Merge branch 'upstream/ticketlock-cleanup' of git://github.com/jsgf/linux-xen into...
[pandora-kernel.git] / arch / um / Makefile
1 #
2 # This file is included by the global makefile so that you can add your own
3 # architecture-specific flags and dependencies.
4 #
5 # Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 # Licensed under the GPL
7 #
8
9 ARCH_DIR := arch/um
10 OS := $(shell uname -s)
11 # We require bash because the vmlinux link and loader script cpp use bash
12 # features.
13 SHELL := /bin/bash
14
15 filechk_gen_header = $<
16
17 core-y                  += $(ARCH_DIR)/kernel/          \
18                            $(ARCH_DIR)/drivers/         \
19                            $(ARCH_DIR)/os-$(OS)/
20
21 MODE_INCLUDE    += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
22
23 include $(srctree)/$(ARCH_DIR)/Makefile-skas
24
25 SHARED_HEADERS  := $(ARCH_DIR)/include/shared
26 ARCH_INCLUDE    := -I$(srctree)/$(SHARED_HEADERS)
27 ARCH_INCLUDE    += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared
28 ifneq ($(KBUILD_SRC),)
29 ARCH_INCLUDE    += -I$(SHARED_HEADERS)
30 endif
31 KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)
32
33 # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
34 # named - it's a common symbol in libpcap, so we get a binary which crashes.
35 #
36 # Same things for in6addr_loopback and mktime - found in libc. For these two we
37 # only get link-time error, luckily.
38 #
39 # These apply to USER_CFLAGS to.
40
41 KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
42         $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap      \
43         -Din6addr_loopback=kernel_in6addr_loopback \
44         -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
45
46 KBUILD_AFLAGS += $(ARCH_INCLUDE)
47
48 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
49         $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
50         $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64
51
52 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
53
54 #This will adjust *FLAGS accordingly to the platform.
55 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
56
57 KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include
58
59 # -Derrno=kernel_errno - This turns all kernel references to errno into
60 # kernel_errno to separate them from the libc errno.  This allows -fno-common
61 # in KBUILD_CFLAGS.  Otherwise, it would cause ld to complain about the two different
62 # errnos.
63 # These apply to kernelspace only.
64 #
65 # strip leading and trailing whitespace to make the USER_CFLAGS removal of these
66 # defines more robust
67
68 KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
69                          -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
70 KBUILD_CFLAGS += $(KERNEL_DEFINES)
71
72 PHONY += linux
73
74 all: linux
75
76 linux: vmlinux
77         @echo '  LINK $@'
78         $(Q)ln -f $< $@
79
80 define archhelp
81   echo '* linux         - Binary kernel image (./linux) - for backward'
82   echo '                   compatibility only, this creates a hard link to the'
83   echo '                   real kernel binary, the "vmlinux" binary you'
84   echo '                   find in the kernel root.'
85 endef
86
87 KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH)
88
89 archprepare: $(SHARED_HEADERS)/user_constants.h
90 archprepare: $(SHARED_HEADERS)/kern_constants.h
91
92 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
93 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
94
95 CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
96         $(call cc-option, -fno-stack-protector,) \
97         $(call cc-option, -fno-stack-protector-all,)
98
99 # Options used by linker script
100 export LDS_START      := $(START)
101 export LDS_ELF_ARCH   := $(ELF_ARCH)
102 export LDS_ELF_FORMAT := $(ELF_FORMAT)
103
104 # The wrappers will select whether using "malloc" or the kernel allocator.
105 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
106
107 LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
108
109 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
110 define cmd_vmlinux__
111         $(CC) $(CFLAGS_vmlinux) -o $@ \
112         -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
113         -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
114         -lutil \
115         $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
116         FORCE ,$^) ; rm -f linux
117 endef
118
119 # When cleaning we don't include .config, so we don't include
120 # TT or skas makefiles and don't clean skas_ptregs.h.
121 CLEAN_FILES += linux x.i gmon.out \
122         $(SHARED_HEADERS)/user_constants.h \
123         $(SHARED_HEADERS)/kern_constants.h
124
125 archclean:
126         @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
127                 -o -name '*.gcov' \) -type f -print | xargs rm -f
128
129 # Generated files
130
131 $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
132         $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
133
134 define filechk_gen-asm-offsets
135         (set -e; \
136          echo "/*"; \
137          echo " * DO NOT MODIFY."; \
138          echo " *"; \
139          echo " * This file was generated by arch/$(ARCH)/Makefile"; \
140          echo " *"; \
141          echo " */"; \
142          echo ""; \
143          sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
144          echo ""; )
145 endef
146
147 $(SHARED_HEADERS)/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
148         $(call filechk,gen-asm-offsets)
149
150 $(SHARED_HEADERS)/kern_constants.h:
151         $(Q)mkdir -p $(dir $@)
152         $(Q)echo '#include "../../../../include/generated/asm-offsets.h"' >$@
153
154 export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH