Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0
2include ../scripts/Makefile.include
3include ../scripts/Makefile.arch
4
5ifeq ($(SRCARCH),x86)
6 BUILD_ORC := y
7 ARCH_HAS_KLP := y
8endif
9
10ifeq ($(SRCARCH),loongarch)
11 BUILD_ORC := y
12endif
13
14ifeq ($(ARCH_HAS_KLP),y)
15 HAVE_XXHASH = $(shell printf "$(pound)include <xxhash.h>\nXXH3_state_t *state;int main() {}" | \
16 $(HOSTCC) -xc - -o /dev/null -lxxhash 2> /dev/null && echo y || echo n)
17 ifeq ($(HAVE_XXHASH),y)
18 BUILD_KLP := y
19 LIBXXHASH_CFLAGS := $(shell $(HOSTPKG_CONFIG) libxxhash --cflags 2>/dev/null) \
20 -DBUILD_KLP
21 LIBXXHASH_LIBS := $(shell $(HOSTPKG_CONFIG) libxxhash --libs 2>/dev/null || echo -lxxhash)
22 endif
23endif
24
25export BUILD_ORC BUILD_KLP
26
27ifeq ($(srctree),)
28srctree := $(patsubst %/,%,$(dir $(CURDIR)))
29srctree := $(patsubst %/,%,$(dir $(srctree)))
30endif
31
32LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/
33ifneq ($(OUTPUT),)
34 LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd
35else
36 LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd
37endif
38LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
39
40OBJTOOL := $(OUTPUT)objtool
41OBJTOOL_IN := $(OBJTOOL)-in.o
42
43LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
44LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
45
46all: $(OBJTOOL)
47
48WARNINGS := -Werror -Wall -Wextra -Wmissing-prototypes \
49 -Wmissing-declarations -Wwrite-strings \
50 -Wno-implicit-fallthrough -Wno-sign-compare \
51 -Wno-unused-parameter
52
53INCLUDES := -I$(srctree)/tools/include \
54 -I$(srctree)/tools/include/uapi \
55 -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
56 -I$(srctree)/tools/arch/$(SRCARCH)/include \
57 -I$(srctree)/tools/objtool/include \
58 -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \
59 -I$(LIBSUBCMD_OUTPUT)/include
60
61OBJTOOL_CFLAGS := -std=gnu11 -fomit-frame-pointer -O2 -g $(WARNINGS) \
62 $(INCLUDES) $(LIBELF_FLAGS) $(LIBXXHASH_CFLAGS) $(HOSTCFLAGS)
63
64OBJTOOL_LDFLAGS := $(LIBSUBCMD) $(LIBELF_LIBS) $(LIBXXHASH_LIBS) $(HOSTLDFLAGS)
65
66# Allow old libelf to be used:
67elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - 2>/dev/null | grep elf_getshdr)
68OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
69
70# Always want host compilation.
71HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
72
73#
74# To support disassembly, objtool needs libopcodes which is provided
75# with libbfd (binutils-dev or binutils-devel package).
76#
77# We check using HOSTCC directly rather than the shared feature framework
78# because objtool is a host tool that links against host libraries.
79#
80HAVE_LIBOPCODES := $(shell echo 'int main(void) { return 0; }' | \
81 $(HOSTCC) -xc - -o /dev/null -lopcodes 2>/dev/null && echo y)
82
83# Styled disassembler support requires binutils >= 2.39
84HAVE_DISASM_STYLED := $(shell echo '$(pound)include <dis-asm.h>' | \
85 $(HOSTCC) -E -xc - 2>/dev/null | grep -q disassembler_style && echo y)
86
87BUILD_DISAS := n
88
89ifeq ($(HAVE_LIBOPCODES),y)
90 BUILD_DISAS := y
91 OBJTOOL_CFLAGS += -DDISAS -DPACKAGE='"objtool"'
92 OBJTOOL_LDFLAGS += -lopcodes
93ifeq ($(HAVE_DISASM_STYLED),y)
94 OBJTOOL_CFLAGS += -DDISASM_INIT_STYLED
95endif
96endif
97
98export BUILD_DISAS
99
100AWK = awk
101MKDIR = mkdir
102
103export srctree OUTPUT CFLAGS SRCARCH AWK
104include $(srctree)/tools/build/Makefile.include
105
106$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE
107 $(Q)$(CONFIG_SHELL) ./sync-check.sh
108 $(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \
109 LDFLAGS="$(OBJTOOL_LDFLAGS)"
110
111
112$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
113 $(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@
114
115
116$(LIBSUBCMD_OUTPUT):
117 $(Q)$(MKDIR) -p $@
118
119$(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
120 $(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
121 DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
122 $(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \
123 $@ install_headers
124
125$(LIBSUBCMD)-clean:
126 $(call QUIET_CLEAN, libsubcmd)
127 $(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT)
128
129clean: $(LIBSUBCMD)-clean
130 $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
131 $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
132 $(Q)$(RM) $(OUTPUT)arch/x86/lib/cpu-feature-names.c $(OUTPUT)fixdep
133 $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
134 $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.objtool
135 $(Q)$(RM) -r -- $(OUTPUT)feature
136
137FORCE:
138
139.PHONY: clean FORCE