smol/Makefile

113 lines
3.6 KiB
Makefile

OBJDIR := obj
BINDIR := bin
SRCDIR := rt
PYDIR := src
LDDIR := ld
TESTDIR:= test
BITS ?= $(shell getconf LONG_BIT)
# -mpreferred-stack-boundary=3 messes up the stack and kills SSE!
#COPTFLAGS=-Os -fvisibility=hidden -fwhole-program -fno-plt \
# -ffast-math -funsafe-math-optimizations -fno-stack-protector -fomit-frame-pointer \
# -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
COPTFLAGS=-Os -fno-plt -fno-stack-protector -fno-stack-check -fno-unwind-tables \
-fno-asynchronous-unwind-tables -fomit-frame-pointer -ffast-math -no-pie \
-fno-pic -fno-PIE -ffunction-sections -fdata-sections -fno-plt \
-fmerge-all-constants -mno-fancy-math-387 -mno-ieee-fp
CXXOPTFLAGS=$(COPTFLAGS) -fno-exceptions \
-fno-rtti -fno-enforce-eh-specs -fnothrow-opt -fno-use-cxa-get-exception-ptr \
-fno-implicit-templates -fno-threadsafe-statics -fno-use-cxa-atexit
CFLAGS=-Wall -Wextra -Wpedantic -std=gnu11 -nostartfiles -fno-PIC $(COPTFLAGS) #-DUSE_DL_FINI
CXXFLAGS=-Wall -Wextra -Wpedantic -std=c++11 $(CXXOPTFLAGS) -nostartfiles -fno-PIC
ASFLAGS=-I $(SRCDIR)/
LDFLAGS_ :=
ifeq ($(BITS),32)
# I think prescott is basically nocona but 32-bit only, althought I'm not sure
# if this one is optimal
CFLAGS += -m32 -march=prescott
LDFLAGS += -m32
ASFLAGS += -f elf32
LDFLAGS_ := -m32
else
# I've heard nocona gets slightly smaller binaries than core2
CFLAGS += -m64 -march=nocona
LDFLAGS += -m64
ASFLAGS += -f elf64
LDFLAGS_ := -m64
endif
LDFLAGS += -nostartfiles -nostdlib
LDFLAGS_ := $(LDFLAGS_) -T $(LDDIR)/link.ld -Wl,--oformat=binary $(LDFLAGS)
CFLAGS += -m$(BITS) $(shell pkg-config --cflags sdl2)
CXXFLAGS += -m$(BITS) $(shell pkg-config --cflags sdl2)
LIBS=-lc
SMOLFLAGS +=
ASFLAGS += -DALIGN_STACK -DUSE_INTERP #-DUSE_DNLOAD_LOADER
#-DUSE_DNLOAD_LOADER #-DUSE_DT_DEBUG #-DUSE_DL_FINI #-DNO_START_ARG #-DUNSAFE_DYNAMIC
NASM ?= nasm
PYTHON3 ?= python3
all: $(BINDIR)/hello-crt $(BINDIR)/sdl-crt $(BINDIR)/flag $(BINDIR)/hello-_start
LIBS += $(filter-out -pthread,$(shell pkg-config --libs sdl2)) -lX11 #-lGL
clean:
@$(RM) -vrf $(OBJDIR) $(BINDIR)
%/:
@mkdir -vp "$@"
# TODO: handle this in a more graceful and future-proof way!
ifneq ($(findstring (GCC) 9,$(shell $(CC) --version)),)
INCLINKOPT := -flinker-output=nolto-rel
else
ifneq ($(findstring (GCC) 10,$(shell $(CC) --version)),)
INCLINKOPT := -flinker-output=nolto-rel
else
INCLINKOPT :=
endif
endif
.SECONDARY:
$(OBJDIR)/%.lto.o: $(SRCDIR)/%.c $(OBJDIR)/
$(CC) -flto $(CFLAGS) -c "$<" -o "$@"
$(OBJDIR)/%.lto.o: $(TESTDIR)/%.c $(OBJDIR)/
$(CC) -flto $(CFLAGS) -c "$<" -o "$@"
$(OBJDIR)/%.o: $(SRCDIR)/%.c $(OBJDIR)/
$(CC) $(CFLAGS) -c "$<" -o "$@"
$(OBJDIR)/%.o: $(TESTDIR)/%.c $(OBJDIR)/
$(CC) $(CFLAGS) -c "$<" -o "$@"
$(OBJDIR)/%.start.o: $(OBJDIR)/%.lto.o $(OBJDIR)/crt1.lto.o
$(CC) $(LDFLAGS) -r $(INCLINKOPT) -o "$@" $^
$(OBJDIR)/symbols.%.asm: $(OBJDIR)/%.o
$(PYTHON3) $(PYDIR)/smol.py $(SMOLFLAGS) $(LIBS) "$<" "$@"
$(OBJDIR)/stub.%.o: $(OBJDIR)/symbols.%.asm $(SRCDIR)/header32.asm \
$(SRCDIR)/loader32.asm
$(NASM) $(ASFLAGS) $< -o $@
$(OBJDIR)/stub.%.start.o: $(OBJDIR)/symbols.%.start.asm $(SRCDIR)/header32.asm \
$(SRCDIR)/loader32.asm
$(NASM) $(ASFLAGS) $< -o $@
$(BINDIR)/%: $(OBJDIR)/%.o $(OBJDIR)/stub.%.o $(BINDIR)/
$(CC) -Wl,-Map=$(BINDIR)/$*.map $(LDFLAGS_) $(OBJDIR)/$*.o $(OBJDIR)/stub.$*.o -o "$@"
./rmtrailzero.py "$@" "$(OBJDIR)/$(notdir $@)" && mv "$(OBJDIR)/$(notdir $@)" "$@" && chmod +x "$@"
$(BINDIR)/%-crt: $(OBJDIR)/%.start.o $(OBJDIR)/stub.%.start.o $(BINDIR)/
$(CC) -Wl,-Map=$(BINDIR)/$*-crt.map $(LDFLAGS_) $(OBJDIR)/$*.start.o $(OBJDIR)/stub.$*.start.o -o "$@"
.PHONY: all clean