I have a QT Application and I am using CMake for building the project.
I want to compile the same code using mingw32 into windows binaries.
When I run CMake it shows that I don't have "MinGW Makefiles" generator. I don't see any place from where to install these generators. How can I install these generators ?
Related
I'm currently working on a C++ project that build successfully on Linux using CMake, Make & GCC, and also on Windows using CMake & VS2015.
For some reason, i'd like to build it using the same toolchain everywhere, so i planned to use CMake, Clang & Ninja.
I started to try to build it on Windows, but i did not find any documentation to build using libc++ and without anything from the MSVC toolchain.
Am I forced to install MSVC build tools in order to build with CMake & Clang ?
Use a MinGW-w64 of GCC on Windows (e.g. the one from http://winlibs.com, or any other one listed at http://mingw-w64.org/).
If you combine this with the MSYS2 shell (http://www.msys2.org/), you can build a lot using the same tools as on Linux (autoconf, CMake, meson, ...).
I try to use the c++ language bindings for the ev3dev lego brick: https://github.com/ddemidov/ev3dev-lang-cpp
The instruction is as follows:
mkdir build
cd build
cmake .. -DEV3DEV_PLATFORM=EV3
make
I am running windows and have cmake and mingw available. After running cmake it creates some files in the build directory. However: There is no makefile which could be picked of by make. So I am wondering how iam supposed to compile these bindings
On Windows, CMake generates a MSVC solution by default. Check for a .sln file in your build directory.
The instructions you linked are assuming a Unix-ish platform, where the default is to create Makefiles.
If you actually want Makefiles on Windows, add -G "Unix Makefiles" to the cmake line.
If you want to use MSVC as compiler but work on the command line, another option is -G "NMake Makefiles", and calling nmake after that.
Make sure to delete your build directory before trying to build a new generator target. CMake can be touchy about that.
Check cmake --help for a list of available options. (Especially the generator targets are platform-specific.)
I'm trying an hello world test to make cmake under Windows, using MinGW as compiler.
This answer suggests to run cmake with the -G flag as following:
cmake -G "MinGW Makefiles" .
However, if I do this, I get a message saying that that is not a known generator.
Indeed, running cmake --help, under the Generators section it lists the following generators:
and as you can see, "MinGW Makefiles" is not listed.
If this is relevant, I have MinGW installed and working on my system in the usual folder C:\MinGW. I also have MinGW-w64 installed through WinBuilds and MSYS2, again in the default installation folders.
I'm using cmake version 3.5.2, installed through MSYS2.
Why is "MinGW Makefiles" not listed among the generators?
Only the Windows version of CMake does know the MinGW Makefiles and MSYS Makefiles generators.
If you have downloaded the MinGW/MSYS CMake version try using the Unix Makefiles generator or don't use the -G option (to auto-detect your compiler toolchain).
If you still get errors, please see the references below.
References
cmake MSYS Makefiles generator missing
CMake Error at CMakeLists.txt:30 (project): No CMAKE_C_COMPILER could be found
I recently installed MSYS2 on Windows, along with the MinGW-w64 toolchain and CMake. Specifically, I used the following packages:
mingw-w64-i686-gcc
mingw-w64-i686-cmake
make
Trouble is, whenever I invoke CMake from within the MSYS2 shell with cmake -G"MSYS Makefiles", it fails with the following:
target_compile_features no known features for CXX compiler
"GNU"
version 4.9.2.
The line in CMakeLists.txt that generates the error is this: target_compile_features(myproject PUBLIC cxx_decltype).
If I run CMake from outside the MSYS2 shell (I also have it installed separately) with the "MinGW Makefiles" generator, the makefile generation succeeds.
Inside MSYS2, the CMake version is 3.2.3. The version outside is 3.3.0.
Is there any way to resolve this issue? Thanks in advance.
There was bug about interaction of compile features mechanism in CMake 3.3 with gcc 4.8+:
https://public.kitware.com/Bug/view.php?id=15443. It have been fixed several months ago. You need that fix being applied.
Run cmake from mingw64_shell.bat or mingw32_shell.bat. CMake will otherwise pickup msys2 GCC rather than a native one.
I'm using win7-32bit + cmake + vs2013's NMake.exe to build exe, I need the exe be able to run on WinXP, I know how to do that with vs2013 IDE(set the Platform-Toolset to v120xp), but I'm not using the IDE, I just use its NMake. This is how I generate the project file and exe:
build> cmake -G "NMake Makefiles" ..
build> nmake
Question 1: In the CMakeLists.txt, how to set it use v120xp?
Question 2: Is it necessary to build all static lib with the v120xp? Or just the exe?
Try setting CMAKE_GENERATOR_TOOLSET. It allows selecting the toolset for Genertors that support it. Generators that support Toolsets are Visual Studio and XCode.
Your call to CMake should look like this:
cmake -G "NMake Makefiles" -DCMAKE_GENERATOR_TOOLSET=v120_xp ..
Update 1: As pointed out in the comments NMake doesn't support Toolsets
Thes solution is to specify
SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /SUBSYSTEM:CONSOLE,5.01")
for console applications, or
SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /SUBSYSTEM:WINDOWS,5.01")
for windows applications.