1 # Force i386-only instructions
7 CFLAGS += -fomit-frame-pointer
12 CFLAGS += -fstrength-reduce
15 # Code size reduction. gcc3 needs a different syntax to gcc2 if you
16 # want to avoid spurious warnings.
19 GCC_VERSION := $(subst ., ,$(shell $(CC) -dumpversion))
20 GCC_MAJOR := $(firstword $(GCC_VERSION))
22 CFLAGS += -malign-jumps=1 -malign-loops=1 -malign-functions=1
24 CFLAGS += -falign-jumps=1 -falign-loops=1 -falign-functions=1
28 # Code size reduction. This is almost always a win. The kernel uses
32 CFLAGS += -mpreferred-stack-boundary=2
35 # Code size reduction. Use regparm for all functions - C functions
36 # called from assembly (or vice versa) need __asmcall now
40 # Code size reduction. Use -mrtd (same __asmcall requirements as above)
45 # Code size reduction. This is the logical complement to -mregparm=3.
46 # It doesn't currently buy us anything, but if anything ever tries to
47 # return small structures, let's be prepared
49 CFLAGS += -freg-struct-return
51 # Force 32-bit code even on an x86-64 machine
55 ifeq ($(HOST_OS),FreeBSD)
56 LDFLAGS += -m elf_i386_fbsd
58 LDFLAGS += -m elf_i386
61 # EFI requires -fshort-wchar, and nothing else currently uses wchar_t
63 CFLAGS += -fshort-wchar
65 # We need to undefine the default macro "i386" when compiling .S
66 # files, otherwise ".arch i386" translates to ".arch 1"...
70 # Locations of utilities
72 ISOLINUX_BIN = /usr/lib/syslinux/isolinux.bin
74 # i386-specific directories containing source files
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
87 # The various xxx_loader.c files are #included into core/loader.c and
88 # should not be compiled directly.
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
94 # Include common x86 Makefile
96 MAKEDEPS += arch/x86/Makefile
97 include arch/x86/Makefile
99 # Include platform-specific Makefile
101 MAKEDEPS += arch/i386/Makefile.$(PLATFORM)
102 include arch/i386/Makefile.$(PLATFORM)
104 # Some suffixes (e.g. %.fd0) are generated directly from other
105 # finished files (e.g. %.dsk), rather than having their own prefix.
107 # rule to write disk images to /dev/fd0
108 NON_AUTO_MEDIA += fd0
110 $(QM)$(ECHO) " [DD] $@"
111 $(Q)dd if=$< bs=512 conv=sync of=/dev/fd0
114 # Add NON_AUTO_MEDIA to the media list, so that they show up in the
117 MEDIA += $(NON_AUTO_MEDIA)