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

Question

This came up for me when I tried to integrate AdMob using Cocoapods into an Objective C++ project.

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

What is this error and how do I fix it?

Pentarchy

Answer 1

Fix is easy, you have to do what the warning says and not only enable C and Objective-C modules but also C++ modules.

So you must add the compiler flag -fcxx-modules to "Other C++ Flags" in your Build Settings

Pentarchy

Answer 2

Try this:

1. Open Build Settings tab under TARGETS
2. Search GCC_INPUT_FILETYPE
3. Check the value of Compile Sources, change the value to According to File Type if it's not

Acarology

Answer 3

Follow these steps :-

1. Search in build setting "apple clang - custom"
2. In other C++ flags
3. Add "-fcxx-modules" in Debug and Release.
4. Clean and Build.

Elane