Is it possible to use import std; with CMake?

[Jaakkko]

I'm using

• Android NDK 28.0.12674087
• CMake 3.31.2

According to cmake-cxxmodules import std can be used if Clang 18.1.2 or newer with -stdlib=libc++ is used. And if I'm understanding the NDK documentation correctly libc++ should be enabled by default. I'm meeting all these requirements (Clang version is 19.0.0).

However, I'm getting this error:

CMake Error in CMakeLists.txt:
  The "CXX_MODULE_STD" property on the target "myapplication" requires that
   the "__CMAKE::CXX23" target exist, but it was not provided by the
   toolchain.  Reason:
     Only `libc++` is supported

My CMakeLists.txt looks like this:

cmake_minimum_required(VERSION 3.31.2 FATAL_ERROR)

set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")

project("myapplication" LANGUAGES CXX)

set(CMAKE_CXX_MODULE_STD ON)
set(CMAKE_CXX_STANDARD 23)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS ON)

add_library(${CMAKE_PROJECT_NAME} SHARED myapplication.cpp)

target_link_libraries(${CMAKE_PROJECT_NAME} android log)

Is the import std feature supported? If yes, what am I doing wrong?