Cant compile godot c++ module with static library
Alex161
Posts: 4Member
Hi community,
im programming a small game. There is a backend, written in C++ (server and stuff), which is quite complex. Now i want to integrate some stuff in an c++ module. The code works standalone.
So i wanted to import it as a static library, which is all in all easier for me. The library itself wont change that mutch, so a static library for me is ok.
I also was able to compile the tutorial-like summator-example. But when i add my code, i cant compile it anymore.
Im using godot 3.4.2 stable.
This is my folder structure:
Engine/modules/NetworkManager/lib/NetworkClientLibrary.lib
Engine/modules/NetworkManager/lib/NetworkClientLibrary.windows.tools.32.lib #this didnt fix it
godot/modules/NetworkManager/config.py
godot/modules/NetworkManager/NetworkManager.cpp
godot/modules/NetworkManager/NetworkManager.h
godot/modules/NetworkManager/register_types.cpp
godot/modules/NetworkManager/register_types.h
godot/modules/NetworkManager/SCsub`
NetworkManager .h
#ifndef NETWORKMANAGER_H
#define NETWORKMANAGER_H
#include "core/reference.h"
#include"../../../Network/StarShooterNetwork/NetworkClient.h"
#include"../../../Network/StarShooterNetwork/PhysicsManager.h"
class NetworkManager : public Reference {
GDCLASS(NetworkManager, Reference);
int count;
protected:
static void _bind_methods();
public:
void add(int p_value);
void reset();
int get_total() const;
NetworkManager();
void update();
private:
NetworkClient networkClient;
PhysicsManager physicsManager;
};
NetworkManager.cpp //small portion of it
void NetworkManager::_bind_methods() {
ClassDB::bind_method(D_METHOD("add", "value"), &NetworkManager::add);
ClassDB::bind_method(D_METHOD("reset"), &NetworkManager::reset);
ClassDB::bind_method(D_METHOD("get_total"), &NetworkManager::get_total);
ClassDB::bind_method(D_METHOD("update"), &NetworkManager::update);
}
void NetworkManager::update()
{
size_t maxMessages = 1000;
networkClient.update(maxMessages);
physicsManager.updatePhysics();
}
SCONS
Import('env')
env_module = env.Clone()
env_module.add_source_files(env.modules_sources, "*.cpp") # Add all cpp files to the build
env_module.Append(CPPPATH=["../../../Network/asio/include", "../../../Network/StarShooterNetwork"])
env.Append(LIBPATH=['lib'])
env.Append(LIBS='NetworkClientLibrary') `
If i run scons --clean, and then scons p=windows tools=yes bits=32 -j4 this happens:
scons: Reading SConscript files ...
Configuring for Windows: target=debug, bits=32
Found MSVC version 14.2, arch x86, bits=32
Checking for C header file mntent.h... (cached) no
scons: done reading SConscript files.
scons: Building targets ...
[...]
[ 96%] Building compilation database compile_commands.json
[ 96%] Linking Program ==> bin\godot.windows.tools.32.exe
[ 97%] ows.tools.32.lib'
[ 97%] scons: *** [bin\godot.windows.tools.32.exe] Error 1181
scons: building terminated because of errors.
[Time elapsed: 00:00:34.580]
If i change the includes to #include "NetworkClient.h" etc I get an Error
[100%] Linking Program ==> bin\godot.windows.tools.32.exe
LINK : fatal error LNK1181: cannot open input file 'NetworkClientLibrary.windows.tools.32.lib'
scons: *** [bin\godot.windows.tools.32.exe] Error 1181
scons: building terminated because of errors.
[Time elapsed: 00:00:23.844]
I really dont know what to do, it will be a small error, but i cant find it. Has anybody an idea?
Greetings
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I found out, that the problem is probably related, that scons or the compiler/linker doesnt find my library. First, i didnt compile with -j parameter. This way i was able to read some more error messages.
I changed my scons to
# SCsub
Import('env')
Using this configuration i got the error:
*** [bin\godot.windows.opt.tools.32.mono.exe] Implicit dependency
modules\NetworkManager\lib\PhysicsManager.windows.opt.tools.32.dll' not found, needed by targetbin\godot.windows.opt.tools.32.mono.exe'.Using just the env.Append(LIBPATH=['lib']), ill get
LINK : fatal error LNK1181: cannot open input file 'PhysicsManager.windows.opt.tools.32.lib'
The file is definetly present. I copied it in the bin folder, too and in the core folder.
Has anybody an idea?
Greetings
This sounds related to https://github.com/godotengine/godot/issues/23687.
Thx Calinou for pointing this out. I think you are right. The problem is, the solution in this issue didn't help me.
I found out, everything what is NOT in the module directory directly is automatically compiled as a static library, even when imported in SCONS with env_module.Append(CPPPATH="INSERT_REMOTE_PATH_HERE""]).
After hours of compiling, i didn't get it to work. So I made a dirty solution, which is to temporary copy all files for compilation and then removing them after that. So its then just compiled as part of the module-object and not a seperated static library.
This is a .bat file, so it's windows dependent, really nothing to be proud of, but wanted to share it with you, if someone has the similar issue. This works for me.
compileEngine.bat
I hope this can help someone, for me this works reliably.
Greetings