82 lines
2.3 KiB
Makefile
82 lines
2.3 KiB
Makefile
# Makefile for libhello shared library
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# Builds libhello.lib at fixed address 0x400000 (relocated at load time)
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# Target architecture.
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ARCH := x86_64
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# Toolchain
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TOOLCHAIN_PREFIX := $(shell cd ../../.. && pwd)/toolchain/local/bin/x86_64-elf-
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CXX := $(TOOLCHAIN_PREFIX)g++
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NM := $(TOOLCHAIN_PREFIX)nm
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STRIP := $(TOOLCHAIN_PREFIX)strip
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# Compiler flags: freestanding, no stdlib
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override CXXFLAGS := \
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-std=gnu++20 \
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-g -O2 -pipe \
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-Wall \
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-Wextra \
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-nostdinc \
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-ffreestanding \
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-fno-stack-protector \
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-fno-stack-check \
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-fno-PIC \
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-fno-rtti \
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-fno-exceptions \
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-ffunction-sections \
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-fdata-sections \
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-m64 \
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-march=x86-64 \
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-mno-80387 \
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-mno-mmx \
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-mno-red-zone \
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-mcmodel=small \
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-I ../../include \
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-isystem ../../include/libc \
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-isystem ../../include/montauk \
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-isystem ../../include/gui \
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-isystem ../../../kernel/freestnd-c-hdrs/x86_64/include \
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-isystem ../../../kernel/freestnd-cxx-hdrs/x86_64/include
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# Linker flags: freestanding static ELF at fixed address
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# Note: NOT using --gc-sections so all functions are kept
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override LDFLAGS := \
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-nostdlib \
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-static \
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-Wl,--build-id=none \
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-Wl,-m,elf_x86_64 \
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-T link.ld
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# Output
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OUTDIR := ../../bin/os
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LIBNAME := libhello
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LIBSRC := src/libhello.cpp
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.PHONY: all clean
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all: $(OUTDIR)/$(LIBNAME).lib $(OUTDIR)/$(LIBNAME).lib.sym
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$(OUTDIR):
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mkdir -p $@
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src/libhello.o: src/libhello.cpp Makefile | $(OUTDIR)
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$(CXX) $(CXXFLAGS) -c src/libhello.cpp -o $@
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src/stb_truetype_impl.o: src/stb_truetype_impl.cpp Makefile | $(OUTDIR)
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$(CXX) $(CXXFLAGS) -c src/stb_truetype_impl.cpp -o $@
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$(OUTDIR)/$(LIBNAME).lib: src/libhello.o src/stb_truetype_impl.o
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$(CXX) $(CXXFLAGS) $(LDFLAGS) src/libhello.o src/stb_truetype_impl.o -o $@
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# Generate symbol file from nm output
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# Format: "symbol_name,offset_in_hex"
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$(OUTDIR)/$(LIBNAME).lib.sym: $(OUTDIR)/$(LIBNAME).lib
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@mkdir -p $(OUTDIR)
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@echo "# Symbol table for $(LIBNAME)" > $@
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@echo "# This file maps symbol names to offsets from library base" >> $@
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@$(NM) $(OUTDIR)/$(LIBNAME).lib | grep ' T ' | awk '{printf "%s,0x%x\n", $$3, strtonum("0x" $$1) - 0x400000}' >> $@
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@echo "Generated symbol file: $@"
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clean:
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rm -rf ../../bin/os/$(LIBNAME).lib ../../bin/os/$(LIBNAME).lib.sym src/libhello.o src/stb_truetype_impl.o
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