GDExtension code compiles fine, but says won't load in engine

Question

As the title states, code compiles, but won't load, stating "Error loading extension: res://bin/test.gdextension"

test.h:

#ifndef TEST_H
#define TEST_H

#include <godot_cpp/classes/node3d.hpp>

namespace godot {

class Test : public Node3D {
	GDCLASS(Test, Node3D)

protected:
	static void _bind_methods();

public:
	Test();
	~Test();
};

}

#endif // TEST_H

test.cpp:

#include "test.h"
#include <godot_cpp/core/class_db.hpp>

using namespace godot;

void Test::_bind_methods() {
}

Test::Test() {
    
}

Test::~Test() {
	
}

register_types.h

#ifndef TEST_REGISTER_TYPES_H
#define TEST_REGISTER_TYPES_H

void initialize_test_module();
void uninitialize_test_module();

#endif // TEST_REGISTER_TYPES_H

register_types.cpp:

#include "register_types.h"

#include "test.h"

#include <gdextension_interface.h>
#include <godot_cpp/core/defs.hpp>
#include <godot_cpp/core/class_db.hpp>
#include <godot_cpp/godot.hpp>

using namespace godot;

void initialize_test_module(ModuleInitializationLevel p_level) {
	if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
		return;
	}

	ClassDB::register_class<Test>();
}

void uninitialize_test_module(ModuleInitializationLevel p_level) {
	if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
		return;
	}
}

extern "C" {
// Initialization.
GDExtensionBool GDE_EXPORT test_library_init(GDExtensionInterfaceGetProcAddress p_get_proc_address, const GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
	godot::GDExtensionBinding::InitObject init_obj(p_get_proc_address, p_library, r_initialization);

	init_obj.register_initializer(initialize_test_module);
	init_obj.register_terminator(uninitialize_test_module);
	init_obj.set_minimum_library_initialization_level(MODULE_INITIALIZATION_LEVEL_SCENE);

	return init_obj.init();
}
}

test.gdextension:

[configuration]

entry_symbol = "test_library_init"
compatibility_minimum = "4.1"

[libraries]

macos.debug = "res://bin/libtest.macos.template_debug.framework"
macos.release = "res://bin/libtest.macos.template_release.framework"
windows.debug.x86_32 = "res://bin/libtest.windows.template_debug.x86_32.dll"
windows.release.x86_32 = "res://bin/libtest.windows.template_release.x86_32.dll"
windows.debug.x86_64 = "res://bin/libtest.windows.template_debug.x86_64.dll"
windows.release.x86_64 = "res://bin/libtest.windows.template_release.x86_64.dll"
linux.debug.x86_64 = "res://bin/libtest.linux.template_debug.x86_64.so"
linux.release.x86_64 = "res://bin/libtest.linux.template_release.x86_64.so"
linux.debug.arm64 = "res://bin/libtest.linux.template_debug.arm64.so"
linux.release.arm64 = "res://bin/libtest.linux.template_release.arm64.so"
linux.debug.rv64 = "res://bin/libtest.linux.template_debug.rv64.so"
linux.release.rv64 = "res://bin/libtest.linux.template_release.rv64.so"
android.debug.x86_64 = "res://bin/libtest.android.template_debug.x86_64.so"
android.release.x86_64 = "res://bin/libtest.android.template_release.x86_64.so"
android.debug.arm64 = "res://bin/libtest.android.template_debug.arm64.so"
android.release.arm64 = "res://bin/libtest.android.template_release.arm64.so"

SConstruct:

#!/usr/bin/env python
import os
import sys

env = SConscript("godot-cpp/SConstruct")

# For reference:
# - CCFLAGS are compilation flags shared between C and C++
# - CFLAGS are for C-specific compilation flags
# - CXXFLAGS are for C++-specific compilation flags
# - CPPFLAGS are for pre-processor flags
# - CPPDEFINES are for pre-processor defines
# - LINKFLAGS are for linking flags

# tweak this if you want to use different folders, or more folders, to store your source code in.
env.Append(CPPPATH=["source/"])
sources = Glob("source/*.cpp")

if env["platform"] == "macos":
    library = env.SharedLibrary(
        "bin/libtest.{}.{}.framework/libtest.{}.{}".format(
            env["platform"], env["target"], env["platform"], env["target"]
        ),
        source=sources,
    )
else:
    library = env.SharedLibrary(
        "bin/libtest{}{}".format(env["suffix"], env["SHLIBSUFFIX"]),
        source=sources,
    )

Default(library)

Barong

Answer 1

I figured out my issue. I was using godot-cpp version 4.2 while using engine version 4.1. Downloading the correct godot-cpp version has fixed my issue.

Barong