diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 46 |
1 files changed, 27 insertions, 19 deletions
@@ -1,25 +1,30 @@ DO != echo > deps.mk # this could be done better -DEBUGFLAGS != [ $(RELEASE) ] && echo "-flto -O2" || echo "-O0 -ggdb3 -DDEBUG" -CFLAGS = -fno-pie -ffreestanding -nostdlib -std=c17 -Wall -Wextra -LINTFLAGS = -fsyntax-only +DEBUGFLAGS != [ $(RELEASE) ] \ + && echo "-flto -O2" \ + || echo "-O0 -ggdb3 -DDEBUG" + +CFLAGS = -ffreestanding -nostdlib -std=c17 -Wall -Wextra DEPFLAGS = -MT $@ -MMD -MP -MF $@.d +LINTFLAGS = -fsyntax-only +PREPROCESS = -E +LINKFLAGS = all: apos.bin # default values, overwrite if/when needed -ARCH ?= riscv -CROSS_COMPILE ?= riscv64-unknown-elf- +ARCH ?= riscv64 +CROSS_COMPILE ?= $(ARCH)-unknown-elf -# Common programs -CC := gcc -AR := ar -CPP := cpp -OBJCOPY ?= objcopy +OBJCOPY != [ $(LLVM) ] \ + && echo llvm-objcopy \ + || echo $(CROSS_COMPILE)-objcopy + +COMPILER != [ $(LLVM) ] \ + && echo clang --target="$(CROSS_COMPILE)" \ + || echo $(CROSS_COMPILE)-gcc -# This makes sure .bss is loaded into the binary -OBJCOPY_FLAGS ?= -Obinary --set-section-flags .bss=alloc,load,contents KERNEL_SOURCES != echo common/*.c common/uapi/*.c lib/*.c CLEANUP := build deps.mk kernel.* init.* apos.bin @@ -31,16 +36,19 @@ include arch/$(ARCH)/source.mk INCLUDE_FLAGS := -I include -I arch/$(ARCH)/include\ -include config.h -include arch/$(ARCH)/config.h -COMPILE = $(CROSS_COMPILE)$(CC) $(DEBUGFLAGS)\ +# This makes sure .bss is loaded into the binary +OBJCOPY_FLAGS ?= -Obinary --set-section-flags .bss=alloc,load,contents + +COMPILE = $(COMPILER) $(DEBUGFLAGS)\ $(CFLAGS) $(ARCH_FLAGS) $(DEPFLAGS) $(INCLUDE_FLAGS) -LINT = $(CROSS_COMPILE)$(CC) $(DEBUGFLAGS)\ +LINT = $(COMPILER) $(DEBUGFLAGS)\ $(CFLAGS) $(ARCH_FLAGS) $(LINTFLAGS) $(INCLUDE_FLAGS) -GENELF = $(CROSS_COMPILE)$(CC) $(DEBUGFLAGS)\ - $(CFLAGS) $(ARCH_FLAGS) $(INCLUDE_FLAGS) +GENELF = $(COMPILER) $(DEBUGFLAGS)\ + $(CFLAGS) $(ARCH_FLAGS) $(LINKFLAGS) $(INCLUDE_FLAGS) -GENLINK = $(CROSS_COMPILE)$(CPP) $(DEPFLAGS) $(INCLUDE_FLAGS) +GENLINK = $(COMPILER) $(PREPROCESS) $(DEPFLAGS) $(INCLUDE_FLAGS) STRIPLINK = sed -n '/^[^\#]/p' KERN_SIZE = wc -c kernel.bin | cut -d ' ' -f 1 KERN_INFO = sed "s/<KERNEL_SIZE>/$$($(KERN_SIZE))/" @@ -66,10 +74,10 @@ kernel.elf: $(KERNEL_OBJECTS) $(KERNEL_LD) $(GENELF) -T $(KERNEL_LD) $(KERNEL_OBJECTS) -o $@ init.bin: init.elf - $(CROSS_COMPILE)$(OBJCOPY) $(OBJCOPY_FLAGS) $< $@ + $(OBJCOPY) $(OBJCOPY_FLAGS) $< $@ kernel.bin: kernel.elf - $(CROSS_COMPILE)$(OBJCOPY) $(OBJCOPY_FLAGS) $< $@ + $(OBJCOPY) $(OBJCOPY_FLAGS) $< $@ apos.bin: init.bin kernel.bin cat init.bin kernel.bin > apos.bin |