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2008 Jun 06 - Fri

Wt, Some Build Modifications

Back on 2007/10/03, I wrote about installing Wt (a C++ library and application server for developing and deploying web applications) on a Debian server. I've revised things a little bit since thing while building Wt v2.1.3.

In this case, I build with the newly released version of the Boost libraries: 1.35. ASIO is now included in Boost, so some build steps can be removed.

Prerequisites are little changed but for a different library for gd:

apt-get install gcc
apt-get install zlib1g
apt-get install zlib1g-dev
apt-get install libbz2-dev
apt-get install libgd2-noxpm-dev
apt-get install cmake
apt-get install libfcgi-dev
apt-get install libapache2-mod-fastcgi
apt-get install libssl-dev

The web site and repository for Wt have changed, so CVS commands will be a bit different:

cvs -d :pserver:anonymous@cvs.webtoolkit.eu/opt/cvs login
cvs -z3 -d :pserver:anonymous@cvs.webtoolkit.eu/opt/cvs co wt

I've changed the cmake/build a little bit so the results go into /usr/local/wt/include and /usr/local/wt/lib:

cmake -D DEPLOYROOT=/var/www/wt -D WEBUSER=www-data -D WEBGROUP=www-data \
-D BOOST_DIR=/usr/local \
-D BOOST_COMPILER=gcc42 \
-D BOOST_VERSION=1_35 \
-D BOOST_INCLUDE_DIR=/usr/local/include/boost \
-D BOOST_LIB_DIR=/usr/local  \
-D BOOST_DT_LIB_MT=/usr/local/lib \
-D BOOST_DT_LIB=/usr/local/lib \
-D BOOST_FS_LIB=/usr/local/lib \
-D BOOST_FS_LIB_MT=/usr/local/lib \
-D BOOST_PO_LIB_MT=/usr/local/lib \
-D BOOST_REGEX_LIB_MT=/usr/local/lib \
-D BOOST_SIGNALS_LIB_MT=/usr/local/lib \
-D BOOST_THREAD_LIB=/usr/local/lib \
-D BOOST_ASIO_INCLUDE_DIR=/usr/local/include/boost  \
-D SHARED_LIBS=ON \
-D CONNECTOR_FCGI=OFF \
-D CONNECTOR_HTTP=ON \
-D EXAMPLES_CONNECTOR=wthttp \
-D WTHTTP_CONFIGURATION=/etc/wt/wthttpd \
-D CONFIGURATION=/etc/wt/wt_config.xml \
-D CMAKE_INSTALL_PREFIX=/usr/local/wt \
.

During make install, an error regarding CMakeFiles arises. The secret, that I know, is to remove the line which includes CmakeFiles in src/Ext/cmake_install.cmake, and restart 'make install'. The install should complete normally.

The library directory /usr/local/wt/lib will need to be added to /etc/ld.so.conf, and then run ldconfig to update things.

Remember to review the Ext widgets deployment page as there are some additional files to be downloaded and installed from Ext JS.

[/OpenSource/Debian/Development] permanent link

2008 Apr 24 - Thu

Installing Sun Java on Debian Lenny

Back in October last year, I mentioned how to get Sun Java installed in preparation for Eclipse. The rules have changed a bit.

You still need to put 'non-free' at the end of teh deb and deb-src lines in /etc/apt/sources.list. The secret to get the new flavour, which happens to be 1.6, is 'apt-get install sun-java6-jre' or 'apt-get install sun-java5-jre'.

Also, by default, Debian installs some other runtimes that seem to not work very well with eclipse. So to select the proper one, which was installed with the command in the previous paragraph, use 'update-alternatives --config java'.

On opening Eclipse/CDT, you may get an 'error opening the view', or some similar error regarding opening a view. The configuration above will make that error message go away.

