how can i build static program by cmake+clang+nmake on windows?

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1

i asked this question on stackoverflow two days ago.this is original post.
due to my low english proficiency,please don’t be surprised if there are any strange expressions.
thanks for your response.

2

So you want your executable to statically link to CRT (C++ runtime)? Because the term “static program” is probably not the most correct one.

You can take a look at how Microsoft itself does it in their vcpkg toolchain. So in your project it would be something like this (note the leading space inside quotes):

string(APPEND CMAKE_C_FLAGS_DEBUG " /MT")
string(APPEND CMAKE_C_FLAGS_RELEASE " /MT")

string(APPEND CMAKE_CXX_FLAGS_DEBUG " /MT")
string(APPEND CMAKE_CXX_FLAGS_RELEASE " /MT")

But for that to work you might need to use Visual Studio generator (I’ve never used NMake Makefiles).

3

This approach is quite obsolete.
Use preferably the variable CMAKE_MSVC_RUNTIME_LIBRARY or the target property MSVC_RUNTIME_LIBRARY to control how the build is done.

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4

i’ve tried these two variables but seems not work. Could you please give me an example?
actually, i’ve solved this weird problem by use this:

string(REPLACE "--dependent-lib=msvcrtd" "--dependent-lib=libcmtd" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})
string(REPLACE "-D_DLL" "" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})

and the whole CMakeLists.txt is:

cmake_minimum_required(VERSION 3.5)


set(CMAKE_C_COMPILER "C:/Software/LLVM/bin/clang.exe")
set(CMAKE_CXX_COMPILER "C:/Software/LLVM/bin/clang++.exe")

project(helloworld)

set(CMAKE_VERBOSE_MAKEFILE ON)

string(REPLACE "--dependent-lib=msvcrtd" "--dependent-lib=libcmtd" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})
string(REPLACE "-D_DLL" "" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})

message(${CMAKE_CXX_FLAGS_DEBUG})

set(CMAKE_CXX_COMPILER_TARGET i686-pc-windows-msvc)

set(CMAKE_CXX_STANDARD 17)
set(SOURCE helloworld.cpp)
add_executable(${PROJECT_NAME} ${SOURCE})

may this is a stupid solution,I don’t know how to do it better…
please reply me if you have any better suggestions, thank you very much.

5

I see neither my/Microsoft’s suggestion about /MT nor Marc’s suggestion about MSVC_RUNTIME_LIBRARY (much better one, admittedly) in your project file fragment.

6

i tried both of your suggestions but seems clang doesn’t support MSVC_RUNTIME_LIBRARY (just ignore and nothing happened) and /MT(it did good job in Visual Studio but i prefer not to use visual studio but vscode)… therefore, i replace the flags manually and delete those code…

7

The following is perfectly operational but require, at least, CMake version 3.15 (you specified version 3.5 through cmake_minimum_required() command):

cmake_minimum_required(VERSION 3.15)

set(CMAKE_C_COMPILER "C:/Software/LLVM/bin/clang.exe")
set(CMAKE_CXX_COMPILER "C:/Software/LLVM/bin/clang++.exe")

project(helloworld)

set(CMAKE_VERBOSE_MAKEFILE ON)

set(CMAKE_CXX_STANDARD 17)
set(SOURCE helloworld.cpp)
add_executable(${PROJECT_NAME} ${SOURCE})
set_property(TARGET main PROPERTY MSVC_RUNTIME_LIBRARY MultiThreadedDebug)

By the way, I strongly suggest to you to read the CMake documentation. For example, setting variable CMAKE_CXX_COMPILER_TARGET outside a toolchain file is irrelevant.

8

thanks for your perfect solution, i’ll try to read cmake doc.