From a78033acc941fc4bcf6188f1d48fd8e012673fff Mon Sep 17 00:00:00 2001
From: EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com>
Date: Thu, 15 Jun 2023 22:36:39 -0400
Subject: initial commit

---
 kernel/makefile | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 kernel/makefile

(limited to 'kernel/makefile')

diff --git a/kernel/makefile b/kernel/makefile
new file mode 100644
index 0000000..ced9659
--- /dev/null
+++ b/kernel/makefile
@@ -0,0 +1,83 @@
+# Kernel makefile
+
+ifndef GAS
+	GAS = i686-elf-as
+endif
+
+ifndef CFLAGS
+	CFLAGS = -ffreestanding -Wall -Wextra -g -std=gnu99 -O2 -Iinclude
+	CFLAGS += --sysroot="$(SYSROOT)"
+	CFLAGS += -isystem="/usr/include"
+endif
+
+ifndef CXXFLAGS
+	CXXFLAGS = -ffreestanding -Wall -Wextra -fno-exceptions -fno-rtti -D__is_kernel -g -O2 -Iinclude
+	CXXFLAGS += -Iinclude
+	CXXFLAGS += --sysroot="$(SYSROOT)"
+	CXXFLAGS += -isystem="/usr/include"
+endif
+
+ifndef LDFLAGS
+	LDFLAGS = -T arch/$(ARCH)/linker.ld -ffreestanding -g -O2 -Iinclude
+	LDFLAGS += --sysroot="$(SYSROOT)"
+	LDFLAGS += -isystem="/usr/include"
+endif
+
+ifndef SYSROOT
+	$(error No sysroot specified)
+endif
+
+
+LIBS = -nostdlib -lgcc
+
+#Find all the source files
+C_SOURCES := $(shell find $(PWD)/kernel -type f -name '*.c')
+CPP_SOURCES := $(shell find $(PWD)/kernel -type f -name '*.cpp')
+HEADERS := $(shell find $(PWD) -type f -name '*.h')
+ASMFILES := $(shell find $(PWD) -type f -name '*.asm' ! -name 'crti.asm' ! -name 'crtn.asm')
+GASFILES := $(wildcard *.s)
+CRTBEGIN := $(shell $(CXX) $(CXXFLAGS) -print-file-name=crtbegin.o)
+CRTEND := $(shell $(CXX) $(CXXFLAGS) -print-file-name=crtend.o)
+
+OBJECTS := $(C_SOURCES:.c=.o)
+OBJECTS += ${CPP_SOURCES:.cpp=.o}
+OBJECTS += ${ASMFILES:.asm=.o}
+
+LINKLST := crti.o
+LINKLST += $(CRTBEGIN)
+LINKLST += $(OBJECTS)
+LINKLST += $(LIBS)
+LINKLST += $(CRTEND)
+LINKLST += crtn.o
+
+.PHONY: all crt clean
+
+all: crti.o crtn.o kernel.bin
+
+kernel.bin: ${OBJECTS}
+	$(info [INFO] Linking kernel)
+	$(CXX) ${LDFLAGS} -o ${PREFIX}/kernel.bin $(LINKLST)
+
+%.o: %.cpp ${HEADERS}
+	$(info [INFO] Compiling $<)
+	$(CXX) ${CXXFLAGS} -c $< -o $@
+
+%.o: %.c $(HEADERS)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+%.o: %.asm
+	$(info [INFO] Assembling assembly)
+	$(NASM) $< -felf32 -o $@ -g
+
+crti.o: 
+	$(NASM) arch/$(ARCH)/crti.asm -felf32 -o $@
+
+crtn.o: 
+	$(NASM) arch/$(ARCH)/crtn.asm -felf32 -o $@
+
+install-headers:
+	cp -r --preserve=timestamps include $(SYSROOT)/usr/include
+
+clean:
+	$(info [INFO] Cleaning)
+	rm ${OBJECTS} crti.o crtn.o
\ No newline at end of file
-- 
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