How to include Vcpkg on CMakeLists.txt?

Question

So I have a project which depends on opencv, which is installed with vcpkg. The project is build with cmake.

CMakeLists.txt

cmake_minimum_required(VERSION 3.19.1)

set(CMAKE_TOOLCHAIN_FILE ~/vcpkg/scripts/buildsystems/vcpkg.cmake)

project(mylib)

set (CMAKE_CXX_STANDARD 14)

find_package(OpenCV REQUIRED)

include_directories(~/vcpkg/installed/x64-osx/include)

link_libraries(${OpenCV_LIBS})

set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)

add_library(mylib SHARED mylib another_lib)

As can be seen, I'm trying to use the same CMakeLists.txt to build it on macOS and Windows.

The link_libraries(${OpenCV_LIBS}) translates nicely between different OSs.

But include_directories(~/vcpkg/installed/x64-osx/include) only works on macOS, on Windows it should refer to C:/vcpkg/installed/x64-windows/include instead.

Is there any opecv/vcpkg I can use inlace of these?

score 3 · Accepted Answer · answered Apr 05 '22 at 02:49

3

This include_directories(~/vcpkg/installed/x64-osx/include) looks odd. This should be instead that:

include_directories(${OpenCV_INCLUDE_DIRS})

answered Apr 05 '22 at 02:49

273K

29,503
10
41
64

score 1 · Answer 2 · answered Apr 08 '22 at 14:18

1

You can use vcpkg in the manifest mode https://vcpkg.readthedocs.io/en/latest/users/manifests/

This way you create a JSON file listing all of your dependencies and when invoking cmake vcpkg will automatically bootstrap and install all the dependencies.

answered Apr 08 '22 at 14:18

MarekR

2,410
1
14
10

Link doesn't work, can you update this? Thanks. – Raaka Jul 27 '23 at 13:45

score 0 · Answer 3 · answered Jul 13 '22 at 17:07

include_directories and link_libraries is old style cmake and should be avoided. target_link_libraries should be used instead.

Also using paths specific your our system is not recommended. CMAKE_TOOLCHAIN_FILE value should be provided when configuring project.

IMO it should go like this:

cmake_minimum_required(VERSION 3.19.1)

# this way others can override this value form command line
set(CMAKE_TOOLCHAIN_FILE ~/vcpkg/scripts/buildsystems/vcpkg.cmake CACHE FILEPATH "Path to toolchain")

project(mylib)
find_package(OpenCV REQUIRED)

set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)

add_library(mylib SHARED mylib another_lib)

# this should resolve problems with include and linking at the same time
# and only yor target will be impacted (and targets linking your target 
# since PUBLIC is used)
target_link_libraries(mylib PUBLIC ${OpenCV_LIBS})

How to include Vcpkg on CMakeLists.txt?

3 Answers3