Split up objects in makefile

Makefile

@@ -67,24 +67,24 @@ watch:
 .SUFFIXES:
 
 define common_rules_for_dir
-$(2)%.o: $(srcdir)/$(2)%.c
+$(2)%.o: $(srcdir)/$(2)%.c config.mak
 	@mkdir -p $$(dir $$@)
 	@echo "CC      $$@"
 	$(Q)$(CC) -c -o $$@ $$($(1)-cflags) $$<
 
-$(2)%.o: $(srcdir)/$(2)%.S
+$(2)%.o: $(srcdir)/$(2)%.S config.mak
 	@mkdir -p $$(dir $$@)
 	@echo "AS      $$@"
 	$(Q)$(CC) -c -o $$@ $$($(1)-cflags) $$<
 
 # https://www.gnu.org/software/make/manual/html_node/Automatic-Prerequisites.html
-$(2)%.d: $(srcdir)/$(2)%.c
+$(2)%.d: $(srcdir)/$(2)%.c config.mak
 	@mkdir -p $$(dir $$@)
 	@set -e; rm -f $$@; \
 	trap 'rm -f $$@.$$$$$$$$' EXIT; \
 	$(CC) -M $$($(1)-cflags) $$< > $$@.$$$$$$$$; \
 	sed 's,$$(notdir $$(@:%.d=%.o))[ :]*,$$(@:%.d=%.o) $$@ : ,g' < $$@.$$$$$$$$ > $$@
-$(2)%.d: $(srcdir)/$(2)%.S
+$(2)%.d: $(srcdir)/$(2)%.S config.mak
 	@mkdir -p $$(dir $$@)
 	@set -e; rm -f $$@; \
 	trap 'rm -f $$@.$$$$$$$$' EXIT; \

configure

@@ -117,8 +117,6 @@ if [[ -e Makefile ]]; then
 	if [[ "$(realpath Makefile)" != "$(realpath "$repo/Makefile")" ]]; then
 		printf >&2 './configure: a different Makefile already exists\n'
 		exit 1
-	else
-		printf >&2 "./configure: already configured; you probably want to run \`make clean' to get rid of old build artifacts\n"
 	fi
 else
 	ln -s "$repo/Makefile" Makefile

src/kernel/arch/riscv64/include.mak

@@ -8,7 +8,13 @@ kernel-cflags += \
 	-mabi=lp64 \
 	-mcmodel=medany
 kernel-objs-asm += arch/riscv64/start
-kernel-objs-c += arch/riscv64/backtrace arch/riscv64/hart_locals arch/riscv64/paging arch/riscv64/panic arch/riscv64/physical arch/riscv64/random arch/riscv64/sbi
+kernel-objs-c += arch/riscv64/backtrace
+kernel-objs-c += arch/riscv64/hart_locals
+kernel-objs-c += arch/riscv64/paging
+kernel-objs-c += arch/riscv64/panic
+kernel-objs-c += arch/riscv64/physical
+kernel-objs-c += arch/riscv64/random
+kernel-objs-c += arch/riscv64/sbi
 
 $(eval $(call compute_component_variables,kernel))
 

src/kernel/include.mak

@@ -21,9 +21,29 @@ kernel-cflags = $(CFLAGS) \
 kernel-cflags += -fdata-sections -ffunction-sections
 kernel-ldflags += -Wl,--gc-sections
 kernel-dir = src/kernel
-kernel-objs-asm =
-kernel-objs-c = devicetree main panic print random selftest swar_test symbolicate
-kernel-objs-c += builtins/bzero builtins/explicit_bzero builtins/memcpy builtins/memcmp builtins/memset builtins/strcmp builtins/strlen
-kernel-objs-c += crypto/subtle/rfc7539 crypto/subtle/rfc7693
-kernel-objs-c += mm/alloc mm/alloc/block mm/alloc/heap mm/alloc/init mm/alloc/page mm/alloc/segment mm/physical_alloc mm/virtual_alloc
+kernel-objs-c += builtins/bzero
+kernel-objs-c += builtins/explicit_bzero
+kernel-objs-c += builtins/memcmp
+kernel-objs-c += builtins/memcpy
+kernel-objs-c += builtins/memset
+kernel-objs-c += builtins/strcmp
+kernel-objs-c += builtins/strlen
+kernel-objs-c += crypto/subtle/rfc7539
+kernel-objs-c += crypto/subtle/rfc7693
+kernel-objs-c += devicetree
+kernel-objs-c += main
+kernel-objs-c += mm/alloc
+kernel-objs-c += mm/alloc/block
+kernel-objs-c += mm/alloc/heap
+kernel-objs-c += mm/alloc/init
+kernel-objs-c += mm/alloc/page
+kernel-objs-c += mm/alloc/segment
+kernel-objs-c += mm/physical_alloc
+kernel-objs-c += mm/virtual_alloc
+kernel-objs-c += panic
+kernel-objs-c += print
+kernel-objs-c += random
+kernel-objs-c += selftest
+kernel-objs-c += swar_test
+kernel-objs-c += symbolicate
 include $(srcdir)/src/kernel/arch/$(arch)/include.mak