[Freeorion-programmers] Troubles with files setup

[Guillaume R. <gui...@gm...>]

Hello.

I'm packaging freeorion 0.3.15 for mandriva Linux. However, I've a small
issue with files setup.

First, I need to install the binaries under /usr/games, and the data
under /usr/share/games, for FHS compliance. But the cmakefile
configuration seems to install everything related to
CMAKE_INSTALL_PREFIX directly, without allowing to pass additional
configuration flags. I've been reading the various CMakefile.txt files
without finding anything pertaining to data files installation, only a
generated cmake_install.cmake file, for which I couldn't find the origin.

Second, the code for GetDataRootDir (and probably others), use an
hard-coded location (/usr/local/share for Linux), whereas this location
is actually determined at install time, and should be registered at that
moment. In autotools world, the configuration process creates a config.h
with all relevant informations, that can be included in binaries to
handle this. I have no clue about how to do this with cmake, tough.

Currently, I install file manually, and patch Directories.cpp to
hardcode another directory, but that's not a generic solution. A beter
solution would be a way to build with something as:
cmake
    -DCMAKE_INSTALL_PREFIX=/usr/games
    -DDATA_INSTALL_PREFIX=/usr/share/games

And have the resulting binary automatically configured. Again, I'd be
delighted to provide a patch myself, but I don't know cmake enough for this.
 --
BOFH excuse #298:

Not enough interrupts