* Replace libpng submodule with source
Taken from 505e70834d35383537b6491e7ae8641f1a4bed1876dbfe361201fc80868d88ca libpng-1.6.37.tar.xz
* Remove submodule-related config from CI
C:\Repos\StepMania\src\Grade.cpp(56): error C2440: 'type cast': cannot convert from 'double' to 'Grade' [C:\Repos\StepMania\Build\src\StepMania.vcxproj]
C:\Repos\StepMania\src\Grade.cpp(56): note: Conversions between enumeration and floating point values are no longer allowed
* Have clang and libc++ working.
If any clang users run into problems, remember to have libc++ and libc++abi set up.
Fixes
stepmania/src/arch/ArchHooks/ArchHooks.h:37:27: error:
variable has incomplete type 'tm'
virtual void SetTime( tm ) { }
^
/usr/include/wchar.h:83:8: note: forward declaration of 'tm'
struct tm;
^
* Add noexcept to swap.
See https://github.com/stepmania/stepmania/commit/e860773799f01d02f281c8c39421e7e34658788d#commitcomment-32674320
* Use standard c++11 for handling unexpected exceptions
The cxxabi.h header can make linking difficult.
Martin Kröning