All Questions
12,290
questions
581
votes
6
answers
760k
views
Debug vs Release in CMake
In a GCC compiled project,
How do I run CMake for each target type (debug/release)?
How do I specify debug and release C/C++ flags using CMake?
How do I express that the main executable will be ...
- 24k
535
votes
3
answers
278k
views
What is the difference between using a Makefile and CMake to compile the code?
I code in C/C++ and use a (GNU) Makefile to compile the code. I can do the same with CMake and get a Makefile. However, what is the difference between using a Makefile and CMake to compile the code?
- 5,845
428
votes
6
answers
407k
views
Define a preprocessor macro through CMake
How do I define a preprocessor variable through CMake?
The equivalent code would be #define foo.
- 6,205
418
votes
11
answers
908k
views
How to properly add include directories with CMake
About a year ago I asked about header dependencies in CMake.
I realized recently that the issue seemed to be that CMake considered those header files to be external to the project. At least, when ...
- 294k
302
votes
8
answers
788k
views
How do I add a linker or compile flag in a CMake file?
I am using the arm-linux-androideabi-g++ compiler. When I try to compile a simple "Hello, World!" program it compiles fine. When I test it by adding a simple exception handling in that code it works ...
- 4,459
283
votes
10
answers
324k
views
How do I make CMake output into a 'bin' dir?
I'm currently constructing a project with a plugin structure. I'm using CMake to compile the project. The plugins are compiled in separate directories. My problem is that CMake compiles and saves the ...
- 10.1k
258
votes
3
answers
174k
views
What is the difference between include_directories and target_include_directories in CMake?
I have a directory structure for my C++ code which goes like this :
|
|->include
|->src
I am writing a CMakeLists.txt file for my code. I want to understand the difference between ...
- 3,977
226
votes
4
answers
343k
views
How to create a shared library with cmake?
I have written a library that I used to compile using a self-written Makefile, but now I want to switch to cmake. The tree looks like this (I removed all the irrelevant files):
.
├── include
│ ├── ...
- 2,905
217
votes
2
answers
128k
views
What is the idiomatic way in CMAKE to add the -fPIC compiler option?
I've come across at least 3 ways to do this and I'm wondering which is the idiomatic way. This needs to be done almost universally to any static library. I'm surprised that the Makefile generator in ...
- 15.3k
214
votes
5
answers
121k
views
In CMake, how can I test if the compiler is Clang?
We have a set of cross-platform CMake build scripts, and we support building with Visual C++ and GCC.
We're trying out Clang, but I can't figure out how to test whether or not the compiler is Clang ...
- 23.8k
191
votes
2
answers
136k
views
CMake: Project structure with unit tests
I am trying to structure my project to include the production sources (in src subfolder) and tests (in test subfolder). I am using CMake to build this. As a minimal example I have the following files:
...
- 36.3k
182
votes
23
answers
592k
views
CMake error at CMakeLists.txt:30 (project): No CMAKE_C_COMPILER could be found
I'm trying make a Visual Studio solution with CMake to compile the latest version of aseprite and CMake keeps giving me the:
No CMAKE_C_COMPILER could be found.
No CMAKE_CXX_COMPILER could be found.
...
- 2,023
181
votes
10
answers
207k
views
OS specific instructions in CMAKE: How to?
I am a beginner to CMAKE. Below is a simple cmake file which works well in mingw environment windows. The problem is clearly with target_link_libraries() function of CMAKE where I am linking ...
- 1,961
146
votes
4
answers
112k
views
Override compile flags for single files
I would like to use a global set of flags for compiling a project, meaning that at my top-level CMakeLists.txt file I have specified:
ADD_DEFINITIONS ( -Wall -Weffc++ -pedantic -std=c++0x )
However, ...
- 1,793
145
votes
10
answers
254k
views
CMake unable to determine linker language with C++
I'm attempting to run a cmake hello world program on Windows 7 x64 with both Visual Studio 2010 and Cygwin, but can't seem to get either to work. My directory structure is as follows:
HelloWorld
-- ...
- 2,764
142
votes
7
answers
215k
views
How to link C++ program with Boost using CMake
What should my CMake file look like for linking my program with the Boost library under Ubuntu?
The errors shown during running make:
main.cpp:(.text+0x3b): undefined reference to `boost::...
- 27.9k
142
votes
31
answers
278k
views
CMake does not find Visual C++ compiler
After installing Visual Studio 2015 and running CMake on a previous project, CMake errors stating that it could not find the C compiler.
The C compiler identification is unknown
The CXX compiler ...
