CMP0194

Added in version 4.1.

MSVC is not an assembler for language ASM.

When enabling the ASM language, CMake considers C compiler drivers as assembler candidates. CMake 4.0 and below accidentally selected MSVC's cl compiler as the CMAKE_ASM_COMPILER, allowing the ASM language to be enabled on Windows even though cl does not support assembler sources. CMake 4.1 and above prefer to reject cl as an assembler candidate, but some existing projects unconditionally enable ASM on Windows even though they add no assembler sources. This policy provides compatibility for such projects to allow them to configure as before.

The OLD behavior for this policy is to successfully enable ASM even if cl is the only available candidate. The NEW behavior for this policy is to not consider cl as a candidate assembler for the ASM language.

This policy was introduced in CMake version 4.1. It may be set by cmake_policy() or cmake_minimum_required(). If it is not set, CMake warns, and uses OLD behavior.

Note

The OLD behavior of a policy is deprecated by definition and may be removed in a future version of CMake.