First build that actually works. SDL_main errors before but didn't figure out the cause.

meson.build

@@ -0,0 +1,27 @@
+project('lodecaster', 'cpp',
+        default_options: ['cpp_std=c++20'])
+
+catch2 = dependency('catch2-with-main')
+fmt = dependency('fmt')
+json = dependency('nlohmann_json')
+sdl2 = dependency('sdl2')
+sdl2_main = dependency('sdl2main')
+
+dependencies = [
+  sdl2, sdl2_main,
+  fmt, json
+]
+
+executable('runtests', [
+            'quickcg.cpp',
+            'main.cpp',
+           ],
+           win_subsystem: 'windows',
+           dependencies: dependencies)
+
+executable('lodecaster', [
+            'quickcg.cpp',
+            'raycaster_flat.cpp',
+           ],
+           win_subsystem: 'windows',
+           dependencies: dependencies)