build: ensure all symbols are included

CMakeLists.txt

@@ -72,10 +72,17 @@ add_subdirectory(lib)
 target_include_directories(ardix INTERFACE ${ARDIX_INCLUDE_DIRS})
 target_compile_options(ardix INTERFACE ${ARDIX_COMPILE_OPTIONS})
 
-# TODO: don't use this hack lmao
-file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/empty.c "")
-add_executable(ardix.elf ${CMAKE_CURRENT_BINARY_DIR}/empty.c)
-target_link_libraries(ardix.elf PRIVATE ardix)
+add_custom_target(ardix.elf DEPENDS ardix)
+add_custom_command(
+	TARGET ardix.elf
+	COMMAND ${CMAKE_LINKER}
+	ARGS ${ARDIX_LINKER_FLAGS} -o ardix.elf
+		$<TARGET_FILE:ardix_arch>
+		$<TARGET_FILE:ardix_init>
+		$<TARGET_FILE:ardix_kernel>
+		$<TARGET_FILE:ardix_kernel_fs>
+		$<TARGET_FILE:ardix_lib>
+)
 
 add_custom_target(ardix.bin ALL DEPENDS ardix.elf)
 add_custom_command(

arch/at91sam3x8e/toolchain.cmake

@@ -19,7 +19,12 @@ set(CMAKE_STRIP		${TOOLCHAIN_PATH}/arm-none-eabi-strip${CMAKE_EXECUTABLE_SUFFIX}
 set(CMAKE_C_FLAGS "-Os -nodefaultlibs -nostartfiles -mcpu=cortex-m3 -mthumb -mabi=aapcs -march=armv7-m -masm-syntax-unified")
 set(CMAKE_C_FLAGS_DEBUG -g)
 
-set(CMAKE_EXE_LINKER_FLAGS "-T${CMAKE_CURRENT_LIST_DIR}/config.ld -T${CMAKE_CURRENT_LIST_DIR}/flash.ld")
+set(CMAKE_LINKER_FLAGS "-T${CMAKE_CURRENT_LIST_DIR}/config.ld -T${CMAKE_CURRENT_LIST_DIR}/flash.ld --whole-archive")
+set(ARDIX_LINKER_FLAGS
+	-T${CMAKE_CURRENT_LIST_DIR}/config.ld
+	-T${CMAKE_CURRENT_LIST_DIR}/flash.ld
+	--whole-archive
+)
 
 set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)

kernel/CMakeLists.txt

@@ -6,6 +6,8 @@ target_link_libraries(ardix INTERFACE ardix_kernel)
 target_compile_options(ardix_kernel PRIVATE ${ARDIX_COMPILE_OPTIONS})
 target_include_directories(ardix_kernel PRIVATE ${ARDIX_INCLUDE_DIRS})
 
+add_subdirectory(fs)
+
 target_sources(ardix_kernel PRIVATE
 	device.c
 	dma.c