Compile with /MT instead of /MD using CMake
You can modify the CMAKE_CXX_FLAGS_<Build Type>
and/or CMAKE_C_FLAGS_<Build Type>
variables:
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MTd")
If your CMake flags already contain /MD
, you can ensure that the above commands are executed after the point at which /MD
is inserted (the later addition of /MT
overrides the conflicting existing option), or you can set the flags from scratch:
set(CMAKE_CXX_FLAGS_RELEASE "/MT")
set(CMAKE_CXX_FLAGS_DEBUG "/MTd")
Or alternatively, you could replace the existing /MD
and /MDd
values with /MT
and /MTd
respectively by doing something like:
set(CompilerFlags
CMAKE_CXX_FLAGS
CMAKE_CXX_FLAGS_DEBUG
CMAKE_CXX_FLAGS_RELEASE
CMAKE_C_FLAGS
CMAKE_C_FLAGS_DEBUG
CMAKE_C_FLAGS_RELEASE
)
foreach(CompilerFlag ${CompilerFlags})
string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
endforeach()
CMake finally added proper support for this in version 3.15 with the MSVC_RUNTIME_LIBRARY
target property:
cmake_minimum_required(VERSION 3.15)
cmake_policy(SET CMP0091 NEW)
project(my_project)
add_executable(foo foo.c)
set_property(TARGET foo PROPERTY
MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
You can also specify a global default by setting the CMAKE_MSVC_RUNTIME_LIBRARY
variable instead.