https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105467
--- Comment #6 from jpakkane at gmail dot com --- According to C++ foundation's developer survey [1] the most popular build system for C++ projects is CMake by quite a massive margin. Based on personal experience almost everybody uses CMake's Ninja backend rather than the Make backend on unixy platforms simply because it is so much faster CMake does not support modules in the Make backend [2]. Some people even claim that properly supporting Make to build C++ modules is not possible if you want to make it actually production quality and reliable. Modules are very much a forward looking thing. People who still use plain Make are most likely doing so on legacy projects that can not adopt modules in the near future in any case. Thus it would seem that the most probable ways C++ modules are going to be used are a) VS projects b) whatever Xcode ends up implementing c) Ninja files. [1] https://isocpp.org/files/papers/CppDevSurvey-2023-summary.pdf [2] https://cmake.org/cmake/help/latest/manual/cmake-cxxmodules.7.html