mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Ian Rogers](/assets/img/avatar_default.png)
HOSTCC is always wanted when building objtool. Setting CC to HOSTCC happens after tools/scripts/Makefile.include is included, meaning flags (like CFLAGS) are set assuming say CC is gcc, but then it can be later set to HOSTCC which may be clang. tools/scripts/Makefile.include is needed for host set up and common macros in objtool's Makefile. Rather than override the CC variable to HOSTCC, just pass CC as HOSTCC to the sub-makes of Makefile.build, the libsubcmd builds and also to the linkage step. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20230126190606.40739-4-irogers@google.com Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
94 lines
2.7 KiB
Makefile
94 lines
2.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
include ../scripts/Makefile.include
|
|
include ../scripts/Makefile.arch
|
|
|
|
ifeq ($(srctree),)
|
|
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
|
|
srctree := $(patsubst %/,%,$(dir $(srctree)))
|
|
endif
|
|
|
|
LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/
|
|
ifneq ($(OUTPUT),)
|
|
LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd
|
|
else
|
|
LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd
|
|
endif
|
|
LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
|
|
|
|
OBJTOOL := $(OUTPUT)objtool
|
|
OBJTOOL_IN := $(OBJTOOL)-in.o
|
|
|
|
LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
|
|
LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
|
|
|
|
all: $(OBJTOOL)
|
|
|
|
INCLUDES := -I$(srctree)/tools/include \
|
|
-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
|
|
-I$(srctree)/tools/arch/$(SRCARCH)/include \
|
|
-I$(srctree)/tools/objtool/include \
|
|
-I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \
|
|
-I$(LIBSUBCMD_OUTPUT)/include
|
|
# Note, EXTRA_WARNINGS here was determined for CC and not HOSTCC, it
|
|
# is passed here to match a legacy behavior.
|
|
WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs
|
|
OBJTOOL_CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
|
|
OBJTOOL_LDFLAGS := $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
|
|
|
|
# Allow old libelf to be used:
|
|
elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - | grep elf_getshdr)
|
|
OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
|
|
|
|
# Always want host compilation.
|
|
HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
|
|
|
|
AWK = awk
|
|
MKDIR = mkdir
|
|
|
|
ifeq ($(V),1)
|
|
Q =
|
|
else
|
|
Q = @
|
|
endif
|
|
|
|
BUILD_ORC := n
|
|
|
|
ifeq ($(SRCARCH),x86)
|
|
BUILD_ORC := y
|
|
endif
|
|
|
|
export BUILD_ORC
|
|
export srctree OUTPUT CFLAGS SRCARCH AWK
|
|
include $(srctree)/tools/build/Makefile.include
|
|
|
|
$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE
|
|
$(Q)$(CONFIG_SHELL) ./sync-check.sh
|
|
$(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \
|
|
LDFLAGS="$(OBJTOOL_LDFLAGS)"
|
|
|
|
|
|
$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
|
|
$(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@
|
|
|
|
|
|
$(LIBSUBCMD_OUTPUT):
|
|
$(Q)$(MKDIR) -p $@
|
|
|
|
$(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
|
|
$(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
|
|
DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
|
|
$(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \
|
|
$@ install_headers
|
|
|
|
$(LIBSUBCMD)-clean:
|
|
$(call QUIET_CLEAN, libsubcmd)
|
|
$(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT)
|
|
|
|
clean: $(LIBSUBCMD)-clean
|
|
$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
|
|
$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
|
|
$(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
|
|
|
|
FORCE:
|
|
|
|
.PHONY: clean FORCE
|