1 #
2 # This file is included by the global makefile
3 # architecture-specific flags and dependencies
4 #
5 # Copyright (C) 2002 - 2007 Jeff Dike (jdike@{
6 # Licensed under the GPL
7 #
8
9 # select defconfig based on actual architectur
10 ifeq ($(SUBARCH),x86)
11 ifeq ($(shell uname -m),x86_64)
12 KBUILD_DEFCONFIG := x86_64_defconfig
13 else
14 KBUILD_DEFCONFIG := i386_defconfig
15 endif
16 else
17 KBUILD_DEFCONFIG := $(SUBARCH)_defconf
18 endif
19
20 ARCH_DIR := arch/um
21 # We require bash because the vmlinux link and
22 # features.
23 SHELL := bash
24
25 MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/in
26
27 HEADER_ARCH := $(SUBARCH)
28
29 ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
30 HEADER_ARCH := x86
31 endif
32
33 ifdef CONFIG_64BIT
34 KBUILD_CFLAGS += -mcmodel=large
35 endif
36
37 HOST_DIR := arch/$(HEADER_ARCH)
38
39 include $(srctree)/$(ARCH_DIR)/Makefile-skas
40 include $(srctree)/$(HOST_DIR)/Makefile.um
41
42 core-y += $(HOST_DIR)/um/
43
44 SHARED_HEADERS := $(ARCH_DIR)/include/shared
45 ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADE
46 ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um
47 KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
48
49 # -Dvmap=kernel_vmap prevents anything from re
50 # named - it's a common symbol in libpcap, so
51 #
52 # Same things for in6addr_loopback and mktime
53 # only get link-time error, luckily.
54 #
55 # -Dlongjmp=kernel_longjmp prevents anything f
56 # embedded copy of longjmp, same thing for set
57 #
58 # These apply to USER_CFLAGS to.
59
60 KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arc
61 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap
62 -Dlongjmp=kernel_longjmp -Dsetjmp=kern
63 -Din6addr_loopback=kernel_in6addr_loop
64 -Din6addr_any=kernel_in6addr_any -Dstr
65
66 KBUILD_RUSTFLAGS += -Crelocation-model=pie
67
68 KBUILD_AFLAGS += $(ARCH_INCLUDE)
69
70 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(
71 $(ARCH_INCLUDE) $(MODE_INCLUDE
72 -D_FILE_OFFSET_BITS=64 -idiraf
73 -idirafter $(objtree)/include
74
75 #This will adjust *FLAGS accordingly to the pl
76 include $(srctree)/$(ARCH_DIR)/Makefile-os-Lin
77
78 KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/in
79 -I$(srctree)/$(HOST_DIR)/in
80 -I$(objtree)/$(HOST_DIR)/in
81 -I$(objtree)/$(HOST_DIR)/in
82
83 # -Derrno=kernel_errno - This turns all kernel
84 # kernel_errno to separate them from the libc
85 # in KBUILD_CFLAGS. Otherwise, it would cause
86 # errnos.
87 # These apply to kernelspace only.
88 #
89 # strip leading and trailing whitespace to mak
90 # defines more robust
91
92 KERNEL_DEFINES = $(strip -Derrno=kernel_errno
93 -Dmktime=kernel_mktim
94 KBUILD_CFLAGS += $(KERNEL_DEFINES)
95
96 PHONY += linux
97
98 all: linux
99
100 linux: vmlinux
101 @echo ' LINK $@'
102 $(Q)ln -f $< $@
103
104 define archhelp
105 echo '* linux - Binary kernel image
106 echo ' compatibility only,
107 echo ' real kernel binary,
108 echo ' find in the kernel
109 endef
110
111 archheaders:
112 $(Q)$(MAKE) -f $(srctree)/Makefile ARC
113
114 archprepare:
115 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um in
116
117 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
118 ifdef CONFIG_LD_SCRIPT_DYN
119 LINK-$(call gcc-min-version, 60100)$(CONFIG_CC
120 endif
121 LINK-$(CONFIG_LD_SCRIPT_DYN_RPATH) += -Wl,-rpa
122
123 CFLAGS_NO_HARDENING := $(call cc-option, -fno-
124 -fno-stack-protector $(call cc-option,
125
126 # Options used by linker script
127 export LDS_START := $(START)
128 export LDS_ELF_ARCH := $(ELF_ARCH)
129 export LDS_ELF_FORMAT := $(ELF_FORMAT)
130
131 # The wrappers will select whether using "mall
132 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free
133
134 # Avoid binutils 2.39+ warnings by marking the
135 # ignorning warnings for the kallsyms sections
136 LDFLAGS_EXECSTACK = -z noexecstack
137 ifeq ($(CONFIG_LD_IS_BFD),y)
138 LDFLAGS_EXECSTACK += $(call ld-option,--no-war
139 endif
140
141 LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFL
142
143 # Used by link-vmlinux.sh which has special su
144 export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAP
145
146 # When cleaning we don't include .config, so w
147 # TT or skas makefiles and don't clean skas_pt
148 CLEAN_FILES += linux x.i gmon.out
149 MRPROPER_FILES += $(HOST_DIR)/include/generate
150
151 archclean:
152 @find . \( -name '*.bb' -o -name '*.bb
153 -o -name '*.gcov' \) -type f -
154
155 export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_
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