xref: /openbmc/linux/tools/objtool/Makefile (revision b58c6630) 
1# SPDX-License-Identifier: GPL-2.0
2include ../scripts/Makefile.include
3include ../scripts/Makefile.arch
4
5# always use the host compiler
6ifneq ($(LLVM),)
7HOSTAR	?= llvm-ar
8HOSTCC	?= clang
9HOSTLD	?= ld.lld
10else
11HOSTAR	?= ar
12HOSTCC	?= gcc
13HOSTLD	?= ld
14endif
15AR	 = $(HOSTAR)
16CC	 = $(HOSTCC)
17LD	 = $(HOSTLD)
18
19ifeq ($(srctree),)
20srctree := $(patsubst %/,%,$(dir $(CURDIR)))
21srctree := $(patsubst %/,%,$(dir $(srctree)))
22endif
23
24SUBCMD_SRCDIR		= $(srctree)/tools/lib/subcmd/
25LIBSUBCMD_OUTPUT	= $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
26LIBSUBCMD		= $(LIBSUBCMD_OUTPUT)libsubcmd.a
27
28OBJTOOL    := $(OUTPUT)objtool
29OBJTOOL_IN := $(OBJTOOL)-in.o
30
31LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
32LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
33
34all: $(OBJTOOL)
35
36INCLUDES := -I$(srctree)/tools/include \
37	    -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
38	    -I$(srctree)/tools/arch/$(SRCARCH)/include
39WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
40CFLAGS   := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
41LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
42
43# Allow old libelf to be used:
44elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
45CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
46
47AWK = awk
48export srctree OUTPUT CFLAGS SRCARCH AWK
49include $(srctree)/tools/build/Makefile.include
50
51$(OBJTOOL_IN): fixdep FORCE
52	@$(MAKE) $(build)=objtool
53
54$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
55	@$(CONFIG_SHELL) ./sync-check.sh
56	$(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
57
58
59$(LIBSUBCMD): fixdep FORCE
60	$(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
61
62clean:
63	$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
64	$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
65	$(Q)$(RM) $(OUTPUT)arch/x86/inat-tables.c $(OUTPUT)fixdep
66
67FORCE:
68
69.PHONY: clean FORCE
70