[CMake] Install qt platform shared libraries with Conan.

conanfile.py

@@ -22,6 +22,8 @@ class OpenGeoSysConan(ConanFile):
         self.copy(pattern="*.dll", dst="bin", src="bin")
         self.copy(pattern="*.dylib*", dst="bin", src="lib")
         self.copy(pattern="*.framework*", dst="bin", src="lib")
+        self.copy(pattern="*.dll", dst="bin/platforms", src="plugins/platforms")
+        self.copy(pattern="*.dylib*", dst="bin/platforms", src="plugins/platforms")
 
     def build(self):
         cmake = CMake(self.settings)

scripts/cmake/packaging/Pack.cmake

@@ -102,15 +102,18 @@ cpack_add_component(ogs_docs
     GROUP Utilities
 )
 
+if(USE_CONAN)
+    # Install shared libraries, copied to bin-dir
+    foreach(PATTERN "*.dll" "*.dylib")
+        file(GLOB MATCHED_FILES ${EXECUTABLE_OUTPUT_PATH}/${PATTERN})
+        install(FILES ${MATCHED_FILES} DESTINATION bin)
+    endforeach()
 
-# Install shared libraries, copied to bin-dir from e.g Conan
-foreach(PATTERN "*.dll" "*.dylib")
-    file(GLOB MATCHED_FILES ${EXECUTABLE_OUTPUT_PATH}/${PATTERN})
-    # message(STATUS ${MATCHED_FILES})
-    install(FILES ${MATCHED_FILES} DESTINATION bin)
-endforeach()
+    # macOS frameworks are directories, exclude header files
+    file(GLOB MATCHED_DIRECTORIES "${EXECUTABLE_OUTPUT_PATH}/*.framework")
+    install(DIRECTORY ${MATCHED_DIRECTORIES} DESTINATION bin
+        PATTERN "Headers" EXCLUDE)
 
-# macOS frameworks are directories, exclude header files
-file(GLOB MATCHED_DIRECTORIES "${EXECUTABLE_OUTPUT_PATH}/*.framework")
-install(DIRECTORY ${MATCHED_DIRECTORIES} DESTINATION bin
-    PATTERN "Headers" EXCLUDE)
+    # Install Qt platform shared libraries
+    install(DIRECTORY ${EXECUTABLE_OUTPUT_PATH}/platforms DESTINATION bin OPTIONAL)
+endif()