Use of '@import' when C++ modules are disabled, consider using -fmodules and -fcxx-modules

[lucasoliveiraw00]

Hello, I have an error when performing @import MobileMessaging; import, could you help me with this problem?

AppDelegate.mm: Use of '@import' when C++ modules are disabled, consider using -fmodules and -fcxx-modules

When adding the indicated flags, errors occur in other libraries when compiling.

• MobileMessaging SDK version: 9.2.16
• Xcode version: 14.0.1
• Your application language: Objective-C++
• Cocoapods version: 1.11.3

Originally posted by @lucasoliveiraw00 in #6 (comment)

[riskpp]

Hi @lucasoliveiraw00 which errors occur on other libraries with -fcxx-modules option?
I'm not sure that we could help here much, the other solution is to try to make your own wrapper for the MobileMessaging module and use interfaces from it's header file, but it looks not very easy.

[riskpp]

About the wrapper, this is just a simple example:

MobileMessagingCustomWrapper.h

#import <Foundation/Foundation.h>

@interface MobileMessagingCustomWrapper : NSObject

+ (void)startMobileMessagingWithApplicationCode:(NSString * _Nonnull)code;

@end

MobileMessagingCustomWrapper.m

#import "MobileMessagingCustomWrapper.h"

@import MobileMessaging;

@implementation MobileMessagingCustomWrapper

+ (void)startMobileMessagingWithApplicationCode:(NSString * _Nonnull)code {
    MMUserNotificationType *userNotificationType = [[MMUserNotificationType alloc] initWithOptions:@[MMUserNotificationType.alert, MMUserNotificationType.sound]];
    [MobileMessaging withApplicationCode: code notificationType: userNotificationType];
}

@end

AppDelegate.mm

#import "MobileMessagingCustomWrapper.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    [MobileMessagingCustomWrapper startMobileMessagingWithApplicationCode:@"Your app code"];

  return YES;
}
@end

[lucasoliveiraw00]

Hi @lucasoliveiraw00 which errors occur on other libraries with -fcxx-modules option? I'm not sure that we could help here much, the other solution is to try to make your own wrapper for the MobileMessaging module and use interfaces from it's header file, but it looks not very easy.

The following errors occur:

@riskpp could you tell me which option would it be to add the fcxx-modules flag?, so I can check if it's in the correct location.

[riskpp]

This is the screenshot which I did from the Example app

[lucasoliveiraw00]

About the wrapper, this is just a simple example:

MobileMessagingCustomWrapper.h

#import <Foundation/Foundation.h>

@interface MobileMessagingCustomWrapper : NSObject

+ (void)startMobileMessagingWithApplicationCode:(NSString * _Nonnull)code;

@end

MobileMessagingCustomWrapper.m

#import "MobileMessagingCustomWrapper.h"

@import MobileMessaging;

@implementation MobileMessagingCustomWrapper

+ (void)startMobileMessagingWithApplicationCode:(NSString * _Nonnull)code {
    MMUserNotificationType *userNotificationType = [[MMUserNotificationType alloc] initWithOptions:@[MMUserNotificationType.alert, MMUserNotificationType.sound]];
    [MobileMessaging withApplicationCode: code notificationType: userNotificationType];
}

@end

AppDelegate.mm

#import "MobileMessagingCustomWrapper.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    [MobileMessagingCustomWrapper startMobileMessagingWithApplicationCode:@"Your app code"];

  return YES;
}
@end

@riskpp, thank you very much, this solution worked!

[riskpp]

You are welcome, I'll close the issue then.