mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
bf71940fc1
The check for using old libelf prints an error message when libelf.h is not available but does not abort. This may confuse so hide the compiler error message. Signed-off-by: David Engraf <david.engraf@sysgo.com> Link: https://lore.kernel.org/r/20250203073610.206000-1-david.engraf@sysgo.com Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
93 lines
2.8 KiB
Makefile
93 lines
2.8 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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include ../scripts/Makefile.include
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include ../scripts/Makefile.arch
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ifeq ($(srctree),)
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srctree := $(patsubst %/,%,$(dir $(CURDIR)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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endif
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LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/
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ifneq ($(OUTPUT),)
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LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd
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else
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LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd
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endif
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LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
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OBJTOOL := $(OUTPUT)objtool
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OBJTOOL_IN := $(OBJTOOL)-in.o
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LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
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LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
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all: $(OBJTOOL)
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INCLUDES := -I$(srctree)/tools/include \
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-I$(srctree)/tools/include/uapi \
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-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
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-I$(srctree)/tools/arch/$(SRCARCH)/include \
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-I$(srctree)/tools/objtool/include \
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-I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \
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-I$(LIBSUBCMD_OUTPUT)/include
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# Note, EXTRA_WARNINGS here was determined for CC and not HOSTCC, it
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# is passed here to match a legacy behavior.
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WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs
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OBJTOOL_CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
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OBJTOOL_LDFLAGS := $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
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# Allow old libelf to be used:
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elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - 2>/dev/null | grep elf_getshdr)
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OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
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# Always want host compilation.
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HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
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AWK = awk
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MKDIR = mkdir
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BUILD_ORC := n
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ifeq ($(SRCARCH),x86)
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BUILD_ORC := y
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endif
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ifeq ($(SRCARCH),loongarch)
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BUILD_ORC := y
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endif
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export BUILD_ORC
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export srctree OUTPUT CFLAGS SRCARCH AWK
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include $(srctree)/tools/build/Makefile.include
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$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE
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$(Q)$(CONFIG_SHELL) ./sync-check.sh
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$(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \
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LDFLAGS="$(OBJTOOL_LDFLAGS)"
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$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
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$(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@
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$(LIBSUBCMD_OUTPUT):
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$(Q)$(MKDIR) -p $@
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$(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
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$(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
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DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
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$(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \
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$@ install_headers
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$(LIBSUBCMD)-clean:
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$(call QUIET_CLEAN, libsubcmd)
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$(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT)
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clean: $(LIBSUBCMD)-clean
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$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
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$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
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$(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
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FORCE:
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.PHONY: clean FORCE
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