Remove that link_libraries_to_executable() hack and defines a proper
raylib target that can be used with target_link_libraries.
The same target is also available for external (user) code by using
find_package(raylib).
This results in:
- Remove hardcoded build directories from examples and games CMakeLists.txt
- Allow rlgl_standalone and other special examples to be built easily
- Allow CMake projects to find_package(raylib instead of fiddling with pkg-config
- Makes code a little more maintainable
- Fixes#471, #606.
- Makes code less confusing by removing the double use of PLATFORM (#584).
Note that this is still not _The Right Way_(TM), because normally
raylib-config.cmake (or its includes) would be automatically generated.
I didn't manage to get that to work though, so I went the easier route
of just wrapping pkg_check_modules for consumption by find_package.
Currently, if:
* GCC doesn't supports -no-pie: Build error
* GCC supports -no-pie
* GCC is not configured with --enable-default-pie: No-op
* GCC is configured with --enable-default-pie:
Slightly worse performance because we still generate -fpie code
(-pie affects linker, -fpie affects compiler)
So instead of probing for existence of -fno-pie -no-pie, remove it altogether.
Fixes#540: Build breakage on Debian 8 with gcc 4.9.
Inspired by #504.
Instead of requiring the user to do PLATFORM_ANDROID #ifdefery,
have the android_main entry point exported by raylib and call
the user-defined main. This way many games could (in theory)
run unmodified on Android and elsewhere.
This is untested!
They were disabled because they failed to build,
but this patch set fixes the build on Linux and macOS.
This doesn't apply to the AppVeyor build on Windows yet;
it currently fails at linking with OpenAL.
