refactor(build): Make the dependencies not exposed in the API private

CMakeLists.txt

@@ -495,10 +495,11 @@ endif()
 ######################
 
 set(open62541_LIBRARIES "")
+set(open62541_PUBLIC_LIBRARIES "")
 if("${UA_ARCHITECTURE}" STREQUAL "posix")
     list(APPEND open62541_LIBRARIES "m")
-    if(UA_MULTITHREADING OR UA_BUILD_UNIT_TESTS)
-        list(APPEND open62541_LIBRARIES "pthread")
+    if(UA_MULTITHREADING GREATER_EQUAL 100 OR UA_BUILD_UNIT_TESTS)
+        list(APPEND open62541_PUBLIC_LIBRARIES "pthread")
     endif()
     if(NOT APPLE AND (NOT ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD"))
         list(APPEND open62541_LIBRARIES "rt")
@@ -1421,7 +1422,8 @@ SET_TARGET_PROPERTIES(open62541 PROPERTIES
                       VERSION "${OPEN62541_VER_MAJOR}.${OPEN62541_VER_MINOR}.${OPEN62541_VER_PATCH}")
 
 # DLL requires linking to dependencies
-target_link_libraries(open62541 ${open62541_LIBRARIES})
+target_link_libraries(open62541 PUBLIC ${open62541_PUBLIC_LIBRARIES})
+target_link_libraries(open62541 PRIVATE ${open62541_LIBRARIES})
 
 ##########################
 # Build Selected Targets #
@@ -1491,7 +1493,6 @@ install(TARGETS open62541
 
 set(open62541_install_tools_dir share/open62541)
 set(open62541_install_schema_dir share/open62541/schema)
-set(open62541_crypto_plugin ${UA_ENABLE_ENCRYPTION})
 
 # Create open62541Config.cmake
 include(CMakePackageConfigHelpers)
@@ -1500,8 +1501,7 @@ configure_package_config_file("${CMAKE_CURRENT_SOURCE_DIR}/tools/cmake/open62541
                               "${CMAKE_CURRENT_BINARY_DIR}/open62541Config.cmake"
                               INSTALL_DESTINATION "${cmake_configfile_install}"
                               PATH_VARS open62541_install_tools_dir
-                                        open62541_install_schema_dir
-                                        open62541_crypto_plugin)
+                                        open62541_install_schema_dir)
 install(FILES "${CMAKE_CURRENT_BINARY_DIR}/open62541Config.cmake"
               "${CMAKE_CURRENT_SOURCE_DIR}/tools/cmake/open62541Macros.cmake"
         DESTINATION "${cmake_configfile_install}")
@@ -1527,10 +1527,13 @@ export(TARGETS open62541
 if(UA_ENABLE_AMALGAMATION)
     set(PC_EXTRA_CFLAGS "-DUA_ENABLE_AMALGAMATION")
 endif()
-set(pkgcfglibs "-lopen62541")
-foreach(lib ${open62541_LIBRARIES})
-    set(pkgcfglibs "${pkgcfglibs} -l${lib}")
+
+set(pkgcfgpubliclibs "")
+foreach(lib ${open62541_PUBLIC_LIBRARIES})
+    set(pkgcfgpubliclibs "${pkgcfgpubliclibs}-l${lib} ")
 endforeach()
+
+string(REPLACE ";" ", " pkgcfglibs "${open62541_LIBRARIES}")
 configure_file(tools/open62541.pc.in ${PROJECT_BINARY_DIR}/src_generated/open62541.pc @ONLY)
 
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")

tools/cmake/open62541Config.cmake.in

@@ -3,20 +3,8 @@ include("${CMAKE_CURRENT_LIST_DIR}/open62541Targets.cmake")
 
 set_and_check(open62541_TOOLS_DIR @PACKAGE_open62541_install_tools_dir@ CACHE PATH "Path to the directory that contains the tooling of the stack")
 set_and_check(UA_SCHEMA_DIR @PACKAGE_open62541_install_schema_dir@ CACHE PATH "Path to the directory that contains the schema files")
-set(open62541_crypto_plugin @open62541_crypto_plugin@)
 
 # Macros for datatype generation, nodeset compiler, etc.
 include("${CMAKE_CURRENT_LIST_DIR}/open62541Macros.cmake")
 
 check_required_components(open62541)
-
-include(CMakeFindDependencyMacro)
-if(open62541_crypto_plugin STREQUAL "MBEDTLS")
-  list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
-  find_dependency(MbedTLS REQUIRED)
-  list(REMOVE_AT CMAKE_MODULE_PATH -1)
-elseif(open62541_crypto_plugin STREQUAL "OPENSSL")
-  find_dependency(OpenSSL REQUIRED)
-elseif(open62541_crypto_plugin STREQUAL "LIBRESSL")
-  find_dependency(LibreSSL REQUIRED)
-endif()

tools/open62541.pc.in

@@ -5,5 +5,6 @@ includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
 Name: open62541
 Description: open62541 is an open source C (C99) implementation of OPC UA
 Version: @OPEN62541_VER_MAJOR@.@OPEN62541_VER_MINOR@.@OPEN62541_VER_PATCH@@OPEN62541_VER_LABEL@
-Libs: -L${libdir} @pkgcfglibs@
+Libs: -L${libdir} -lopen62541 @pkgcfgpubliclibs@
+Requires.private: @pkgcfglibs@
 Cflags: -I${includedir} @PC_EXTRA_CFLAGS@