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
5# always use the host compiler
6HOSTAR ?= ar
7HOSTCC ?= gcc
8HOSTLD ?= ld
9AR = $(HOSTAR)
10CC = $(HOSTCC)
11LD = $(HOSTLD)
12
13ifeq ($(srctree),)
14srctree := $(patsubst %/,%,$(dir $(CURDIR)))
15srctree := $(patsubst %/,%,$(dir $(srctree)))
16endif
17
18SUBCMD_SRCDIR = $(srctree)/tools/lib/subcmd/
19LIBSUBCMD_OUTPUT = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
20LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a
21
22OBJTOOL := $(OUTPUT)objtool
23OBJTOOL_IN := $(OBJTOOL)-in.o
24
25LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
26LIBELF_LIBS := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
27
28all: $(OBJTOOL)
29
30INCLUDES := -I$(srctree)/tools/include \
31 -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
32 -I$(srctree)/tools/arch/$(SRCARCH)/include
33WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
34CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
35LDFLAGS += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
36
37# Allow old libelf to be used:
38elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
39CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
40
41AWK = awk
42export srctree OUTPUT CFLAGS SRCARCH AWK
43include $(srctree)/tools/build/Makefile.include
44
45$(OBJTOOL_IN): fixdep FORCE
46 @$(MAKE) $(build)=objtool
47
48$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
49 @$(CONFIG_SHELL) ./sync-check.sh
50 $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
51
52
53$(LIBSUBCMD): fixdep FORCE
54 $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
55
56clean:
57 $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
58 $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
59 $(Q)$(RM) $(OUTPUT)arch/x86/inat-tables.c $(OUTPUT)fixdep
60
61FORCE:
62
63.PHONY: clean FORCE