blob: 95eba554baf9856f515d30150e66a5333ee04e18 [file] [log] [blame]
Al Viro5c48b102011-08-18 20:06:39 +01001core-y += arch/x86/crypto/
Linus Torvalds1da177e2005-04-16 15:20:36 -07002
Al Viro7bbe7202011-08-18 20:06:29 +01003ifeq ($(CONFIG_X86_32),y)
Jeff Dike42fda662007-10-16 01:26:50 -07004START := 0x8048000
Linus Torvalds1da177e2005-04-16 15:20:36 -07005
Paolo 'Blaisorblade' Giarrusso20d00212005-07-14 00:33:43 -07006LDFLAGS += -m elf_i386
Al Viroa6e77d62011-08-18 20:06:19 +01007ELF_ARCH := i386
8ELF_FORMAT := elf32-i386
Al Viroca5cd872007-10-29 04:31:16 +00009CHECKFLAGS += -D__i386__
Paolo 'Blaisorblade' Giarrusso20d00212005-07-14 00:33:43 -070010
Sam Ravnborga0f97e02007-10-14 22:21:35 +020011KBUILD_CFLAGS += $(call cc-option,-m32)
Sam Ravnborg222d3942007-10-15 21:59:31 +020012KBUILD_AFLAGS += $(call cc-option,-m32)
Paolo 'Blaisorblade' Giarrusso20d00212005-07-14 00:33:43 -070013LINK-y += $(call cc-option,-m32)
Paolo 'Blaisorblade' Giarrusso20d00212005-07-14 00:33:43 -070014
Al Viroa6e77d62011-08-18 20:06:19 +010015export LDFLAGS
Paolo 'Blaisorblade' Giarrusso20d00212005-07-14 00:33:43 -070016
Al Viro3cb42092012-04-09 13:59:00 -040017LDS_EXTRA := -Ui386
18export LDS_EXTRA
19
Paolo 'Blaisorblade' Giarrusso96d55b82005-10-30 15:00:07 -080020# First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y.
Al Viro7a78a172007-10-29 04:34:31 +000021include $(srctree)/arch/x86/Makefile_32.cpu
Paolo 'Blaisorblade' Giarrusso96d55b82005-10-30 15:00:07 -080022
23# prevent gcc from keeping the stack 16 byte aligned. Taken from i386.
24cflags-y += $(call cc-option,-mpreferred-stack-boundary=2)
25
Jeff Dikefec468b2006-06-04 02:51:49 -070026# Prevent sprintf in nfsd from being converted to strcpy and resulting in
27# an unresolved reference.
28cflags-y += -ffreestanding
29
Jeff Dike4f81c532008-07-07 13:36:56 -040030# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
31# a lot more stack due to the lack of sharing of stacklots. Also, gcc
32# 4.3.0 needs -funit-at-a-time for extern inline functions.
Masahiro Yamada665d92e2014-12-25 14:31:24 +090033KBUILD_CFLAGS += $(shell if [ $(cc-version) -lt 0400 ] ; then \
Jeff Dike4f81c532008-07-07 13:36:56 -040034 echo $(call cc-option,-fno-unit-at-a-time); \
35 else echo $(call cc-option,-funit-at-a-time); fi ;)
36
Sam Ravnborga0f97e02007-10-14 22:21:35 +020037KBUILD_CFLAGS += $(cflags-y)
Al Viro7bbe7202011-08-18 20:06:29 +010038
39else
40
41START := 0x60000000
42
43KBUILD_CFLAGS += -fno-builtin -m64
44
45CHECKFLAGS += -m64 -D__x86_64__
46KBUILD_AFLAGS += -m64
47LDFLAGS += -m elf_x86_64
48KBUILD_CPPFLAGS += -m64
49
50ELF_ARCH := i386:x86-64
51ELF_FORMAT := elf64-x86-64
52
53# Not on all 64-bit distros /lib is a symlink to /lib64. PLD is an example.
54
55LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64
56LINK-y += -m64
57
58# Do unit-at-a-time unconditionally on x86_64, following the host
59KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
60endif