# Compiling Ruby 1.9.1 on AIX 5.3

**URL:** <https://www.ruby-forum.com/t/compiling-ruby-1-9-1-on-aix-5-3/180075>\
**Category:** Ruby\
**Created:** [December 10, 2009, 11:34pm UTC](https://www.ruby-forum.com/t/compiling-ruby-1-9-1-on-aix-5-3/180075 "2009-12-10T23:34:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rbaibich](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/41988e/32.png) [@rbaibich](https://www.ruby-forum.com/u/rbaibich)\
**Post date:** [December 10, 2009, 11:34pm UTC](https://www.ruby-forum.com/t/compiling-ruby-1-9-1-on-aix-5-3/180075/1 "2009-12-10T23:34:40Z")

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Hello,

Running the Ruby configure on AIX returns the following error:

checking for size\_t… yes  
checking size of size\_t… configure: error: in `/ruby-1.9.1-p376’:  
configure: error: cannot compute sizeof (size\_t)

Any ideas?