From: Eric Hodel <drbrain@...7.net>
Date: 2009-04-08T07:23:52+09:00
Subject: Re: extremely hard to install rubygems on hpux

On Apr 7, 2009, at 06:50, Jun Young Kim wrote:
> 2009. 04. 07, ¿ÀÈÄ 10:16, Jun Young Kim ÀÛ¼º:
>> hi, all.
>>
>> after installing ruby 1.8.7.p72 successfully, I tried to install  
>> rubygems.1.3.1.
>>
>> It seems to be normally installed.
>>
>> but, when I execute it, the errors is generated.
>>
>> first error log is "no load error - zlib".
>>
>> to resolve this problem, I trace the zlib location ruby wants. the  
>> one of them is "/usr/local/lib/ruby/site_ruby/1.8/ia64-hpux11.31"  
>> here.
>>
>> I make a symbolic link by using /usr/local/lib/libz.so.1.2.3 under  
>> site_ruby/1.8/ia.......
>>

This won't work as /usr/local/lib/libz.so is not a ruby extension.   
The ruby zlib extensions loads this file.

>> this time ruby cannot find "zlib.rb". I am not sure this is main  
>> reason gem is failed. but it could be a reason.
>>
>> the procedure to execute gem binary is extremely hard.  :-<
>
> this is mkkf.log in ruby1.8.7p72/ext/zlib.
>
> -------------------------------------
>
> have_library: checking for deflateReset() in -lz...  
> -------------------- yes
>
> "gcc -o conftest -I../.. -I../../. -I../.././ext/zlib  - 
> D_FILE_OFFSET_BITS=64  -g -O2   conftest.c  -L. -L../.. -L.      - 
> lruby-static -lz  -lpthread -ldld -ldl -lm   -lc"
> conftest.c: In function 't':
> conftest.c:3: error: 'deflateReset' undeclared (first use in this  
> function)
> conftest.c:3: error: (Each undeclared identifier is reported only once
> conftest.c:3: error: for each function it appears in.)
> checked program was:
> /* begin */
> 1: /*top*/
> 2: int main() { return 0; }
> 3: int t() { void ((*volatile p)()); p = (void ((*)()))deflateReset;  
> return 0; }
> /* end */
>
> "gcc -o conftest -I../.. -I../../. -I../.././ext/zlib  - 
> D_FILE_OFFSET_BITS=64  -g -O2   conftest.c  -L. -L../.. -L.      - 
> lruby-static -lz  -lpthread -ldld -ldl -lm   -lc"
> checked program was:
> /* begin */
> 1: /*top*/
> 2: int main() { return 0; }
> 3: int t() { deflateReset(); return 0; }
> /* end */
>
> --------------------
>
> have_header: checking for zlib.h... -------------------- yes
>
> "gcc -E -I../.. -I../../. -I../.././ext/zlib  - 
> D_FILE_OFFSET_BITS=64  -g -O2    conftest.c -o conftest.i"
> checked program was:
> /* begin */
> 1: #include <zlib.h>
> /* end */
>
> --------------------
>
>
> hmn, could be this a kind of clue ?

These are both ok (in the first instance, deflateReset is probably a  
macro).

Did you get a zlib.so built?  In your ruby checkout:

$ find .ext -name "*zlib*"

If you didn't include your entire mkmf.log