This expands on #777 to work with jconfig.h properly.
To facilitate these operations, a new macro was added for doing compile tests.
Note that this commit does NOT bring in the other files associated with this version of libjpeg.
At some point, it would be desirable to automatically get the files as part of the cmake configuration step, similar to ffmpeg.
This attempts to organize all needed items and places appropriate defines
in a single location. Redundant comparisons/defines were removed when noticed.
A few caveats, however:
* This may be better targeted towards the 5_1_0 branch instead of master right now.
* Cmake will run a little slower on configuration/generation now. That's due to the sanity checks it runs.
* There are some more checks to be added later, but this should be a solid start.
Thanks to the [libical](https://github.com/libical/libical) project for inspiration.
This way if anyone wants to wipe their entire Build directory, it won't break entirely.
I am not responsible if anyone wipes the CMake folder. That is definitely not supported.
* Restore Windows installing to `C:\Games` by default.
* Restore Windows installing to the `Program` subdirectory.
* Use actual newlines in the `Build` documentation files.
* Remove the text that says that cmake is unstable.
There are two targets you may not be familiar with, `install` and `package`.
* For Linux, `install` now defaults to `/usr/local`, but you can set it back to `/opt` with `cmake -DCMAKE_INSTALL_PREFIX=/opt` if you wish.
* For Windows, `install` may not work, but this is not a target you would want usually.
* For Linux, `package` has not been tested yet. It will likely create an archive file of what is installed.
* For Windows, `package` will create an NSIS package that can be used to install StepMania. One minor change as a result is that the binary and companion dlls will be placed in `bin` instead of `Program` now, but it makes no difference code-wise.
Mac OS X users: for now, use the `dmg` target instead.
This commit does *not* deprecate the original nsi script yet. The Texture Font Generator program has not been addressed yet.
* Replace `string(CONCAT ...)` with an equivalent call for the cmake 2.8.12 users.
* Use `execute_process` instead of the deprecated `exec_program`. This will work regardless of version (assuming the minimum is met at least).
This should address issue #549.
* Disable warning output during configuration.
* Allow users to turn on warnings for ffmpeg and other internal projects.
* Add a new variable for easier ffmpeg version migration if we ever
* pursue that.
tl-dr: view the Build directory to see.
This is intended to replace the project files that we presently maintain
so that only a single set is needed instead of multiples.
The following setups were used for testing:
* Windows 8 and Visual Studio 2013 Desktop Express
* Windows 7 and Visual Studio 2012
* Mac OS X Mavericks and Xcode
* Ubuntu and makefiles
* Fedora 21 and makefiles
All three operating systems can generate projects, compile, link, and
run. Windows and Mac OS X users will find their compiled binary in the
same location as before, but Linux users will be surprised: it goes
straight into the root directory, along with a symlinked GtkModules.so
as appropriate. There is no more need for a manual symlinking step.
Known issues:
* At this time, MinGW likely does not work. Extra time will be needed.
* The WITH_JPEG option may go away, and we'll just always require it.
* Some linux libraries can use the system equivalents, but that is not up yet.
For more information, check out the Build directory.
Jason Felds