GDNative C++ example scons error with MinGW

AldebaranDevs

Hello Good Day: Well last night i was till late trying to make this work, the GDNative C++ Example.

So this is the Guide: GDNative C++ Example

And bout this part:

cd godot-cpp scons platform=windows/linux/osx headers=../godot_headers generate_bindings=yes cd ..

Get this error:

C:\GodotEngine\cpp_example\godot-cpp>scons platform=windows headers=../godot_headers generate_bindings=yes scons: Reading SConscript files ... scons: done reading SConscript files. scons: Building targets ... g++ -o src\core\AABB.o -c /EHsc /D_DEBUG /MDd -I. -Igodot_headers -Iinclude -Iinclude\core src\core\AABB.cpp g++: error: /EHsc: No such file or directory g++: error: /D_DEBUG: No such file or directory g++: error: /MDd: No such file or directory scons: *** [src\core\AABB.o] Error 1 scons: building terminated because of errors.

Inside SConstruct i found this:

if host_platform == 'windows' and not env['use_mingw']:
    # MSVC
    env.Append(LINKFLAGS=['/WX'])
    if env['target'] == 'debug':
        env.Append(CCFLAGS=['/EHsc', '/D_DEBUG', '/MDd'])
    elif env['target'] == 'release':
        env.Append(CCFLAGS=['/O2', '/EHsc', '/DNDEBUG', '/MD'])

So i cant find the problem, and also where to start, i installed mingw and added path but seems SCONS cant find it.

Any help would be appreciated.

EDIT1: So, after reading the scrpit i made 2 modifucations in SConstruct:

opts.Add(BoolVariable('use_mingw', 'Use the MinGW compiler - only effective on Windows', True)) Original was False

env['CXX'] = 'g++' Original was: 'x86_64-w64-mingw32-g++'

And after trying the comand again i found folowing error:

C:\GodotEngine\cpp_example\godot-cpp>scons headers=../godot_headers generate_bindings=yes scons: Reading SConscript files ... scons: done reading SConscript files. scons: Building targets ... g++ -o src\core\AABB.o -c -g -O3 -std=c++14 -Wwrite-strings -I. -Igodot_headers -Iinclude -Iinclude\core src\core\AABB.cpp In file included from include\core/Vector3.hpp:6:0, from include\core/AABB.hpp:4, from src\core\AABB.cpp:1: include\core/String.hpp:4:29: fatal error: gdnative/string.h: No such file or directory #include <gdnative/string.h> ^ compilation terminated. scons: *** [src\core\AABB.o] Error 1 scons: building terminated because of errors.

Now , there is a problem with files from example??? Because the file string.h is in the path mentioned.

hashusfb

I get this error. Is there anyone who can help?

TwistedTwigleg

Unfortunately, I do not think there are many people who have used GDNative here on the forums. I have almost no experience with GDNative. Looking at the error, I would guess the issue is the compilier cannot find some files, but honestly I am just guessing.

You may want to post your error on Godot’s Facebook, Reddit, QA, and/or Discord group, where there are (hopefully) more developers with GDNative experience.

Other than that, I’m not really sure. Hopefully someone with more C++/GDNative experience will be able to help.

hashusfb

I'd be grateful if someone with a GDNative experience would write.

ProggerParrot

maybe my video can help here! In the comments you can also finde some extra solutions from the community <3

omomthings

Don't know if it still help now but to anyone facing this issue it's actually pretty simple, as stated in the title you are trying to compile using MinGW, so you just have to add the flag use_mingw=yes and that's all ..

aganierm

@omomthings I get this error.

mingw-bash$ scons platform=windows use_mingw=yes target=release

scons: Reading SConscript files ... NameError: name 'mySpawn' is not defined: File "/home/aganierm/Projects/godottest/godot-cpp-bin/godot-cpp/SConstruct", line 277: env["SPAWN"] = mySpawn

I fixed this error, I had to compile in windows CMD and not mingw bash for it to work. I got the cpp bindings compiled but I have another error now when trying to load it in godot "Can't open dynamic library"

kone9

If you look at the SConstruct that is inside godot-cpp, you will see that there is a condition for when you are "compiling on windows with mingw". Therefore if you are compiling in windows using mingw you would have to execute the instruction with scons as follows.

scons platform=windows generate_bindings=yes -j4 use_mingw=yes

It seems that if you do not execute with the variable "use_mingw = yes" it will use the other condition and show that error. I can assure you because the same thing happened to me.

Now I'm having problems because I can't generate the dll using minGW on windows, I'm modifying the Sconstruct, but I can't find the solution.