67 lines
1.5 KiB
Makefile
67 lines
1.5 KiB
Makefile
# Makefile for libmath shared library
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# Builds libmath.lib as an ELF shared object (ET_DYN).
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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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LD := $(TOOLCHAIN_PREFIX)ld
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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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# Build as PIC so the final ET_DYN image can be relocated by the kernel loader.
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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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-fPIC \
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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-sse \
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-mno-sse2 \
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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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# Linker flags for a bare-metal ELF shared object.
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override LDFLAGS := \
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-shared \
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--build-id=none \
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--hash-style=sysv \
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-m elf_x86_64 \
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-z max-page-size=0x1000
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# Output
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OUTDIR := ../../bin/os
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LIBNAME := libmath
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LIBSRC := src/libmath.cpp
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.PHONY: all clean
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all: $(OUTDIR)/$(LIBNAME).lib
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$(OUTDIR)/$(LIBNAME).lib: $(LIBSRC) Makefile
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@mkdir -p $(OUTDIR)
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rm -f $(OUTDIR)/$(LIBNAME).lib.sym
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$(CXX) $(CXXFLAGS) -c $(LIBSRC) -o src/libmath.o
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$(LD) $(LDFLAGS) src/libmath.o -o $@
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clean:
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rm -rf ../../bin/os/$(LIBNAME).lib ../../bin/os/$(LIBNAME).lib.sym src/libmath.o
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