From: "Douglas A. Seifert" <doug@...>
Date: 2008-07-19T11:02:38+09:00
Subject: Re: compile from source - how difficult?

Tom Cloyd wrote:
> Martin DeMello wrote:
>> On Fri, Jul 18, 2008 at 3:34 PM, Tom Cloyd <tomcloyd@comcast.net> wrote:
>>> On a fresh install of Kubuntu Linux (ver. 8.04.01), I'm not having 
>>> good day
>>> trying to get ruby and rubygems back and functional.
>>
>> I got webby installed under Ubuntu 8.04 without having to compile
>> anything from source. I did face some other issues, though - see
>> http://markmail.org/message/apqjib2ftfr5dukk
>>
>> Since your immediate problem appears to be pthreads-related, see if
>> you have the following installed:
>>
>> libpthread-stubs0
>> libpthread-stubs0-dev
>>
>> martin
>>
>>
>
> Here's what's installed, apparently -
>
> $ locate libpthread
> /lib/libpthread-2.7.so
> /lib/libpthread.so.0
> /lib/tls/i686/cmov/libpthread-2.7.so
> /lib/tls/i686/cmov/libpthread.so.0
>
> So, I went to Adept and found the two things (packages? modules? I 
> haven't a clue) an installed them.
>
> Then...
>
> $ sudo gem install webby
> [sudo] password for tomc:
> Building native extensions.  This could take a while...
> ERROR:  Error installing webby:
>         ERROR: Failed to build gem native extension.
>
> /usr/bin/ruby1.8 extconf.rb install webby
> checking for main() in -lpthread... no
> *** extconf.rb failed ***
> Could not create Makefile due to some reason, probably lack of
> necessary libraries and/or headers.  Check the mkmf.log file for more
> details.  You may need configuration options.
>
> Provided configuration options:
>         --with-opt-dir
>         --without-opt-dir
>         --with-opt-include
>         --without-opt-include=${opt-dir}/include
>         --with-opt-lib
>         --without-opt-lib=${opt-dir}/lib
>         --with-make-prog
>         --without-make-prog
>         --srcdir=.
>         --curdir
>         --ruby=/usr/bin/ruby1.8
>         --with-pthreadlib
>         --without-pthreadlib
>
>
> Gem files will remain installed in 
> /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.0 for inspection.
> Results logged to 
> /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.0/ext/gem_make.out
>
>
> This was what was happening before.
>
> Checking the mkmf.log file mentioned above, I find:
>
> have_library: checking for main() in -lpthread... -------------------- no
>
> "cc -o conftest -I. -I/usr/lib/ruby/1.8/i486-linux -I. 
> -fno-strict-aliasing -g -g -O2  -fPIC conftest.c  -L"." -L"/usr/lib" 
> -L. -Wl,-Bsymbolic-functions -rdynamic -Wl,-export-dynamic 
> -lruby1.8-static -lpthread  -lpthread -ldl -lcrypt -lm   -lc"
> /usr/bin/ld: crt1.o: No such file: No such file or directory
> collect2: ld returned 1 exit status
> checked program was:
> /* begin */
> 1: /*top*/
> 2: int main() { return 0; }
> 3: int t() { void ((*volatile p)()); p = (void ((*)()))main; return 0; }
> /* end */
>
> "cc -o conftest -I. -I/usr/lib/ruby/1.8/i486-linux -I. 
> -fno-strict-aliasing -g -g -O2  -fPIC conftest.c  -L"." -L"/usr/lib" 
> -L. -Wl,-Bsymbolic-functions -rdynamic -Wl,-export-dynamic 
> -lruby1.8-static -lpthread  -lpthread -ldl -lcrypt -lm   -lc"
> /usr/bin/ld: crt1.o: No such file: No such file or directory
> collect2: ld returned 1 exit status
> checked program was:
> /* begin */
> 1: /*top*/
> 2: int main() { return 0; }
> 3: int t() { main(); return 0; }
> /* end */
>
> --------------------
>
> Then, checking 
> /usr/lib/ruby/gems/1.8/gems/eventmachine-0.12.0/ext/gem_make.out 
> (mentioned in the webby install effort console output, above), I find 
> simply a repetition of the error output printed to the console as a 
> result of the webby install attempt.
>
> Sadly, I cannot make sense of any of this, so I'm very open to 
> suggestions at this point.
>
> Thanks!
>
> t.
On ubuntu, to compile anything, you should install the build-essential 
package:

$ sudo apt-get install build-essential

You may also have to install the ruby1.8-dev package as well:

$ sudo apt-get install ruby1.8-dev

Good luck.  When compiling gems, you usually will need dev version of 
any library that the gem has a dependency on.

-Doug Seifert