Updated config

Makefile

@@ -1,20 +1,20 @@
 # Variables
-CC = i686-elf-gcc
-LD = i686-elf-ld
-AS = nasm
+CC := i686-elf-gcc
+LD := i686-elf-ld
+AS := nasm
 
-CFLAGS = -std=c17 -ffreestanding -fno-builtin -fno-stack-protector -fno-pie \
+CFLAGS := -g -std=c17 -ffreestanding -fno-builtin -fno-stack-protector -fno-pie \
 		 -Os -nostdinc -mgeneral-regs-only -m32 -march=i386 -Wall -Iinclude/c
-LDFLAGS = -z notext -melf_i386
-ASFLAGS =
-
-SRC = ./src
-BIN = ./bin
-C_FILES = calc edit
-FONTS = testfont term16n
+LDFLAGS := -z notext -melf_i386 -nostdlib
+ASFLAGS :=
 
 include make.config
 
+SRC := ./src
+BIN := ./bin
+C_FILES := calc edit
+FONTS := testfont term16n
+
 .PHONY: os clean run
 
 # Main compilation target
@@ -30,9 +30,9 @@ $(BIN):
 # Bootloader: This target is responsible for creating stage?.bin (1,2,3)
 bootloader: $(SRC)/stage1.asm $(SRC)/stage2.asm
 	@echo "Assembling $(SRC)/stage1.asm..."
-	@$(AS) $(ASFLAGS) -fbin -o $(BIN)/stage1.bin $(SRC)/stage1.asm
+	@$(AS) -fbin -o $(BIN)/stage1.bin $(SRC)/stage1.asm $(ASFLAGS) 
 	@echo "Assembling $(SRC)/stage2.asm..."
-	@$(AS) $(ASFLAGS) -fbin -o $(BIN)/stage2.bin $(SRC)/stage2.asm
+	@$(AS) -fbin -o $(BIN)/stage2.bin $(SRC)/stage2.asm $(ASFLAGS) 
 	@echo "Compiling $(SRC)/stage3.c..."
 	@$(CC) $(CFLAGS) -Iinclude -o $(BIN)/stage3.o -c $(SRC)/stage3.c
 	@$(LD) $(LDFLAGS) -T$(SRC)/stage3.ld --oformat binary -o $(BIN)/stage3.bin $(BIN)/stage3.o

make.config

@@ -1,2 +1,9 @@
-# Use a default resolution of 1920x1080 32bpp
-# ASFLAGS := $(ASFLAGS) -DDEF_RES
+# Kern Config
+# Uncomment a line to enable it
+# You may also change values
+
+#ASFLAGS := $(ASFLAGS) -D DEF_RES 		# Use default resolution variables
+ASFLAGS := $(ASFLAGS) -D DEF_W=1920		# Default width
+ASFLAGS := $(ASFLAGS) -D DEF_H=1080		# Default height
+ASFLAGS := $(ASFLAGS) -D DEF_BPP=32		# Default bpp
+

src/stage2.asm

@@ -368,12 +368,26 @@ CODE_SEG equ GDT.codeDescriptor - GDT.start
 DATA_SEG equ GDT.dataDescriptor - GDT.start
 
 ;; VBE Stuff
-;; XXX IF YOU WANT TO SELECT ANY VALUE IN THE SETUP, SET THESE TO ZERO XXX
-%ifdef DEF_RES
-width: dw 1920
+; Default width
+%ifndef DEF_W
+%define DEF_W 0
 %endif
-height: dw 1080
-bpp: db 32
+; Default height
+%ifndef DEF_H
+%define DEF_H 0
+%endif
+; Default bpp
+%ifndef DEF_BPP
+%define DEF_BPP 0
+%endif
+; Use defaults
+%ifdef DEF_RES
+width: dw DEF_W
+%else
+width: dw 0
+%endif
+height: dw DEF_H
+bpp: db DEF_BPP
 
 offset: dw 0
 _segment: dw 0 ; segment is a keyword