furtest/pepperOS
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Previously the build process removed everything and did all the build
again on each make invocation.
This fixes this behaviour with two changes.
First dynamically find the list of files to build using find instead of
a manually written list.
Then use implicit rules to only build files that need to be built again
instead of recompiling everything.
This commit is contained in:
furtest
2026-03-15 17:56:26 +01:00
parent 9fc55f98d8
commit 803ac0879b
1 changed files with 13 additions and 8 deletions
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21
Makefile
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@@ -1,7 +1,9 @@
BUILDDIR := build
ELFFILE := pepperk
SOURCES = src/sched/spinlock.c src/debug/misc.c src/io/term/flanterm_backends/fb.c src/io/term/flanterm.c src/debug/panic.c src/debug/stacktrace.c src/boot/boot.c src/sched/scheduler.c src/sched/process.c src/mem/heap/kheap.c src/mem/paging/vmm.c src/mem/paging/paging.c src/mem/paging/pmm.c src/string/string.c src/io/kbd/ps2.c src/io/serial/serial.c src/io/term/term.c src/idt/idt.c src/mem/gdt/gdt.c src/mem/misc/utils.c src/time/timer.c src/kmain.c
SRC := src
SOURCES := $(shell find src -name '*.c')
OBJFILES := $(patsubst $(SRC)/%.c, $(BUILDDIR)/%.o, $(SOURCES))
CC := x86_64-elf-gcc
CC_FLAGS=-Wall -Wextra -std=gnu99 -nostdlib -ffreestanding -fno-stack-protector -fno-omit-frame-pointer -fno-stack-check -fno-PIC -ffunction-sections -fdata-sections -mcmodel=kernel
@@ -11,17 +13,20 @@ LD := x86_64-elf-ld
.PHONY: build build-iso debug debug2 run clean
$(ELFFILE):
mkdir -p $(BUILDDIR)
rm -f *.o $(BUILDDIR)/*.o
$(CC) -g -c -Isrc $(SOURCES) $(CC_PROBLEMATIC_FLAGS) $(CC_FLAGS)
mv *.o $(BUILDDIR)/
$(ELFFILE): $(BUILDDIR) $(OBJFILES)
nasm -f elf64 src/idt/idt.S -o $(BUILDDIR)/idt_stub.o
$(LD) -o $(ELFFILE) -T linker.ld $(BUILDDIR)/*.o
$(LD) -o $(ELFFILE) -T linker.ld $(OBJFILES) $(BUILDDIR)/idt_stub.o
nm -n $(ELFFILE) | awk '$$2 ~ /[TtDdBbRr]/ {print $$1, $$3}' > symbols.map
python3 symbols.py
nasm -f elf64 symbols.S -o $(BUILDDIR)/symbols.o
$(LD) -o $(ELFFILE) -T linker.ld $(BUILDDIR)/*.o
$(LD) -o $(ELFFILE) -T linker.ld $(OBJFILES) $(BUILDDIR)/idt_stub.o
$(BUILDDIR):
@mkdir -p $(BUILDDIR)
$(BUILDDIR)/%.o: $(SRC)/%.c
mkdir -p $(dir $@)
$(CC) -g -c -Isrc $< $(CC_PROBLEMATIC_FLAGS) $(CC_FLAGS) -o $@
limine/limine:
rm -rf limine