(wip) trying to setup c++ extension

.gitmodules

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+[submodule "evolve-die-repeat/thirdparty/godot-cpp"]
+	path = evolve-die-repeat/thirdparty/godot-cpp
+	url = https://github.com/godotengine/godot-cpp.git
+	branch = 4.5

evolve-die-repeat/thirdparty/.gitignore

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+bin
+*.uid
+*sconsign.dblite
+**.os
+
+godot-cpp/bin/
+*.o
+*.so

evolve-die-repeat/thirdparty/SConstruct

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+import os
+from SCons.Script import DefaultEnvironment, ARGUMENTS, Glob, Dir
+
+env = DefaultEnvironment()
+platform = ARGUMENTS.get("platform", "linux")
+target = ARGUMENTS.get("target", "template_debug")  # or template_release
+arch = ARGUMENTS.get("arch", "x86_64")
+
+HERE = Dir(".").abspath
+GODOTCPP = os.path.join(HERE, "godot-cpp")
+
+inc_paths = [
+    os.path.join(GODOTCPP, "include"),
+    os.path.join(GODOTCPP, "gen", "include"),
+]
+for extra in ("godot-headers", "gdextension"):
+    p = os.path.join(GODOTCPP, extra)
+    if os.path.isdir(p):
+        inc_paths.append(p)
+
+env.Append(CPPPATH=inc_paths)
+env.Append(LIBPATH=[os.path.join(GODOTCPP, "bin")])
+env.Append(CXXFLAGS=["-std=c++17", "-fPIC"])
+
+env.Append(LIBS=[f"godot-cpp.{platform}.{target}.{arch}"])
+
+outdir = os.path.join(HERE, "bin")
+os.makedirs(outdir, exist_ok=True)
+soname = f"gol.{platform}.{'debug' if target == 'template_debug' else 'release'}.{arch}"
+
+env.SharedLibrary(target=os.path.join(outdir, soname), source=Glob("src/*.cpp"))

evolve-die-repeat/thirdparty/cpp.gdextension

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+
+[configuration]
+entry_symbol = "gol_library_init"
+compatibility_minimum = "4.5"   ; required in 4.5+
+reloadable = true
+
+[libraries]
+linux.debug.x86_64   = "res://thirdparty/bin/libgol.linux.debug.x86_64"
+
+

evolve-die-repeat/thirdparty/godot-cpp

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+Subproject commit e83fd0904c13356ed1d4c3d09f8bb9132bdc6b77