Closed copyrat90 closed 3 months ago
After commit https://github.com/fmtlib/fmt/commit/a9b851763854ffb21e9569f18e0f34b4f661fbeb (C++20 modules support), I'm experiencing this build error when I integrate fmt with FetchContent on C++20 or later.
FetchContent
I'm using WinLibs GCC 14.1.0 (MSVCRT) with Ninja 1.12.0 on Windows 10.
PS C:\Users\Home\test4> cmake --build .\build\ [1/4] Building CXX object _deps/fmt-build/CMakeFiles/fmt.dir/src/format.cc.obj FAILED: _deps/fmt-build/CMakeFiles/fmt.dir/src/format.cc.obj C:\Library\mingw64\bin\c++.exe -IC:/Users/Home/test4/build/_deps/fmt-src/include -std=c++20 -MD -MT _deps/fmt-build/CMakeFiles/fmt.dir/src/format.cc.obj -MF _deps\fmt-build\CMakeFiles\fmt.dir\src\format.cc.obj.d -fmodules-ts -fmodule-mapper=_deps\fmt-build\CMakeFiles\fmt.dir\src\format.cc.obj.modmap -MD -fdeps-format=p1689r5 -x c++ -o _deps/fmt-build/CMakeFiles/fmt.dir/src/format.cc.obj -c C:/Users/Home/test4/build/_deps/fmt-src/src/format.cc C:/Users/Home/test4/build/_deps/fmt-src/src/format.cc: error: failed reading mapper '_deps\fmt-build\CMakeFiles\fmt.dir\src\format.cc.obj.modmap' [2/4] Building CXX object _deps/fmt-build/CMakeFiles/fmt.dir/src/os.cc.obj FAILED: _deps/fmt-build/CMakeFiles/fmt.dir/src/os.cc.obj C:\Library\mingw64\bin\c++.exe -IC:/Users/Home/test4/build/_deps/fmt-src/include -std=c++20 -MD -MT _deps/fmt-build/CMakeFiles/fmt.dir/src/os.cc.obj -MF _deps\fmt-build\CMakeFiles\fmt.dir\src\os.cc.obj.d -fmodules-ts -fmodule-mapper=_deps\fmt-build\CMakeFiles\fmt.dir\src\os.cc.obj.modmap -MD -fdeps-format=p1689r5 -x c++ -o _deps/fmt-build/CMakeFiles/fmt.dir/src/os.cc.obj -c C:/Users/Home/test4/build/_deps/fmt-src/src/os.cc C:/Users/Home/test4/build/_deps/fmt-src/src/os.cc: error: failed reading mapper '_deps\fmt-build\CMakeFiles\fmt.dir\src\os.cc.obj.modmap' ninja: build stopped: subcommand failed.
cmake_minimum_required(VERSION 3.11) project(Test) set(CMAKE_CXX_STANDARD 20) set(CMAKE_CXX_STANDARD_REQUIRED ON) set(CMAKE_CXX_EXTENSIONS OFF) include(FetchContent) FetchContent_Declare(fmt GIT_REPOSITORY https://github.com/fmtlib/fmt.git GIT_TAG master ) FetchContent_MakeAvailable(fmt) add_executable(Test main.cpp) target_link_libraries(Test fmt)
// main.cpp int main() {}
cc @yujincheng08
Issue
After commit https://github.com/fmtlib/fmt/commit/a9b851763854ffb21e9569f18e0f34b4f661fbeb (C++20 modules support), I'm experiencing this build error when I integrate fmt with
FetchContent
on C++20 or later.I'm using WinLibs GCC 14.1.0 (MSVCRT) with Ninja 1.12.0 on Windows 10.
Reproduce