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src/Makefile

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+EXEC := bringelle
+CC := gcc -c -m32 -fno-pie -fno-builtin
+
+UTILS_SRC := $(wildcard utils/*.c)
+
+all: $(EXEC)
+
+$(EXEC): boot.o utils.o bringelle.o
+	for obj in $^ ;\
+	do \
+		objcopy --remove-section .note.gnu.property $${obj} ; \
+	done
+	ld -Ttext=0x00100000 -melf_i386 -nostdlib --oformat=binary -o bringelle $^ 
+
+bringelle.o: bringelle.c
+	$(CC) $^
+
+utils.o: $(UTILS_SRC)
+	$(CC) $^ -o $@
+
+boot.o: ./boot/boot.S
+	as --32 -o $@ $^ -mx86-used-note=no
+
+clean:
+	- rm $(EXEC)
+	- rm ./*.o
+
+.PHONY: clean
+
+

src/boot/boot.S

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+.extern bringelle
+.globl  _start
+.text
+
+.set MB_MAGIC, 0x1BADB002
+.set MB_FLAGS, 0x00010000
+.set MB_CHECKSUM, -(MB_MAGIC+MB_FLAGS)
+.set MB_HEADER_ADDR, mb_header
+.set MB_LOAD_ADDR, mb_header
+.set MB_LOAD_END_ADDR, 0x0
+.set MB_BSS_END_ADDR, 0x0
+.set MB_ENTRY_ADDR, _start
+
+mb_header:
+.align 4
+.long MB_MAGIC
+.long MB_FLAGS
+.long MB_CHECKSUM
+.long MB_HEADER_ADDR
+.long MB_LOAD_ADDR
+.long MB_LOAD_END_ADDR
+.long MB_BSS_END_ADDR
+.long MB_ENTRY_ADDR
+
+_start:
+    call bringelle
+

src/bringelle.c

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+#include "utils/print.h"
+
+
+
+
+void bringelle(){
+  putchar('L');
+  putchar('L');
+
+  while(1);
+}

src/utils/print.c

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+#include "print.h"
+
+
+void putchar(char c){
+  char *video=(char *)0xB8000;
+  video[0]=c;
+}

src/utils/print.h

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+#ifndef PRINT_H
+#define PRINT_H
+
+
+void putchar(char);
+
+#endif