[CMake] install(EXPORT "XXXTargets" ...) includes target "XXX" which requires target "caffe2_library"...

[Mario Emmenlauer]

Dear all,

I'm trying to build a C++ project based on PyTorch with cmake package
configuration files. The includes and libs generally seem to work after
doing:

    find_package(Torch 1.0.0 REQUIRED)

But when I try to generate package configuration for my library, cmake
shows an error:
CMake Error: install(EXPORT "XXXTargets" ...) includes target "XXX" which requires target "caffe2_library" that is not in the export set.

I read a number of suggestions but they refer to the case where
"caffe2_library" would be one of my generated targets. I tried to
generate a target for "caffe2_library" and failed, and now I'm a
bit at a loss. Can someone lend me a hand?


Here is a cropped version of my CMakeLists.txt:

cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
project(XXX VERSION 1.0.0)
find_package(Torch 1.0.0 REQUIRED)
add_library(${PROJECT_NAME} include/XXX.hh src/XXX.cc)

target_include_directories(${PROJECT_NAME}
    PRIVATE
        ${CMAKE_CURRENT_SOURCE_DIR}/src
        ${CMAKE_CURRENT_BINARY_DIR}
    PUBLIC
        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
        $<INSTALL_INTERFACE:include>
        ${TORCH_INCLUDE_DIRS})

target_link_libraries(${PROJECT_NAME}
    PUBLIC
        ${TORCH_LIBRARIES})

export(TARGETS ${PROJECT_NAME} FILE cmake/${PROJECT_NAME}Targets.cmake)
export(PACKAGE ${PROJECT_NAME})

install(TARGETS ${PROJECT_NAME}
    EXPORT ${PROJECT_NAME}Targets
    ARCHIVE DESTINATION lib
    LIBRARY DESTINATION lib
    RUNTIME DESTINATION bin
    INCLUDES DESTINATION include)

install(EXPORT ${PROJECT_NAME}Targets
    DESTINATION lib/cmake/)


All the best,

    Mario Emmenlauer