1# Force i386-only instructions 2# 3CFLAGS += -march=i386 4 5# Code size reduction. 6# 7CFLAGS += -fomit-frame-pointer 8 9# Code size reduction. 10# 11ifeq ($(CCTYPE),gcc) 12CFLAGS += -fstrength-reduce 13endif 14 15# Code size reduction. gcc3 needs a different syntax to gcc2 if you 16# want to avoid spurious warnings. 17# 18ifeq ($(CCTYPE),gcc) 19GCC_VERSION := $(subst ., ,$(shell $(CC) -dumpversion)) 20GCC_MAJOR := $(firstword $(GCC_VERSION)) 21ifeq ($(GCC_MAJOR),2) 22CFLAGS += -malign-jumps=1 -malign-loops=1 -malign-functions=1 23else 24CFLAGS += -falign-jumps=1 -falign-loops=1 -falign-functions=1 25endif # gcc2 26endif # gcc 27 28# Code size reduction. This is almost always a win. The kernel uses 29# it, too. 30# 31ifeq ($(CCTYPE),gcc) 32CFLAGS += -mpreferred-stack-boundary=2 33endif 34 35# Code size reduction. Use regparm for all functions - C functions 36# called from assembly (or vice versa) need __asmcall now 37# 38CFLAGS += -mregparm=3 39 40# Code size reduction. Use -mrtd (same __asmcall requirements as above) 41ifeq ($(CCTYPE),gcc) 42CFLAGS += -mrtd 43endif 44 45# Code size reduction. This is the logical complement to -mregparm=3. 46# It doesn't currently buy us anything, but if anything ever tries to 47# return small structures, let's be prepared 48# 49CFLAGS += -freg-struct-return 50 51# Force 32-bit code even on an x86-64 machine 52# 53CFLAGS += -m32 54ASFLAGS += --32 55ifeq ($(HOST_OS),FreeBSD) 56LDFLAGS += -m elf_i386_fbsd 57else 58LDFLAGS += -m elf_i386 59endif 60 61# EFI requires -fshort-wchar, and nothing else currently uses wchar_t 62# 63CFLAGS += -fshort-wchar 64 65# We need to undefine the default macro "i386" when compiling .S 66# files, otherwise ".arch i386" translates to ".arch 1"... 67# 68CFLAGS += -Ui386 69 70# Locations of utilities 71# 72ISOLINUX_BIN = /usr/lib/syslinux/isolinux.bin 73 74# i386-specific directories containing source files 75# 76SRCDIRS += arch/i386/core arch/i386/transitions arch/i386/prefix 77SRCDIRS += arch/i386/firmware/pcbios 78SRCDIRS += arch/i386/image 79SRCDIRS += arch/i386/drivers 80SRCDIRS += arch/i386/drivers/net 81SRCDIRS += arch/i386/interface/pcbios 82SRCDIRS += arch/i386/interface/pxe 83SRCDIRS += arch/i386/interface/pxeparent 84SRCDIRS += arch/i386/interface/syslinux 85SRCDIRS += arch/i386/hci/commands 86 87# The various xxx_loader.c files are #included into core/loader.c and 88# should not be compiled directly. 89# 90NON_AUTO_SRCS += arch/i386/core/aout_loader.c 91NON_AUTO_SRCS += arch/i386/core/freebsd_loader.c 92NON_AUTO_SRCS += arch/i386/core/wince_loader.c 93 94# Include common x86 Makefile 95# 96MAKEDEPS += arch/x86/Makefile 97include arch/x86/Makefile 98 99# Include platform-specific Makefile 100# 101MAKEDEPS += arch/i386/Makefile.$(PLATFORM) 102include arch/i386/Makefile.$(PLATFORM) 103 104# Some suffixes (e.g. %.fd0) are generated directly from other 105# finished files (e.g. %.dsk), rather than having their own prefix. 106 107# rule to write disk images to /dev/fd0 108NON_AUTO_MEDIA += fd0 109%fd0 : %dsk 110 $(QM)$(ECHO) " [DD] $@" 111 $(Q)dd if=$< bs=512 conv=sync of=/dev/fd0 112 $(Q)sync 113 114# Add NON_AUTO_MEDIA to the media list, so that they show up in the 115# output of "make" 116# 117MEDIA += $(NON_AUTO_MEDIA) 118