Although for developers this doesn't change anything, for our
linux-generic binary it changes everything. Without this, the
OpenGL dynamic library is dragged in as dependency, and as it
depends on X11, that will be dragged in too. This is not
something we prefer to have, as that won't run on as many
machines as it could.
SDL2 doesn't depend on OpenGL directly, as it tries to load it
in on runtime. If found, it would work in exactly the same way
as if we would link to OpenGL ourselves. As such, this is
the best of both worlds: our linux-generics have less linked
dependencies, and developers won't notice any difference.
As a side-effect, if someone uses linux-generic on a machine
that does not have any OpenGL package installed, it will
gracefully fall back to the default backend of SDL instead.
These bundles can be opened on any "modern" Linux machine with
a driver that SDL2 supports.
Machines needs at least glibc 2.15, which was released 10 years ago.
It is build with CentOS 7 as base, and only assumes the following
libraries are available on the system:
- libc
- libdl
- libgcc_s
- libpthread
- librt
- libstdc++
All other libraries the game depends on are bundled together with
the game, so users don't need any library installed to use this
bundle. The downside of course is that this increases the binary
size a bit: 30 MiB of libraries are in this bundle.
RPATH is used to make ld-linux find the folder libraries are
stored in; however, system libraries are always used before these,
in the assumption libraries on the user system are more up-to-date.
Using -DOPTION_PACKAGE_DEPENDENCIES=ON switches on packaging
of libraries in the "lib" folder. This requires CMake 3.16 to
be installed; otherwise it will fail.
Also parts of the saveload code does, and some other places. This
does slow down builds, but for most computers this will not be
measurable. At least, the ones I had access to I could not find
a difference in FPS, mainly as that is heavily limited by the Hz
of the screens of the computer.
Either way, it is better to have a full functional game than a
fast one in my opinion
Emscripten compiles to WASM, which can be loaded via
HTML / JavaScript. This allows you to play OpenTTD inside a
browser.
Co-authored-by: milek7 <me@milek7.pl>
LZO was used before the first version we track in our version
control system, which dates back to Aug 2004. Somewhere before
that time a few savegames / scenarios exist which use LZO. No
other savegame / scenario does since then. Let's not encourage
people to install something that ancient.
There are no scenarios on BaNaNaS that require LZO.
CPack works closely together with CMake to do the right thing in
terms of bundling (called 'package'). This generates all the
packaging we need, and some more.
