Repros with CMake 3.25.0 shipping in VS 2022 17.5 Preview 2. In our project ([MSVC's STL](https://github.com/microsoft/STL)), we have ASM_MASM sources. When I tried to increase our minimum required version of CMake, it failed with: ``` CMake Error in CMakeLists.txt: MSVC_DEBUG_INFORMATION_FORMAT value 'ProgramDatabase' not known for this ASM_MASM compiler. ``` This is related to this new feature mentioned in the [CMake 3.25 release notes](https://cmake.org/cmake/help/latest/release/3.25.html): > The [`CMAKE_MSVC_DEBUG_INFORMATION_FORMAT`](https://cmake.org/cmake/help/latest/variable/CMAKE_MSVC_DEBUG_INFORMATION_FORMAT.html#variable:CMAKE_MSVC_DEBUG_INFORMATION_FORMAT) variable and [`MSVC_DEBUG_INFORMATION_FORMAT`](https://cmake.org/cmake/help/latest/prop_tgt/MSVC_DEBUG_INFORMATION_FORMAT.html#prop_tgt:MSVC_DEBUG_INFORMATION_FORMAT) target property were introduced to select the debug information format for compilers targeting the MSVC ABI. See policy [`CMP0141`](https://cmake.org/cmake/help/latest/policy/CMP0141.html#policy:CMP0141). As the example below demonstrates, we can work around this by setting the `CMP0141` policy to `OLD`. However, I believe that this workaround should not be necessary, and that this is a bug in CMake - it appears that its internal machinery wasn't taught how to send debug info options to MASM. While I am not a MASM expert, [MASM documentation](https://learn.microsoft.com/en-us/cpp/assembler/masm/ml-and-ml64-command-line-reference?view=msvc-170) says that `/Zi` "Generates CodeView information in object file.", and comments in MSVC's STL note that (somewhat confusingly) this is equivalent to what `/Z7` does for the `cl.exe` compiler - so `Embedded` in CMake's terminology should be translated to `/Zi` for MASM. As linked from the release notes, CMake's documentation for [`CMAKE_MSVC_DEBUG_INFORMATION_FORMAT`](https://cmake.org/cmake/help/latest/variable/CMAKE_MSVC_DEBUG_INFORMATION_FORMAT.html#variable:CMAKE_MSVC_DEBUG_INFORMATION_FORMAT) says: > If this variable is not set, the `MSVC_DEBUG_INFORMATION_FORMAT` target property will not be set automatically. If that property is not set, CMake selects a debug information format using the default value `$<$<CONFIG:Debug,RelWithDebInfo>:ProgramDatabase>`, if supported by the compiler, and otherwise `$<$<CONFIG:Debug,RelWithDebInfo>:Embedded>`. If I understand this correctly, because MASM doesn't support `ProgramDatabase`, CMake should fall back to `Embedded` instead of emitting an error that it doesn't know what to do. ``` C:\Temp\REPRO>"C:\Program Files\Microsoft Visual Studio\2022\Preview\VC\Auxiliary\Build\vcvars64.bat" ********************************************************************** ** Visual Studio 2022 Developer Command Prompt v17.5.0-pre.2.0 ** Copyright (c) 2022 Microsoft Corporation ********************************************************************** [vcvarsall.bat] Environment initialized for: 'x64' C:\Temp\REPRO>cmake --version cmake version 3.25.0-msvc1 CMake suite maintained and supported by Kitware (kitware.com/cmake). C:\Temp\REPRO>type CMakeLists.txt ``` ```cmake cmake_minimum_required(VERSION 3.25) if(DEFINED OVERRIDE_CMP0141) cmake_policy(SET CMP0141 ${OVERRIDE_CMP0141}) endif() project(meow_project LANGUAGES CXX ASM_MASM) set(SOURCES ${CMAKE_CURRENT_LIST_DIR}/meow.cpp ${CMAKE_CURRENT_LIST_DIR}/square.asm ) add_executable(meow ${SOURCES}) ``` ``` C:\Temp\REPRO>type meow.cpp ``` ```cpp #include <cstdio> extern "C" int square(int x); int main() { std::printf("\nHello, CMake world!\n"); std::printf("square(7): %d\n", square(7)); } ``` ``` C:\Temp\REPRO>type square.asm PUBLIC square _TEXT SEGMENT square PROC imul ecx, ecx mov eax, ecx ret 0 square ENDP _TEXT ENDS END C:\Temp\REPRO>cmake -G Ninja -S . -B out && ninja -C out && out\meow.exe -- The CXX compiler identification is MSVC 19.35.32124.0 -- The ASM_MASM compiler identification is MSVC -- Found assembler: C:/Program Files/Microsoft Visual Studio/2022/Preview/VC/Tools/MSVC/14.35.32124/bin/Hostx64/x64/ml64.exe -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: C:/Program Files/Microsoft Visual Studio/2022/Preview/VC/Tools/MSVC/14.35.32124/bin/Hostx64/x64/cl.exe - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Configuring done CMake Error in CMakeLists.txt: MSVC_DEBUG_INFORMATION_FORMAT value 'ProgramDatabase' not known for this ASM_MASM compiler. -- Generating done CMake Generate step failed. Build files cannot be regenerated correctly. C:\Temp\REPRO>cmake -G Ninja -S . -B out -DOVERRIDE_CMP0141=OLD && ninja -C out && out\meow.exe -- Configuring done -- Generating done -- Build files have been written to: C:/Temp/REPRO/out ninja: Entering directory `out' [1/3] Building ASM_MASM object CMakeFiles\meow.dir\square.asm.obj Microsoft (R) Macro Assembler (x64) Version 14.35.32124.0 Copyright (C) Microsoft Corporation. All rights reserved. Assembling: C:\Temp\REPRO\square.asm [3/3] Linking CXX executable meow.exe Hello, CMake world! square(7): 49 ``` Note: This seems to be similar to an old issue https://gitlab.kitware.com/cmake/cmake/-/issues/19453 but it is definitely not a duplicate of that issue.