CMake，Microsoft Visual Studio和Monolithic Runtimes

Question

我正在使用CMake Build System和Microsoft的Visual C ++编译器构建文件。当我让CMake生成visual studio项目时，该项目包含用于构建“多线程DLL”的命令行。运行时的类型 - 一个依赖于msvcrt.dll的运行时。由于各种原因，我现在没有进入，我不能依赖于msvcrt。

有没有办法告诉CMake在其构建过程中修改此选项？

Answer 1

我使用以下代码链接到静态CRT：

if(MSVC)
# We statically link to reduce dependencies
foreach(flag_var CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
    if(${flag_var} MATCHES "/MD")
        string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
    endif(${flag_var} MATCHES "/MD")
    if(${flag_var} MATCHES "/MDd")
        string(REGEX REPLACE "/MDd" "/MTd" ${flag_var} "${${flag_var}}")
    endif(${flag_var} MATCHES "/MDd")
endforeach(flag_var)
endif(MSVC)

Answer 2

我用静态标志（/ MT和/ MTd）替换动态标志（/ MD和/ MDd）。另外，我发现我需要缓存标志变量才能使它坚持下去。

if(MSVC)
    foreach(flag_var CMAKE_C_FLAGS_DEBUG CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS_RELEASE CMAKE_C_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO CMAKE_CXX_FLAGS_RELWITHDEBINFO) 
        string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
        string(REGEX REPLACE "/MDd" "/MTd" ${flag_var} "${${flag_var}}")
    endforeach(flag_var)
    SET (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG}" CACHE STRING "MSVC C Debug MT flags " FORCE)    
    SET (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" CACHE STRING "MSVC CXX Debug MT flags " FORCE)
    SET (CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}" CACHE STRING "MSVC C Release MT flags " FORCE)
    SET (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}" CACHE STRING "MSVC CXX Release MT flags " FORCE)
    SET (CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL}" CACHE STRING "MSVC C Debug MT flags " FORCE)    
    SET (CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}" CACHE STRING "MSVC C Release MT flags " FORCE)
    SET (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}" CACHE STRING "MSVC CXX Debug MT flags " FORCE)    
    SET (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}" CACHE STRING "MSVC CXX Release MT flags " FORCE)
endif()