From: Robert Klemme <shortcutter@...>
Date: 2010-08-14T01:50:17+09:00
Subject: Re: libstdc++

On 13.08.2010 17:31, Pw Ktp wrote:
> Brian Candler wrote:
>> Pw Ktp wrote:
>>> linuxmce@dcerouter:/usr/lib/ruby/gems/1.8/gems$ dpkg-query -l | grep
>>> stdc
>>> ii  libstdc++5                                 1:3.3.6-15ubuntu2
>>> The GNU Standard C++ Library v3
>>> ii  libstdc++5-3.3-dev                         1:3.3.6-15ubuntu2
>>> The GNU Standard C++ Library v3 (development
>>> ii  libstdc++6                                 4.2.1-5ubuntu4
>>> The GNU Standard C++ Library v3
>>> ii  xstdcmap                                   1:1.0.1-0ubuntu2
>>> X client - xstdcmap
>>
>> If you have libstdc++6, then you should be able to install
>> libstdc++6-4.2-dev (unless you got that libstdc++6 package from
>> somewhere outside the standard Ubuntu package respositories)
>>
>> If you're not getting a mkmf.log, then perhaps it's failing building a
>> dependency. Look for the mkmf.log with the most recent timestamp
>>
>> find /var/lib/gems/1.8/gems -name mkmf.log | xargs ls -lrt
>
> anything from this>??
>
>   cat /usr/lib/ruby/gems/1.8/gems/id3lib-ruby-0.5.0/ext/mkmf.log
> have_library: checking for main() in -lstdc++... -------------------- no
>
> "cc -o conftest -I. -I/usr/lib/ruby/1.8/i486-linux -I.
> -fno-strict-aliasing -g -O2  -fPIC conftest.c  -L"." -L"/usr/lib" -L.
> -rdynamic -Wl,-export-dynamic     -lruby1.8-static -lstdc++  -lpthread
> -ldl -lcrypt -lm   -lc"
> /usr/bin/ld: cannot find -lstdc++
> 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 -O2  -fPIC conftest.c  -L"." -L"/usr/lib" -L.
> -rdynamic -Wl,-export-dynamic     -lruby1.8-static -lstdc++  -lpthread
> -ldl -lcrypt -lm   -lc"
> /usr/bin/ld: cannot find -lstdc++
> collect2: ld returned 1 exit status
> checked program was:
> /* begin */
> 1: /*top*/
> 2: int main() { return 0; }
> 3: int t() { main(); return 0; }
> /* end */
>
> --------------------
>
> linuxmce@dcerouter:/usr/lib/ruby/gems/1.8/gems$

Did you try to create a symlink from libstdc++.so -> libstdc++.6.so (or 
whatever your current version is named)?

Kind regards

	robert


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