Cant build on linux using newest cmake, g++

[Lemorz56]

Enviroment: Ubuntu 18.04.3 LTS, building from master branch 861e294

MSBRG:~/Desktop/donut/build$ sudo cmake ..
-- Configuring done
-- Generating done
-- Build files have been written to: /home/lemorz56/Desktop/donut/build

MSBRG:~/Desktop/donut/build$ make
[  1%] Building CXX object src/CMakeFiles/donut.dir/AnimCamera.cpp.o
/home/lemorz56/Desktop/donut/src/AnimCamera.cpp:7:10: fatal error: filesystem: No such file or directory
 #include <filesystem>
          ^~~~~~~~~~~~
compilation terminated.
src/CMakeFiles/donut.dir/build.make:62: recipe for target 'src/CMakeFiles/donut.dir/AnimCamera.cpp.o' failed
make[2]: *** [src/CMakeFiles/donut.dir/AnimCamera.cpp.o] Error 1
CMakeFiles/Makefile2:85: recipe for target 'src/CMakeFiles/donut.dir/all' failed
make[1]: *** [src/CMakeFiles/donut.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

[handsomematt]

have fixes on my local branch, will push soon

[Lemorz56]

Okey, sorry if i tried to build during a commit "phase" or whatever you wanted to call it. Will try again later!

[handsomematt]

oh nevermind, this is actually a bug with filesystem being a newer standard, can be fixed by falling back on std::experimental::filesystem..

example impl:

https://github.com/openblack/openblack/blob/master/CMakeLists.txt#L32
https://github.com/openblack/openblack/blob/master/src/Common/FileStream.h#L25