CODEWITHSUNDEEP
c++cmakeglm-math
eheperson
eheperson

Reputation: 81

GLM linking in CMakeLists.txt

I cannot link glm library with my executable. I tried link via ${GLM_INCLUDE_DIRS}, ${GLM_LIBRARIES} and ${GLM_LIBRARY_DIRS} cmake variables but it does not work.

How can I link libraries and inludes of glm with my executable?

I am using find_package() method :

find_package(glm REQUIRED PATHS "${GLM_BINARY_DIR}" NO_DEFAULT_PATH)

And does not have any problem with find_package() but these status messages below displays nothing :

message(STATUS "GLM includes ${GLM_INCLUDE_DIRS}")
message(STATUS "GLM libraries ${GLM_LIBRARY_DIRS}")

Upvotes: 2

Views: 12589

Answers (3)

Connor White
Connor White

Reputation: 21

Honestly for me, I am using MacOS and I found installing GLM from the github to work:

git clone https://github.com/g-truc/glm

Then I build and install it:

cd /path/to/glm
cmake \
    -DGLM_BUILD_TESTS=OFF \
    -DBUILD_SHARED_LIBS=OFF \
    -B build .
cmake --build build -- all
cmake --build build -- install

This worked for me: https://github.com/g-truc/glm

Upvotes: 0

Tsyvarev
Tsyvarev

Reputation: 66089

Config script for GLM defines IMPORTED target glm::glm. So the correct way for use GLM in CMake code is to link with that target. This is explicitly written in the documentation:

set(glm_DIR <installation prefix>/lib/cmake/glm) # if necessary
find_package(glm REQUIRED)
target_link_libraries(<your executable> glm::glm)

Variables like GLM_LIBRARIES or GLM_INCLUDE_DIRS are usually defined by Find scripts (shipped with CMake or with the consumer project).

Config scripts, shipped with the installed package, normally defines IMPORTED targets.

GLM doesn't have a Find script (see FindGLM.cmake not in glm 0.9.7, is it a deprecated way to find libraries in CMAKE?), and PATHS option in find_package invocation explicitly requests Config script.

Upvotes: 8

eheperson
eheperson

Reputation: 81

My approach was wrong.

From OpenGL GLM offical page:

OpenGL Mathematics (GLM) is a header only C++ mathematics library for graphics software based on the OpenGL Shading Language (GLSL) specifications.

So, I just need to specify the /include path of builded GLM library in which the linker should search for libraries when linking a given target.

That can be handled by cmake target_include_directories() function. This fixed my problem :

target_include_directories(myExecutable "${GLM_BINARY_DIR}/include")

${GLM_BINARY_DIR} is defined by me and points to the where GLM binaries are stored.

Upvotes: -1

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