Question: Does it support compiling *.mm file on Mac OS?

[longlongh4]

Question: Does it support compiling *.mm file on Mac OS?

[therecipe]

It seems like the go build tool and therefore qtdeploy will ignore all .mm files (.m files work through)

So, you probably have to place your c++ functions inside some .cpp files and make them available to go/obj-c with extern "C", if you want to have it auto compiled with go build/qtdeploy

But, I'm not sure and there might be some way that I don't know.
(Maybe ask in golang-nuts, /r/golang ?)

[therecipe]

Okay, I got it working.

You need to compile the .mm file separately and create a static lib, so that you can link it against go.

Just run go generate && go build

main.go

package main

/*
#cgo LDFLAGS: -framework Foundation -L. -l main
#include "main.h"
*/
import "C"
import (
    "os"

    "github.com/therecipe/qt/core"
    "github.com/therecipe/qt/widgets"
)

//go:generate qtmoc
type GoObject struct {
    core.QObject

    _ func() `slot:sayHello`
}

//go:generate clang++ -pipe -O2 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -mmacosx-version-min=10.7 -Wall -W -fPIC -DQT_NO_DEBUG -DQT_CORE_LIB -I/usr/local/Qt5.5.1/5.5/clang_64/mkspecs/macx-clang -F/usr/local/Qt5.5.1/5.5/clang_64/lib -I/usr/local/Qt5.5.1/5.5/clang_64/lib/QtCore.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/OpenGL.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/AGL.framework/Headers -c -o ./libmain.o ./main.mm
//go:generate ar crv ./libmain.a ./libmain.o

func main() {
    widgets.NewQApplication(len(os.Args), os.Args)

    var goObject = NewGoObject(nil)
    goObject.ConnectSayHello(func() { println("Hello from Go") })

    var button = widgets.NewQPushButton2("sayHello", nil)
    button.ConnectClicked(func(_ bool) { C.sayHelloWrapper(goObject.Pointer()) })

    var layout = widgets.NewQVBoxLayout()
    layout.AddWidget(button, 0, 0)

    var window = widgets.NewQMainWindow(nil, 0)
    window.Layout().DestroyQObject()
    window.SetLayout(layout)
    window.Show()

    widgets.QApplication_Exec()
}

main.h

#pragma once

#ifndef GO_OBJC_H
#define GO_OBJC_H

#ifdef __cplusplus
extern "C" {
#endif

void sayHelloWrapper(void* ptr);

#ifdef __cplusplus
}
#endif

#endif

main.mm

#include "main.h"
#include "moc.h"

#import <Foundation/Foundation.h>
#include <QDebug>

void sayHelloWrapper(void* ptr){
    NSLog(@"Hello from Objective-C");

    GoObject_SayHello(ptr);

    qDebug() << "Hello from C++";
}