.o object.o pack.o parse.o process.o prec.o random.o range.o re.o regex.o ruby.o signal.o sprintf.o st.o string.o struct.o time.o util.o variable.o version.o dmyext.o gcc -g -O2 -pipe -fno-common -DRUBY\_EXPORT -I. -I. -c main.c gcc -g -O2 -pipe -fno-common -DRUBY\_EXPORT -I. -I. -c dmydln.c gcc -g -O2 -pipe -fno-common -DRUBY\_EXPORT -L. main.o dmydln.o libruby-static.a -lpthread -ldl -lobjc -o miniruby ruby: [BUG] Segmentation fault ruby 1.8.6 (2007-09-24) [i686-darwin9.0.0] make: \*\*\* [.rbconfig.time] Abort trap Has anyone else run into this and maybe found a solution? Thanks! Mark ---
**Author:** ![mslagell](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e274bd/32.png) [@mslagell](https://www.ruby-forum.com/u/mslagell)\ **Post date:** [November 1, 2007, 11:48pm UTC](https://www.ruby-forum.com/t/seg-fault-when-building-ruby-1-8-6-p111-on-macos-x-10-5/118987/2 "2007-11-01T23:48:48Z")
Interestingly, I’m getting the same problem when building ruby 1.8.6- p110 and ruby 1.8.6-p36… the latter being the same version that is include in the shipping OS! I’ve found many references to this issue, but never any explanation for what causes it, let alone a solution to fixing it. Mark ---
**Author:** ![mslagell](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e274bd/32.png) [@mslagell](https://www.ruby-forum.com/u/mslagell)\ **Post date:** [November 2, 2007, 1:47am UTC](https://www.ruby-forum.com/t/seg-fault-when-building-ruby-1-8-6-p111-on-macos-x-10-5/118987/3 "2007-11-02T01:47:59Z")
So I was able to get ruby to compile by removing the --enable-pthread option. I’m not sure why that was needed though, since I’ve always used it before. I did see a reference to ruby not liking pthread enabled if tcl/tk’s pthread was disabled, but that there was a warning mechanism in place to handle that. I’m going to try building my own version of tcl/tk and seeing if I can get things to be happy again with pthread, but if anyone knows a different way of fixing things up, I’d really appreciate it. Mark ---
**Author:** ![mslagell](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e274bd/32.png) [@mslagell](https://www.ruby-forum.com/u/mslagell)\ **Post date:** [November 2, 2007, 3:10am UTC](https://www.ruby-forum.com/t/seg-fault-when-building-ruby-1-8-6-p111-on-macos-x-10-5/118987/4 "2007-11-02T03:10:24Z")
Laurent has already explained why this is and provides patches. Which already have been committed to macports. FMI see … [http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/12895](http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/12895) ---
**Author:** ![mslagell](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e274bd/32.png) [@mslagell](https://www.ruby-forum.com/u/mslagell)\ **Post date:** [November 2, 2007, 2:06am UTC](https://www.ruby-forum.com/t/seg-fault-when-building-ruby-1-8-6-p111-on-macos-x-10-5/118987/5 "2007-11-02T02:06:42Z")
What type of performance does pthread offer when it is enabled? -Ron