Add Option to Build As Shared Library With Position Independent Code

.github/workflows/cmake-multi-platform.yml

@@ -24,6 +24,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
         build_type: [Release]
         c_compiler: [gcc, clang, cl]
+        output_type: [STATIC, SHARED, SHARED_VERSIONED]
         include:
           # Windows + MSVC
           - os: windows-latest
@@ -56,7 +57,7 @@ jobs:
 
       - name: Configure CMake
         # Single-line command works on both Windows (PowerShell) & Linux (Bash).
-        run: cmake -S . -B build -DCMAKE_C_COMPILER=${{ matrix.c_compiler }} -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }} -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}  -Dqualisys_cpp_sdk_BUILD_TESTS=ON
+        run: cmake -S . -B build -DCMAKE_C_COMPILER=${{ matrix.c_compiler }} -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }} -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -Dqualisys_cpp_sdk_OUTPUT_TYPE=${{ matrix.output_type}} -Dqualisys_cpp_sdk_BUILD_TESTS=ON
 
       - name: Build
         # On Windows + MSVC (multi-config generator), --config picks Release/Debug.

CMakeLists.txt

@@ -1,12 +1,32 @@
 cmake_minimum_required(VERSION 3.8)
-project(qualisys_cpp_sdk)
+project(qualisys_cpp_sdk VERSION 1.0.0)
 
 option(${PROJECT_NAME}_BUILD_EXAMPLES "Build examples" OFF)
 option(${PROJECT_NAME}_BUILD_TESTS "Build tests" OFF)
 
+if(NOT DEFINED ${PROJECT_NAME}_OUTPUT_TYPE)
+    set(${PROJECT_NAME}_OUTPUT_TYPE "STATIC")
+endif()
+
+if(${PROJECT_NAME}_OUTPUT_TYPE STREQUAL "STATIC")
+    message(STATUS "Building a static library.")
+    set(LIB_TYPE "STATIC")
+    set(CMAKE_POSITION_INDEPENDENT_CODE OFF)
+elseif(${PROJECT_NAME}_OUTPUT_TYPE STREQUAL "SHARED")
+    message(STATUS "Building a shared library.")
+    set(LIB_TYPE "SHARED")
+    set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+elseif(${PROJECT_NAME}_OUTPUT_TYPE STREQUAL "SHARED_VERSIONED")
+    message(STATUS "Building a versioned shared library.")
+    set(LIB_TYPE "SHARED")
+    set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+else()
+    message(FATAL_ERROR "Invalid ${PROJECT_NAME}_OUTPUT_TYPE " ${${PROJECT_NAME}_OUTPUT_TYPE})
+endif()
+
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
 
-add_library(${PROJECT_NAME}
+add_library(${PROJECT_NAME} ${LIB_TYPE}
         Network.cpp
         RTPacket.cpp
         RTProtocol.cpp
@@ -26,24 +46,47 @@ target_include_directories(${PROJECT_NAME}
             $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>/External/tinyxml2
 )
 
-if(WIN32)
-    target_link_libraries(${PROJECT_NAME}
-        PUBLIC 
-            $<$<STREQUAL:"${CMAKE_CXX_COMPILER_ID}","MSVC">:ws2_32.lib iphlpapi.lib>
-            $<$<STREQUAL:"${CMAKE_CXX_COMPILER_ID}","GNU">:ws2_32 iphlpapi>
-    )
-endif()
-
+target_link_libraries(${PROJECT_NAME}
+    PUBLIC 
+        $<$<STREQUAL:$<PLATFORM_ID>,Windows>:ws2_32>
+        $<$<STREQUAL:$<PLATFORM_ID>,Windows>:iphlpapi>
+)
 
 # Enable C++14
 target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_14)
 set_target_properties(${PROJECT_NAME}
         PROPERTIES
         CXX_STANDARD_REQUIRED ON
         CXX_EXTENSIONS OFF
-        DEBUG_POSTFIX "-d"
 )
 
+if(LIB_TYPE STREQUAL "SHARED")
+    if(WIN32)
+        set_target_properties(${PROJECT_NAME} PROPERTIES
+            WINDOWS_EXPORT_ALL_SYMBOLS ON
+        )
+    endif()
+
+    if(NOT MSVC)
+        set_target_properties(${PROJECT_NAME} PROPERTIES
+            CMAKE_CXX_VISIBILITY_PRESET hidden
+            VISIBILITY_INLINES_HIDDEN ON
+        )
+    endif()
+
+    if (UNIX)
+        set_target_properties(${PROJECT_NAME} PROPERTIES
+            BUILD_RPATH "$ORIGIN"
+            INSTALL_RPATH "$ORIGIN"
+        )
+    endif()
+endif()
+
+# Apply versioning suffix if shared and requested
+if(${PROJECT_NAME}_OUTPUT_TYPE STREQUAL "SHARED_VERSIONED")
+    set_target_properties(${PROJECT_NAME} PROPERTIES OUTPUT_NAME "${PROJECT_NAME}-${PROJECT_VERSION}")
+endif()
+
 # ----------- INSTALL & EXPORT -----------
 
 include(GNUInstallDirs)
@@ -98,4 +141,5 @@ endif ()
 if(${PROJECT_NAME}_BUILD_TESTS)
     enable_testing()
     add_subdirectory(Tests)
+    set(${PROJECT_NAME}_OUTPUT_TYPE ${qualisys_cpp_sdk_OUTPUT_TYPE} CACHE BOOL "qualisys_cpp_sdk build type")
 endif()

Tests/CMakeLists.txt

@@ -37,6 +37,29 @@ target_link_libraries(${PROJECT_NAME}
         doctest::doctest
 )
 
+# Ensure if shared library, that it's found at runtime
+if(NOT qualisys_cpp_sdk_OUTPUT_TYPE STREQUAL "STATIC")
+    target_compile_definitions(${PROJECT_NAME} PRIVATE QUALISYS_SDK_SHARED)
+
+    if (UNIX)
+        set_target_properties(${PROJECT_NAME} PROPERTIES
+            BUILD_RPATH "${CMAKE_BINARY_DIR}"
+            INSTALL_RPATH "$ORIGIN"
+        )
+    elseif(WIN32)
+        add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+            "$<TARGET_FILE:qualisys_cpp_sdk>"
+            "$<TARGET_FILE_DIR:${PROJECT_NAME}>"
+        )
+    else()
+        set_target_properties(${PROJECT_NAME} PROPERTIES
+            BUILD_RPATH "$ORIGIN"
+            INSTALL_RPATH "$ORIGIN"
+        )
+    endif()
+endif()
+
 target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_17)
 
 if(MSVC)