From: Yutaka Kanemoto Date: 2009-05-06T00:14:20+09:00 Subject: Re: which version is the most stable thing for AIX platform? Hi, I think core team do not have AIX. So, if we (AIX users) want to use ruby on AIX, we need to solve issues by ourselves. This is just my thought. Anyway, I can not recreate your issue. Here is some output from my machine: % ruby -v ruby 1.8.7 (2009-04-08 patchlevel 160) [powerpc-aix5.3.0.0] % gem --version 1.3.3 % gem install treetop Successfully installed polyglot-0.2.5 Successfully installed treetop-1.2.5 2 gems installed Installing ri documentation for polyglot-0.2.5... Installing ri documentation for treetop-1.2.5... Installing RDoc documentation for polyglot-0.2.5... Installing RDoc documentation for treetop-1.2.5... I have not used treetop so far, but I just tried to install. I'm not sure if I can help you, I can tell you the difference of environment. What kind of compilers( and its versions) did you use to build ruby? What options did you use when you built ruby? I use xlc 9/gcc 4.2.3, and use --enable-shared and --prefix By the way, what is zlib problems? -- Yutaka KANEMOTO http://d.hatena.ne.jp/kinpoco/