# -*- makefile -*-
SHELL = /bin/sh
VPATH = $(SRCDIR)
# Binary utilities.
# If the host appears to be x86, use the normal tools.
# If it’s x86-64, use the compiler and linker in 32-bit mode.
# Otherwise assume cross-tools are installed as i386-elf-*.
X86 = i.86\|pentium.*\|[pk][56]\|nexgen\|viac3\|6×86\|athlon.*\|i86pc
X86_64 = x86_64
# Pintos doesn’t compile/run properly using gcc 4.3+. Force 4.1 for now.
CCPROG = /usr/class/cs140/x86_64/bin/i586-elf-gcc
ifeq ($(strip $(shell command -v $(CCPROG) 2> /dev/null)),)
CCPROG = gcc
endif
ifneq (0, $(shell expr `uname -m` : ‘$(X86)’))
CC = $(CCPROG)
LD = ld
OBJCOPY = objcopy
else
ifneq (0, $(shell expr `uname -m` : ‘$(X86_64)’))
CC = $(CCPROG) -m32
LD = ld -melf_i386
OBJCOPY = objcopy
else
CC = i386-elf-gcc
LD = i386-elf-ld
OBJCOPY = i386-elf-objcopy
endif
endif
ifeq ($(strip $(shell command -v $(CC) 2> /dev/null)),)
$(warning *** Compiler ($(CC)) not found. Did you set $$PATH properly? Please refer to the Getting Started section in the documentation for details. ***)
endif
# Compiler and assembler invocation.
DEFINES =
WARNINGS = -Wall -W -Wstrict-prototypes -Wmissing-prototypes -Wsystem-headers
CFLAGS = -g -msoft-float -O
CPPFLAGS = -nostdinc -I$(SRCDIR) -I$(SRCDIR)/lib
ASFLAGS = -Wa,–gstabs
LDFLAGS =
DEPS = -MMD -MF $(@:.o=.d)
# Turn off -fstack-protector, which we don’t support.
ifeq ($(strip $(shell echo | $(CC) -fno-stack-protector -E – > /dev/null 2>&1; echo $$?)),0)
CFLAGS += -fno-stack-protector
endif
# Turn off –build-id in the linker, which confuses the Pintos loader.
ifeq ($(strip $(shell $(LD) –help | grep -q build-id; echo $$?)),0)
LDFLAGS += -Wl,–build-id=none
endif
%.o: %.c
$(CC) -c $< -o $@ $(CFLAGS) $(CPPFLAGS) $(WARNINGS) $(DEFINES) $(DEPS)
%.o: %.S
$(CC) -c $< -o $@ $(ASFLAGS) $(CPPFLAGS) $(DEFINES) $(DEPS)