diff options
| author | Marvin Borner | 2020-07-29 14:58:34 +0200 |
|---|---|---|
| committer | Marvin Borner | 2020-07-29 15:00:35 +0200 |
| commit | f0e58643098efafecf77d2b9115dfff16f931868 (patch) | |
| tree | 6af2ba07e0794c55c6a4ac0d5f930bd53a54354e /Makefile | |
| parent | f28c0aae0d8fe6ccd48f3bca711360cb650c4d11 (diff) | |
Switched to -Os flag and fixed issues with it
Somehow the insl function gets optimized to one instruction so I need
a gcc attribute to exclude this function from optimization. I may fix
this in the future though. Anyways, the kernel is waay smaller now! :)
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 7 |
1 files changed, 4 insertions, 3 deletions
@@ -22,17 +22,17 @@ LD = cross/opt/bin/i686-elf-ld AS = nasm # Flags to make the binary smaller TODO: Remove after indirect pointer support! -CSFLAGS = -fno-stack-protector -fomit-frame-pointer -ffunction-sections -fdata-sections -Wl,--gc-sections -mpreferred-stack-boundary=2 -falign-functions=1 -falign-jumps=1 -falign-loops=1 -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-math-errno -fno-unroll-loops -fmerge-all-constants -fno-ident -ffast-math +CSFLAGS = -mpreferred-stack-boundary=2 -fno-asynchronous-unwind-tables -Os # TODO: Use lib as external library -CFLAGS = $(CSFLAGS) -Wall -Wextra -nostdlib -nostdinc -ffreestanding -fno-builtin -fno-pic -mgeneral-regs-only -std=c99 -m32 -pedantic-errors -Isrc/lib/inc/ -Isrc/inc/ -c +CFLAGS = $(CSFLAGS) -Wall -Wextra -nostdlib -nostdinc -ffreestanding -fno-builtin -fno-pic -mgeneral-regs-only -std=c99 -m32 -pedantic-errors -Isrc/lib/inc/ -Isrc/inc/ ASFLAGS = -f elf32 all: compile clean %.o: %.c - @$(CC) $(CFLAGS) $< -o $@ + @$(CC) -c $(CFLAGS) $< -o $@ %_asm.o: %.asm @$(AS) $(ASFLAGS) $< -o $@ @@ -43,6 +43,7 @@ compile: kernel @mkdir -p build/ @$(AS) -f bin src/entry.asm -o build/boot.bin @$(LD) -N -emain -Ttext 0x00050000 -o build/kernel.bin $(COBJS) --oformat binary + @$(CC) $(CFLAGS) -emain -o build/debug.o $(COBJS) clean: @find src/ -name "*.o" -type f -delete |