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Date: Tue, 05 Feb 2008 19:48:03 +0100
From: Rainer Jung <rainer.jung@kippdata.de>
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To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: mod_jk in Cygwin
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Hi Vitek,

thanks for the info. Will update our docs in the next days.

Regards,

Rainer

Vitek Cvachoucek schrieb:
> Hello Rainer
> 
> 1. /usr/sbin/apxs -q LDFLAGS outputs empty string
> 2. no there are only *.la and *.a in my /usr/lib (but there some *.so
> deeper - e.g. ruby specific under /usr/lib/ruby)
> 3. About the linking I am not sure at all. The generated file is
> rather large (682k)  however the generated *.la contains dependencies
> dependency_libs=' /usr/lib/libhttpd2core.la -L/usr/lib
> /usr/lib/libaprutil-1.la /usr/lib/libgdbm.la /usr/lib/libdb-4.2.la
> /usr/lib/libexpat.la /usr/lib/libiconv.la /usr/lib/libapr-1.la
> -lcrypt'
> 
> I am sorry I have no ldd available  neither I am sure how to install
> it, my experience with GNU build tools is extremely limited .
> The main thing for me is that the builded library actually works.
> 
> Regards
> Vitek
> 
> 
> 
> On Feb 5, 2008 6:10 PM, Rainer Jung <rainer.jung@kippdata.de> wrote:
>> Hi Vitek,
>>
>> so it's good, that it works for you. To get a more complete picture of
>> the situation (especially for our documentation), would you mind telling us:
>>
>> - what's the output of /usr/sbin/apxs -q LDFLAGS ?
>> - are there also shared libraries in /usr/lib, like libapr-1.so ?
>> - do libapr-1 and libhttpd2core really get linked in statically, or are
>> the libtool "la" files used to link them in dynamically (if you get a
>> mod_jk.so out of the process, what does ldd mod_jk.so give for
>> dependencies).
>>
>> I don't know Cygwin well enough, but I would be surprised if they
>> compiled everything statically (but hey, sometimes there *is* a surprise
>> ...).
>>
>> Regards,
>>
>> Rainer
>>
>>
>>
>> Vitek Cvachoucek wrote:
>>> Ok so I have solved it,
>>>
>>> The cookbook to compile mod_jk on Cygwin
>>>
>>>   * Download source distribution (no Cygwin binaries available)
>>>   * '''http://apache.mirror.superhosting.cz/tomcat/tomcat-connectors/jk/source/'''
>>>   * '''tomcat-connectors-1.2.26-src.tar.gz'''
>>>
>>>    wget http://apache.mirror.superhosting.cz/tomcat/tomcat-connectors/jk/source/tomcat-connectors-1.2.26-src.tar.gz
>>>    gzip -d tomcat-connectors-1.2.26-src.tar.gz
>>>    tar -xf tomcat-connectors-1.2.26-src.tar
>>>    cd tomcat-connectors-1.2.26-src/native
>>>    ./configure --with-apxs=/usr/sbin/apxs2
>>>
>>>   * Hack Makefile building Apache 2.0 module
>>>     * '''apache-2.0/Makefile'''
>>>     * target '''mod_jk.la'''
>>>     * Added statically linked libraries for '''apache2-devel, apr1,
>>> aprutil1'''
>>>
>>> mod_jk.la: mod_jk.lo $(APACHE_OBJECTS)
>>>       $(LIBTOOL) --mode=link ${COMPILE} -no-undefined `${APXS} -q LDFLAGS`
>>> -o $@ -module -rpath ${libexecdir} -avoid-version mod_jk.lo
>>> $(APACHE_OBJECTS) /usr/lib/libapr-1.la /usr/lib/libhttpd2core.la
>>> /usr/lib/libaprutil-1.la
>>>
>>>   * Now the '''make''' succeedes in creating '''mod_jk.so'''
>>>
>>>
>>> On Feb 5, 2008 10:01 AM, Vitek Cvachoucek <vitekcvachoucek@gmail.com> wrote:
>>>> I have now found a way how to get more information relating failing linkage:
>>>>
>>>> I have modified apache2.0/Makefile passing -no-undefined flag to the linker
>>>> {{{
>>>> mod_jk.la: mod_jk.lo $(APACHE_OBJECTS)
>>>>         $(LIBTOOL) --mode=link ${COMPILE} -no-undefined `${APXS} -q LDFLAGS`
>>>> -o $@ -module -shared -rpath ${libexecdir} -avoid-version
>>>>  mod_jk.lo $(APACHE_OBJECTS)
>>>> }}}
>>>>
>>>> Now I see it complains about APR libraries:
>>>>
>>>> {{{
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:2147:
>>>> undefined reference to `_apr_table_get'
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:2162:
>>>> undefined reference to `_apr_table_get'
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:2165:
>>>> undefined reference to `_ap_setup_client_block'
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:2269:
>>>> undefined reference to `_apr_table_setn'
