CMake

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Erik Johansson

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Sep 30, 2006, 8:08:55 AM9/30/06

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Hi all,

Since all the other kids in the block are doing it, I felt I had to try
CMake[1] (replacement for autotools). So I have created the qt-gui_cmake
branch for this purpose. Since it now works for me, I would like to ask the
rest of you to try it out and let me know what you think.

HOWTO
=====
1. Check out the branch to licq/plugins
licq/plugins # svn co http://svn.licq.org/svn/branches/qt-gui_cmake

2. Create the dir where you will be building qt-gui. It is highly recommended
not to build directly in the source tree.
licq/plugins # mkdir qt-gui_cmake/build && cd qt-gui_cmake/build

3. Run "configure". For kde support:
build # cmake -DWITH_KDE=1 ..
(Note the two dots at the end. That is the path to the source.)

If you don't want kde, leave out -DWITH_KDE=1. To build with debug support,
add -DCMAKE_BUILD_TYPE=debug. That's it! If you'd like to change some
variable you can either use -DVAR=VALUE or run ccmake.
build # ccmake .
(Note the dot!)

4. Build it!
build # make
(make VERBOSE=1 gives more output)

NUMBERS
=======
My biggest problem with autotools (once you actually get it to work) is that
it's takes a looooong time to go from a freshly checked out copy to one
that's ready to build. That's pretty annoying when you're trying to fix the
build system.

# time (make -f Makefile.cvs && ./configure --with-kde)
real 0m35.253s
user 0m20.595s
sys 0m5.660s

# time cmake -DWITH_KDE=1 ..
real 0m4.485s
user 0m1.962s
sys 0m0.665s

Even if the test is not completely fair (configure checks for gpgme and a few
additional tools that cmake currently doesn't), the numbers still speak for
themselves.

TODO
====
The branch is not yet as complete as the autotools one.
- make install only installs the library
- the plugin is prefixed with lib so you have to use -p
full/path/to/liblicq_kde_gui.so when starting licq
- doesn't check for lrelease/lupdate (needed for locales)
- doesn't check for GPGME
- probably some more stuff here

What I'm interesting in hearing is: Does it build for you?

// Erik

[1] - http://www.cmake.org/

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