1 # Force i386-only instructions 2 # 3 CFLAGS += -march=i386 4 5 # Code size reduction. 6 # 7 CFLAGS += -fomit-frame-pointer 8 9 # Code size reduction. 10 # 11 ifeq ($(CCTYPE),gcc) 12 CFLAGS += -fstrength-reduce 13 endif 14 15 # Code size reduction. gcc3 needs a different syntax to gcc2 if you 16 # want to avoid spurious warnings. 17 # 18 ifeq ($(CCTYPE),gcc) 19 GCC_VERSION := $(subst ., ,$(shell $(CC) -dumpversion)) 20 GCC_MAJOR := $(firstword $(GCC_VERSION)) 21 ifeq ($(GCC_MAJOR),2) 22 CFLAGS += -malign-jumps=1 -malign-loops=1 -malign-functions=1 23 else 24 CFLAGS += -falign-jumps=1 -falign-loops=1 -falign-functions=1 25 endif # gcc2 26 endif # gcc 27 28 # Code size reduction. This is almost always a win. The kernel uses 29 # it, too. 30 # 31 ifeq ($(CCTYPE),gcc) 32 CFLAGS += -mpreferred-stack-boundary=2 33 endif 34 35 # Code size reduction. Use regparm for all functions - C functions 36 # called from assembly (or vice versa) need __asmcall now 37 # 38 CFLAGS += -mregparm=3 39 40 # Code size reduction. Use -mrtd (same __asmcall requirements as above) 41 ifeq ($(CCTYPE),gcc) 42 CFLAGS += -mrtd 43 endif 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 # 49 CFLAGS += -freg-struct-return 50 51 # Force 32-bit code even on an x86-64 machine 52 # 53 CFLAGS += -m32 54 ASFLAGS += --32 55 ifeq ($(HOST_OS),FreeBSD) 56 LDFLAGS += -m elf_i386_fbsd 57 else 58 LDFLAGS += -m elf_i386 59 endif 60 61 # EFI requires -fshort-wchar, and nothing else currently uses wchar_t 62 # 63 CFLAGS += -fshort-wchar 64 65 # We need to undefine the default macro "i386" when compiling .S 66 # files, otherwise ".arch i386" translates to ".arch 1"... 67 # 68 CFLAGS += -Ui386 69 70 # Locations of utilities 71 # 72 ISOLINUX_BIN = /usr/lib/syslinux/isolinux.bin 73 74 # i386-specific directories containing source files 75 # 76 SRCDIRS += arch/i386/core arch/i386/transitions arch/i386/prefix 77 SRCDIRS += arch/i386/firmware/pcbios 78 SRCDIRS += arch/i386/image 79 SRCDIRS += arch/i386/drivers 80 SRCDIRS += arch/i386/drivers/net 81 SRCDIRS += arch/i386/interface/pcbios 82 SRCDIRS += arch/i386/interface/pxe 83 SRCDIRS += arch/i386/interface/pxeparent 84 SRCDIRS += arch/i386/interface/syslinux 85 SRCDIRS += arch/i386/hci/commands 86 87 # The various xxx_loader.c files are #included into core/loader.c and 88 # should not be compiled directly. 89 # 90 NON_AUTO_SRCS += arch/i386/core/aout_loader.c 91 NON_AUTO_SRCS += arch/i386/core/freebsd_loader.c 92 NON_AUTO_SRCS += arch/i386/core/wince_loader.c 93 94 # Include common x86 Makefile 95 # 96 MAKEDEPS += arch/x86/Makefile 97 include arch/x86/Makefile 98 99 # Include platform-specific Makefile 100 # 101 MAKEDEPS += arch/i386/Makefile.$(PLATFORM) 102 include 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 108 NON_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 # 117 MEDIA += $(NON_AUTO_MEDIA) 118
