fix:build:cmake:fix in-tree cmake build circular dependency warnings (#…

…1122)

Only copy files when SOURCE and DESTINATION directory differs.
No need to copy files into themselves when doing in-tree build.

Removes annoying warning.

```
make[2]: Circular navit/textures/diagonal-stripes.svg <- navit/textures/diagonal-stripes.svg dependency dropped.
```

Signed-off-by: David Heidelberg <david@ixit.cz>

navit/icons/CMakeLists.txt

@@ -127,6 +127,7 @@ foreach (IMAGE_SRC ${FILES_TO_PNG})
 
 endforeach()
 
+if (NOT ${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR} )
 foreach (IMAGE_FILE ${IMAGES_TO_COPY})
 	add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${IMAGE_FILE}"
 		DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${IMAGE_FILE}"
@@ -135,6 +136,7 @@ foreach (IMAGE_FILE ${IMAGES_TO_COPY})
 		)
 	list(APPEND IMAGE_TARGETS "${CMAKE_CURRENT_BINARY_DIR}/${IMAGE_FILE}")
 endforeach()
+endif()
 
 add_custom_target(images ALL DEPENDS ${IMAGE_TARGETS})
 add_custom_target(images_resource COMMAND mkdir -p ../resources/share/navit/xpm COMMAND cp ${IMAGE_TARGETS} ../resources/share/navit/xpm)

navit/textures/CMakeLists.txt

@@ -110,6 +110,7 @@ foreach (TEXTURE_SRC ${FILES_TO_PNG})
 
 endforeach()
 
+if (NOT ${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR} )
 foreach (TEXTURE_FILE ${TEXTURES_TO_COPY})
 	add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${TEXTURE_FILE}"
 		DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${TEXTURE_FILE}"
@@ -118,6 +119,7 @@ foreach (TEXTURE_FILE ${TEXTURES_TO_COPY})
 		)
 	list(APPEND TEXTURE_TARGETS "${CMAKE_CURRENT_BINARY_DIR}/${TEXTURE_FILE}")
 endforeach()
+endif()
 
 add_custom_target(textures ALL DEPENDS ${TEXTURE_TARGETS})
 add_custom_target(textures_resource COMMAND mkdir -p ../resources/share/navit/textures COMMAND cp ${TEXTURE_TARGETS} ../resources/share/navit/textures)