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:2272:
>>>> undefined reference to `_apr_time_now'
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:637:
>>>> undefined reference to `_ap_get_remote_host'
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:660:
>>>> undefined reference to `_ap_get_server_name'
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:668:
>>>> undefined reference to `_ap_get_server_port'
>>>> /home/developer/tomcat-connectors-1.2.26-src/native/apache-2.0/mod_jk.c:671:
>>>> undefined reference to `_ap_get_server_description'
>>>> ....
>>>> }}}
>>>>
>>>>
>>>> However I do have apr1 and aprutil1 installed , perhaps it is again
>>>> something as weird as with WSGI compilation that required to hack
>>>> libtool as it was unable to recognize cygwin shared libraries ....
>>>>
>>>> Any ideas?
>>>>
>>>> Vitek
>>>>
>>>>
>>>> On Feb 5, 2008 7:51 AM, Vitek Cvachoucek <vitekcvachoucek@gmail.com> wrote:
>>>>> Thank you for your help,
>>>>>
>>>>> I am already using configure --with-apxs=/usr/sbin/apxs2
>>>>>
>>>>> The whole offending section is:
>>>>>
>>>>> /usr/share/apr-1-build/libtool --mode=link gcc -I/usr/include/apache2
>>>>> -g -O2 -DUSE_APACHE_MD5 -I ../common  -I c:\java\jdk1.5.0/include -I
>>>>> c:\java\jdk1.5.0/include/cygwin -DCYGWIN -O2  -DHAVE_APR
>>>>> -I/usr/include/apr-1 -I/usr/include/apr-1 -g -O2  -DCYGWIN
>>>>> `/usr/sbin/apxs2 -q LDFLAGS` -o mod_jk.la -module -rpath
>>>>> /usr/lib/apache2 -avoid-version mod_jk.lo ../common/jk_ajp12_worker.lo
>>>>> ../common/jk_connect.lo ../common/jk_msg_buff.lo ../common/jk_util.lo
>>>>> ../common/jk_ajp13.lo ../common/jk_pool.lo ../common/jk_worker.lo
>>>>> ../common/jk_ajp13_worker.lo ../common/jk_lb_worker.lo
>>>>> ../common/jk_sockbuf.lo ../common/jk_map.lo
>>>>> ../common/jk_uri_worker_map.lo ../common/jk_ajp14.lo
>>>>> ../common/jk_ajp14_worker.lo ../common/jk_md5.lo
>>>>>  ../common/jk_shm.lo ../common/jk_ajp_common.lo
>>>>> ../common/jk_context.lo ../common/jk_url.lo ../common/jk_status.lo
>>>>> libtool: link: warning: undefined symbols not allowed in
>>>>> i686-pc-cygwin shared libraries
>>>>>
>>>>> I managed to get rid of the libtool's --silent flag however no more
>>>>> information provided. Is there somebody able to pinpoint what is wrong
>>>>> with it, e.g. specific libraries it is missing (like
>>>>> c:\java\jdk1.5.0\include\cygwin which is of course wrong but perhaps
>>>>> harmless), guess the
>>>>> the build process can be confused by OS name (as Cygwin is no OS at the end).
>>>>>
>>>>> Again any help would be much appreciated.
>>>>>
>>>>> Regards
>>>>> Vitek
>>>>>
>>>>>
>>>>> On Feb 5, 2008 1:00 AM, Rainer Jung <rainer.jung@kippdata.de> wrote:
>>>>>> Unfortunately no Cygwin experience yet. If you compiled your httpd under
>>>>>> Cygwin, I expect you have a /my/path/to/httpd/bin/apxs file?
>>>>>>
>>>>>> What happens if you try
>>>>>>
>>>>>> configure --with-apxs=/my/path/to/httpd/bin/apxs
>>>>>>
>>>>>> and then make?
>>>>>>
>>>>>> Do you get the error you mentioned? Any indication, which symbols are
>>>>>> meant there ("undefined")?
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Rainer
>>>>>>
>>>>>>
>>>>>> Vitek Cvachoucek schrieb:
>>>>>>
>>>>>>> Hello gentleman,
>>>>>>>
>>>>>>> did anybody of you ever attempted to have Apache 2 on Cygwin equipped
>>>>>>> with mod_jk?
>>>>>>>
>>>>>>> The main documentation page counts Cygwin as a supported platform:
>>>>>>>
>>>>>>> http://tomcat.apache.org/connectors-doc/webserver_howto/apache.html
>>>>>>>
>>>>>>> However I have never found binary release for Cygwin. The Win32 builds
>>>>>>> do not work with Cygwin. Perhaps it would be possible to build from
>>>>>>> source on cygwin however all my attempts ended with:
>>>>>>>
>>>>>>> libtool: link: warning: undefined symbols not allowed in
>>>>>>> i686-pc-cygwin shared libraries
>>>>>>>
>>>>>>> We a complex existing Cygwin-based system (Apache, WSGI, Subversion,
>>>>>>> Trac, Ssh ...) so moving out of cygwin is not an option (while
>>>>>>> mod_proxy may be an option). Does anybody have any experience running
>>>>>>> mod_jk on Cygwin? Any help would be greatly appreciated.
>>>>>>>
>>>>>>> Vitek

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