- 2,901
141
votes
3
answers
130k
views
Most simple but complete CMake example
Somehow I am totally confused by how CMake works. Every time I think that I am getting closer to understanding how CMake is meant to be written, it vanishes in the next example I read. All I want to ...
- 8,187
140
votes
4
answers
49k
views
C++ project organisation (with gtest, cmake and doxygen)
I am new to programming in general so I decided that I would start by making a simple vector class in C++. However I would like to get in to good habits from the start rather than trying to modify my ...
- 2,908
138
votes
6
answers
234k
views
How do I use CMake?
I am trying to use CMake in order to compile opencv.
I am reading the tutorial but can't understand what is CMakeLists files and how is it connected to the gui of CMake?
Also couldn't understand ...
- 6,101
136
votes
9
answers
206k
views
How to enable C++17 in CMake
I'm using VS 15.3, which supports integrated CMake 3.8. How can I target C++17 without writing flags for each specific compilers? My current global settings don't work:
# https://cmake.org/cmake/help/...
- 6,226
129
votes
10
answers
78k
views
How to Use CCache with CMake?
I would like to do the following: If CCache is present in PATH, use "ccache g++" for compilation, else use g++. I tried writing a small my-cmake script containing
CC="ccache gcc" CXX="ccache g++"...
- 20.7k
127
votes
3
answers
384k
views
How do I add a library path in cmake?
I have 2 folders "inc" and "lib" in my project which have headers and static libs respectively. How do I tell cmake to use those 2 directories for include and linking respectively?
- 2,964
121
votes
12
answers
97k
views
Using pre-compiled headers with CMake
I have seen a few (old) posts on the 'net about hacking together some support for pre-compiled headers in CMake. They all seem a bit all-over the place and everyone has their own way of doing it. What ...
- 1,211
115
votes
1
answer
240k
views
How to properly link libraries with cmake?
I can't get the additional libraries I am working with to link into my project properly.
I am using CLion, which uses cmake to build it's projects. I am trying to use several libraries in conjunction ...
- 3,603
110
votes
5
answers
105k
views
How to copy contents of a directory into build directory after make with CMake?
I've got some config files (xml, ini, ...) in the config directory next to the source files. How can I copy all the files in the config directory into the build directory (next to the executable file) ...
- 17.7k
109
votes
7
answers
172k
views
Using CMake to generate Visual Studio C++ project files
I am working on an open source C++ project, for code that compiles on Linux and Windows. I use CMake to build the code on Linux. For ease of development setup and political reasons, I must stick to ...
- 20.7k
102
votes
2
answers
40k
views
What are ALL_BUILD and ZERO_CHECK and do I need them?
I've created a simple CMakeLists.txt:
cmake_minimum_required(VERSION 2.8)
project (HelloWorld)
add_executable (HelloWorld main.cpp)
When I generate a VS2012 or VS2010 project from CMake, however, I ...
- 77.3k
97
votes
5
answers
131k
views
In CLion, header only library: file "does not belong to any project target, code insight features might not work properly"
I have a header-only library project set up with the cmake command:
add_library(my_library INTERFACE)
and I also added
target_sources(my_library INTERFACE ${MY_LIRBARY_HEADER_FILES})
but when I ...
- 19.5k
95
votes
3
answers
103k
views
Adding multiple executables in CMake
My code in a C++ project is organised as follows
I have several .cpp and .h files which contains my classes
I have several .cxx files which have to be compiled against the .cpp files and some ...
- 7,442
91
votes
6
answers
95k
views
What's the proper way to enable AddressSanitizer in CMake that works in Xcode
I've added AddressSanitizer flag as follow:
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
Everything builds and runs fine when using Unix Makefiles.
The problem comes when ...
- 1,614
88
votes
7
answers
60k
views
How to detect C++11 support of a compiler with CMake
Is there a way to let CMake detect automatically if a compiler supports C++11 or not?
As it would be nice to inform the users during the CMake run that the code will not compile as the compiler does ...
- 7,675
85
votes
5
answers
125k
views
How can I make CMake use GCC instead of Clang on Mac OS X?
I can't find any info on it, but only the other way around (e.g., how to set CMake to use clang).
I've installed gcc-4.8 using brew, setup all dependencies, headers, etc, and now CMake refuses to use ...
- 14.6k
84
votes
5
answers
111k
views
How to use CMAKE_EXPORT_COMPILE_COMMANDS?
I've been trying to use clang-modernize with CMAKE_EXPORT_COMPILE_COMMANDS as recommended in the help of this tool.
With this option cmake generates a JSON file containing compile info like include ...
