# Ruby header for tioga (missing)

**URL:** <https://www.ruby-forum.com/t/ruby-header-for-tioga-missing/143287>\
**Category:** Ruby\
**Created:** [July 17, 2008, 12:06am UTC](https://www.ruby-forum.com/t/ruby-header-for-tioga-missing/143287 "2008-07-17T00:06:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![fiocco](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/2acd7d/32.png) [@fiocco](https://www.ruby-forum.com/u/fiocco)\
**Post date:** [July 17, 2008, 12:06am UTC](https://www.ruby-forum.com/t/ruby-header-for-tioga-missing/143287/1 "2008-07-17T00:06:24Z")

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## Hello everybody, I am trying to compile the tioga application for ruby, but get the following message

checking for zlib.h… yes  
checking for compress() in -lz… yes  
checking for ieee754.h… no  
You lack the ieee754.h header file, which might mean lower reliability  
when Marshalling Dvectors and Dtables  
checking for isnan() … no  
MacOS specific installation  
Writing Makefile

* * *

So I apprently miss the ieee754.h header.  
I have looked for the file and copied it from somewhere on the net  
inside a coupl of folders where other header files _seem_ to be in the  
tioga distribution but not in the ruby lib  
/usr/lib/ruby/  
cause I cannot find other headers over there.  
And I still get the same error.  
Anybody familiar with this problem and can tell me where to place the  
header/how to recompile/whatever?  
Thank you very much!  
f.