Installing using GNU autotools possibly outdated

[DharminB]

Problem

Installing using GNU autotools steps created following issues

1. find_package in custom cmake project does not work (since FreeOpcUaConfig.cmake has not been generated)
2. subset of include files don't get copied to target include dir (e.g. opc/common/logger.h, entire opc/spdlog dir)

Additional info
OS: GNU/Linux (Ubuntu 20.04)
install target: /usr/local
repo branch: master
autoconf version: 2.69
custom cmake project file

cmake_minimum_required(VERSION 3.10.2)
project(my_opcua_proj)

add_compile_options(-std=c++11 -Wall)

find_package(FreeOpcUa REQUIRED)

add_library(my_server
    src/my_server.cpp
)
target_link_libraries(my_server
    ${ADDITIONAL_LINK_LIBRARIES}
    opcuaprotocol
    opcuacore
    opcuaserver
)

where my_server.cpp is exact copy of freeopcua/src/examples/example_server.cpp

---

Tried Solution

For 1, a temporary "fix" was applied by creating /usr/local/lib/cmake/FreeOpcUaConfig.cmake with following content

# Set the paths for FreeOpcUA
set(FreeOpcUA_INCLUDE_DIRS "/usr/local/include")
set(FreeOpcUA_LIBRARY_DIRS "/usr/local/lib")

# Add the include and library directories to the appropriate variables
list(APPEND CMAKE_INCLUDE_PATH ${FreeOpcUA_INCLUDE_DIRS})
list(APPEND CMAKE_LIBRARY_PATH ${FreeOpcUA_LIBRARY_DIRS})

# Provide information about the FreeOpcUA libraries
set(FreeOpcUA_LIBRARIES "opcuaprotocol opcuacore opcuaserver")

which helped progress to issue 2. where the cmake call succeeds but make call fails with error about unable to find opc/common/logger.h in custom cmake project. This was "fixed" by manually copying logger.h from cloned freeopcua/include/opc/common/ to the respective directory in /usr/local/include. After that, same issue occurs during make call with spdlog files.

Upon uninstalling and removing all the files from target install and installing using cmake instructions worked like a charm.

---

Possible Conclusion

Maybe 🤷🏽‍♂️ autotools instructions are outdated compared to cmake.

PS: For my use case installation with cmake was sufficient. Just created issue for future users since I could not find anything similar in the open issues.

[guojing555]

  您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。