[/OpenSource/Debian/Development] permanent link

2008 Jan 10 - Thu

Additional Configuration Notes for Wt, a C++ Web Toolkit

I need to append some additional notes to my 2007/10/03 Wt Configuration Guide article.

As mentioned in the Wt Ext Widget deployment notes, the Wt toolkit makes use of libraries from Ext JS. There are notes at the bottom of the Wt page itemizing the files needed from the JS Ext 1.1 .zip file.

As a side note, all things Ajax can be referenced one way or another starting at the ajaxian web site. Maybe not quite the truth. More all things Ajax at AjaxPatterns... if you want to get under the hood.

[/OpenSource/Debian/Development] permanent link

2007 Oct 03 - Wed

Installing And Configuring Wt, a C++ Web Toolkit

I mentioned in another article about doing web page development with C++. I came across Wt: a C++ Web Toolkit. It has been a bear to configure with the ASIO library. I'll layout what I've done below. I'm stuck with an SSL initialization problem. I'm probably going to have to move to FastCGI to see how well that works.

Based upon the forums, there are supposed to be some Debian Packages already available to make this work. Packages seem to be a bit behind the latest versions of stuff, so in this case, I wanted to be able to have a build system where I could incorporate the latest of Boost (which is supposed to have time-series avaliable shortly), and with Wt (which has an active CVS feed).

Anyway, here is my installation process so far. There are a couple of Kludges due to platform differences (a prefix of lib is needed on some stuff, which I should do a SED with at some time) and I can't figure out how the header file include stuff works properly (in order to keep it in a separate directory).

I started by downloading asio-0.3.7.tar.gz from asio.sf.net and boost_1_34_1.tar.tz from www.boost.org, and expanding them out to their directories in /usr/src.

apt-get install gcc
apt-get install zlib1g
apt-get install zlib1g-dev
apt-get install libbz2-dev
apt-get install libgd-dev
apt-get install cmake
apt-get install libfcgi-dev
apt-get install libapache2-mod-fastcgi
apt-get install libssl-dev

cd /usr/src/boost_1_34_1
./configure --without-icu --without-libraries=python,wave,test --libdir=/usr/lib/boost_34_1
make install
ln -s /usr/lib/boost_1_34_1/ /usr/lib/boost
ln -s /usr/include/boost-1_34_1/boost /usr/include/boost

Before proceeding, a patch needs to be applied to one of the ASIO files:

@@ -45,13 +45,13 @@
       {
         ::SSL_library_init();
         ::SSL_load_error_strings();        
+        ::OpenSSL_add_ssl_algorithms();
 
         mutexes_.resize(::CRYPTO_num_locks());
         for (size_t i = 0; i < mutexes_.size(); ++i)
           mutexes_[i].reset(new asio::detail::mutex);
         ::CRYPTO_set_locking_callback(&do_init::openssl_locking_func);
 
-        ::OpenSSL_add_ssl_algorithms();
       }
     }

It basically moves the location of '::OpenSSL_add_ssl_algorithms();'. Without it, an error such as the following may occur during runtime:

__gnu_cxx::recursive_init'
  what():  N9__gnu_cxx14recursive_initE
Aborted

ASIO can then be built:

cd /usr/src/asio-0.3.7
./configure --with-boost=/usr/include/boost --libdir=/usr/lib/ --includedir=/usr/include/
make
make install

After that fixup, Wt can be built.

