I am trying to link a static library which I have compiled from the assimp source to my executable CMake project so that it does not have to compile assimp as often since it's such a large library.
I compiled it using CMake with the following commands:
git clone https://github.com/assimp/assimp/ cd assimp mkdir build cd build cmake -DBUILD_SHARED_LIBS=OFF ../CMakeLists.txt cmake --build . My project structure looks like this:
. OpenGL ├── OpenGL │ ├── res │ ├── src │ | └── (my .cpp and .h files) │ └── CMakeLists.txt ├── libraries │ └── glfw, glew, imgui... └── CMakeLists.txt I now copy assimp/include and assimp/build/bin/Debug/config.h to OpenGL/libraries/assimp/include,
then assimp/build/lib/Debug to OpenGL/libraries/assimp/lib
My CMakeLists.txt(s) look like this:
cmake_minimum_required(VERSION 3.8) project(OpenGL LANGUAGES CXX C) set(CMAKE_CXX_STANDARD 20) set(CMAKE_CXX_STANDARD_REQUIRED ON) set(CMAKE_CXX_EXTENSIONS OFF) set(CMAKE_FIND_DEBUG_MODE) if (NOT MSVC) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1") endif() if (CMAKE_BUILD_TYPE STREQUAL Debug) add_definitions(-DDEBUG) # preprocessor macro else() if (MSVC) set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /SUBSYSTEM:WINDOWS /ENTRY:mainCRTStartup") # if running on release mode remove the cmd prompt on windows endif() endif() add_subdirectory(OpenGL) add_subdirectory(libraries/glfw) add_subdirectory(libraries/glew) add_subdirectory(libraries/nativefiledialog) target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/libraries/glfw/include ${CMAKE_CURRENT_SOURCE_DIR}/libraries/glew/include OpenGL/src libraries libraries/stb libraries/assimp/include libraries/nativefiledialog/src/include ) and
cmake_minimum_required(VERSION 3.8) file(GLOB_RECURSE OpenGL_sources *.cpp ../libraries/imgui/*.cpp ../libraries/stb/*.cpp) add_executable(${PROJECT_NAME} ${OpenGL_sources} "src/engine/input/Key.cpp" "src/engine/input/Buttons.h" "src/engine/input/Button.h" "src/engine/input/Button.cpp" "src/engine/input/MouseButton.h" "src/engine/input/MouseButton.cpp" "src/engine/rendering/objects/Model.h" "src/engine/rendering/objects/Model.cpp") target_link_libraries(${PROJECT_NAME} PUBLIC glfw libglew_static ${CMAKE_SOURCE_DIR}/libraries/assimp/lib/assimp-vc143-mtd.lib nativefiledialog ) or
cmake_minimum_required(VERSION 3.8) add_library( assimp STATIC IMPORTED ) set_property( TARGET assimp PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libraries/assimp/lib/assimp-vc143-mtd.lib) file(GLOB_RECURSE OpenGL_sources *.cpp ../libraries/imgui/*.cpp ../libraries/stb/*.cpp) add_executable(${PROJECT_NAME} ${OpenGL_sources} "src/engine/input/Key.cpp" "src/engine/input/Buttons.h" "src/engine/input/Button.h" "src/engine/input/Button.cpp" "src/engine/input/MouseButton.h" "src/engine/input/MouseButton.cpp" "src/engine/rendering/objects/Model.h" "src/engine/rendering/objects/Model.cpp") target_link_libraries(${PROJECT_NAME} PUBLIC glfw libglew_static assimp nativefiledialog ) (Both configurations give the same error)
Running cmake .. from OpenGL/build successfully completes which I think means that CMake was able to find the assimp library.
Now when I run cmake --build . I am greeted with the following error.
assimp-vc143-mtd.lib(AssbinLoader.obj) : error LNK2019: unresolved external symbol uncompress referenced in function "public: virtual void __cdecl Assimp::AssbinImporter::InternReadFile(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,struct aiScene *,class Assimp::IOSystem *)" (?InternReadFile@AssbinImporter@Assimp@@UEAAXAEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@PEAUaiScene@@PEAVIOSystem@2@@Z) [F:\dev\cpp\OpenGL\build\OpenGL\OpenGL.vcxproj] assimp-vc143-mtd.lib(Compression.obj) : error LNK2019: unresolved external symbol inflate referenced in function "public: unsigned __int64 __cdecl Assimp::Compression::decompress(void const *,unsigned __int64,class std::vector<char,class std::allocator<char> > &)" (?decompress@Compression@Assimp@@QEAA_KPEBX_KAEAV?$vector@DV?$allocator@D@std@@@std@@@Z) [F:\dev\cpp\OpenGL\build\OpenGL\OpenGL.vcxproj] etc... I believe this means that the function bodies were not found which should be compiled within the .lib.
How do I successfully link the library?
