CMake: create cpio archive in app folder

Do not pollute the root folder.

Signed-off-by: Axel Heider <[email protected]>

camkes_vm_helpers.cmake

@@ -70,11 +70,21 @@ function(DefineCAmkESVMFileServer)
     get_target_property(fileserver_images vm_fserver_config FILES)
     get_target_property(fileserver_deps vm_fserver_config DEPS)
     # Build CPIO archive given the defined kernel and rootfs images
+    set(CPIO_ARCHIVE "${CMAKE_CURRENT_BINARY_DIR}/file_server_archive.o")
     include(cpio)
-    MakeCPIO(file_server_archive.o "${fileserver_images}" DEPENDS "${fileserver_deps}")
-    add_library(fileserver_cpio STATIC EXCLUDE_FROM_ALL file_server_archive.o)
-    set_property(TARGET fileserver_cpio PROPERTY LINKER_LANGUAGE C)
-    ExtendCAmkESComponentInstance(FileServer fserv LIBS fileserver_cpio)
+    MakeCPIO("${CPIO_ARCHIVE}" "${fileserver_images}" DEPENDS "${fileserver_deps}")
+    # Build a library from the CPIO archive
+    set(FILESERVER_LIB "fileserver_cpio")
+    add_library(${FILESERVER_LIB} STATIC EXCLUDE_FROM_ALL "${CPIO_ARCHIVE}")
+    set_target_properties(
+        ${FILESERVER_LIB}
+        PROPERTIES
+            ARCHIVE_OUTPUT_DIRECTORY
+            "${CMAKE_CURRENT_BINARY_DIR}"
+            LINKER_LANGUAGE
+            "C"
+    )
+    ExtendCAmkESComponentInstance(FileServer fserv LIBS ${FILESERVER_LIB})
 endfunction(DefineCAmkESVMFileServer)
 
 # Function for declaring the CAmkESVM root server. Taking the camkes application