cd /usr/src
cvs -d:pserver:anonymous@witty.cvs.sourceforge.net:/cvsroot/witty login
cvs -z3 -d:pserver:anonymous@witty.cvs.sourceforge.net:/cvsroot/witty co -P wt
cd wt
nano src/CMakeLists.txt
# prefix boost file entries with lib to get libboost
cmake -D DEPLOYROOT=/var/www/wt -D WEBUSER=www-data -D WEBGROUP=www-data \
-D BOOST_DIR=/usr/include/boost/ \
-D BOOST_COMPILER=gcc41 \
-D BOOST_VERSION=1_34_1 \
-D BOOST_INCLUDE_DIR=/usr/include/boost \
-D BOOST_LIB_DIR=/usr/lib/boost/  \
-D BOOST_DT_LIB_MT=/usr/lib/boost \
-D BOOST_DT_LIB=/usr/lib/boost \
-D BOOST_FS_LIB=/usr/lib/boost \
-D BOOST_FS_LIB_MT=/usr/lib/boost \
-D BOOST_PO_LIB_MT=/usr/lib/boost \
-D BOOST_REGEX_LIB_MT=/usr/lib/boost \
-D BOOST_SIGNALS_LIB_MT=/usr/lib/boost \
-D BOOST_THREAD_LIB=/usr/lib/boost \
-D BOOST_ASIO_INCLUDE_DIR=/usr/include/asio/  \
-D CMAKE_INSTALL_PREFIX=/ \
-D LIB_INSTALL_DIR=/usr/lib/wt/  \
-D LIBRARY_OUTPUT_PATH=/usr/lib/wt \
-D SHARED_LIBS=ON \
-D CONNECTOR_FCGI=ON \
-D CONNECTOR_HTTP=OFF \
.
# FCGI ON for FastCGI (production), HTTP ON for ASIO library (development)

make

# on error:
nano src/Ext/cmake_install.cmake
#  comment out cmakefiles line
rm /include/Ext/CMakeFiles
mkdir /include/Ext/CMakeFiles
cp /usr/src/wt/src/Ext/CMakeFiles/* /include/Ext/CMakeFiles

make install
mkdir /usr/include/wt
mv  /include/* /usr/include/wt/
rmdir /include

nano /etc/ld.so.conf
#  put in:
#   /usr/lib/wt
#   /usr/lib/boost_1_34_1
# ldconfig needs to be run if the fcgi or http libraries get switched or added
ldconfig

Back in Eclipse, I created C++ ANSI project, and then placed the content from examples/hello/hello.cpp into the .cpp file of the new project. The directories '/usr/include/boost-1_34_1' and '/usr/include/wt' need to be entered as 'include' paths. For GCC C++ Linker, the following are -L library search paths:

/usr/lib/wt
/usr/lib/boost_1_34_1

The following are -l libraries:

boost_signals-gcc41-mt-d
boost_filesystem-gcc41-mt-d
boost_program_options-gcc41-mt-d
boost_thread-gcc41-mt-d
boost_regex-gcc41-mt-d
wt
wthttp or wtfcgi
wtext

So... with some recompiling, I was able to get the hello sample up and running with FastCGI and then with the ASIO library.

When using FCGI, I renamed the compiled file to hello.wt, and placed it into /var/www/wt/, added the line 'FastCgiServer /var/www/wt/hello.wt' into /etc/apache2/mods-enabled/fastcgi.conf, and restarted Apache. Then by browsing to localhost/wt/hello.wt, I was able to get the demonstration.

When using ASIO, set the folloing for run-time command-line arguments in Eclipse to successfully start the application: '--doc-root=/var/www/wt --http-address=0.0.0.0 --http-port=8080'. Browsing to localhost:8080 will get the web page.

[/OpenSource/Debian/Development] permanent link

2007 Oct 02 - Tue

Installing Eclipse C++ Development Environment

The Eclipse C++ Development Environment is a Java based Integrated Development Environment (IDE). On Debian, it is a 'non-free' install. As such, the file /etc/apt/sources.list needs to have the word 'non-free' tacked on to the end of the deb and deb-src lines.

The command 'apt-get update' then needs to be run to update its lists.

The Java runtime environment can then be downloaded with 'apt-get install sun-java-jre'.

The downloaded Eclipse C++ Development Environment can be expanded. Within the expanded directory is a executable file called 'eclipse'. Start it and the environment is up and running. Dead easy.

[/OpenSource/Debian/Development] permanent link

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