- 5,614
83
votes
3
answers
56k
views
Overriding a default option(...) value in CMake from a parent CMakeLists.txt
I am trying to include several third-party libraries in my source tree with minimal changes to their build system for ease of upgrading. They all use CMake, as do I, so in my own CMakeLists.txt I can ...
user79758
80
votes
3
answers
160k
views
CMake with include and source paths - basic setup
I'm trying to set up a test project looking like my own project just to get things working first and it looks like this:
/MainProject/inc/main.h
/MainProject/src/main.cpp
/LibProject/inc/test.h
/...
- 1,125
80
votes
13
answers
49k
views
rc.exe no longer found in VS 2015 Command Prompt
I just installed Windows 10 Creators Update (version 10.0.15063).
I have multiple versions of Visual Studio installed (2012, 2013, 2015 and 2017). I installed VS 2017 only a couple weeks ago.
...
- 4,420
78
votes
4
answers
33k
views
How can I use the tool 'Include What You Use' together with CMake to detect unused headers?
The tool Include What You Use can be used to detect unneeded headers. I am using CMake for my C++ software project. How can I instruct CMake to run Include What You Use automatically on the source ...
- 11.1k
76
votes
6
answers
78k
views
Linking different libraries for Debug and Release builds in Cmake on windows?
So I've got a library I'm compiling and I need to link different third party things in depending on if it's the debug or release build (specifically the release or debug versions of those libraries). ...
- 14.3k
74
votes
8
answers
127k
views
How to generate CMakeLists.txt?
I need some pointers/advice on how to automatically generate CMakeLists.txt files for CMake. Does anyone know of any existing generators? I've checked the ones listed in the CMake Wiki but ...
- 5,635
72
votes
1
answer
52k
views
CMake: target_include_directories() prints an error when I try to add the source directory itself, or one of its subdirectories
I am writing a C++ library (header-only) and am using CMake to generate my (Visual Studio) project and solution files. I'm also writing a test suite, which is part of the same CMake project.
My ...
- 2,120
72
votes
6
answers
196k
views
cmake - find_library - custom library location
I'm currently trying to get CMake running for my project (on windows). I want to use a custom location where all libraries are installed. To inform CMake about that path I tried to do that:
set(...
- 3,053
71
votes
2
answers
69k
views
Does set_target_properties in CMake override CMAKE_CXX_FLAGS?
At the beginning of my CMake project, I'm setting general compilation flags in the variable CMAKE_CXX_FLAGS, like
set(CMAKE_CXX_FLAGS "-W -Wall ${CMAKE_CXX_FLAGS}")
Later on, I need to append ...
- 744
71
votes
3
answers
79k
views
How can I build a C++ project with multiple interdependent subdirectories?
I have a C++ project where I've used directories as more of an organizational element -- the way one might use packages in Java or directories in PHP. Directories are not intended to be self-...
- 12.7k
69
votes
3
answers
87k
views
How to get CMake to pass either std=c++14/c++1y or c++17/c++1z based on GCC version?
GCC 4.x doesn't accept the --std=c++14 switch for C++14 code - it takes --std=c++1y instead. Later versions take --std=c++1z but (probably) not --std=c++17 which has not been set yet (writing this in ...
- 124k
69
votes
8
answers
167k
views
CMake is not able to find BOOST libraries
I tried everything like:
Configure environment variable
Make fresh build
Re-install BOOST from source
sudo apt-get install libboost-all-dev
But still getting following Errors:
CMake Error at /usr/...
- 10.8k
68
votes
5
answers
77k
views
How can I define a C++ preprocessor macro through the command line with CMake?
I try to set a preprocessor macro in the command line of CMake. I've tried:
set generator="Visual Studio 8 2005"
set params=-D MY_MACRO=1
cmake.exe -G %generator% %params% ..\some_project
...
- 71.6k
67
votes
4
answers
122k
views
Cmake cannot find library using "link_directories"
I Ubuntu, I am learning about cmake and make, and just trying a simple example. I have two directories: src and build. In src, I have two files: main.cpp, and CMakeLists.txt, which has (only) the ...
- 23.5k
66
votes
3
answers
143k
views
Optimize in CMake by default
I have a C++ project which uses CMake as its build system. I'd like the following behavior:
If cmake is invoked as cmake .., then CMAKE_CXX_FLAGS is -O3 -Wall -Wextra
If cmake is invoked as cmake .. ...
- 6,204
66
votes
6
answers
109k
views
The proper way of forcing a 32-bit compile using CMake
Sorry that there are many similar questions, but I do find that Googling for CMake queries always yields similar-but-not-the-same scenarios, conflicting CMake commands and so on!
I need to force my ...
- 7,133