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authorRolf Eike Beer <eb@emlix.com>2019-03-26 12:48:39 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-10-05 12:47:32 +0200
commit21b50a160d8f01571e8fb5cd9c8e390fc673ebc5 (patch)
treee43b47aff49aec826239d8793142e929a800ad18 /tools
parentea96b519b82a4fc29bf286768721027713336c83 (diff)
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objtool: Query pkg-config for libelf location
commit 056d28d135bca0b1d0908990338e00e9dadaf057 upstream. If it is not in the default location, compilation fails at several points. Signed-off-by: Rolf Eike Beer <eb@emlix.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/91a25e992566a7968fedc89ec80e7f4c83ad0548.1553622500.git.jpoimboe@redhat.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/objtool/Makefile7
1 files changed, 5 insertions, 2 deletions
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index 884d4f1ed0c1..85d3d041e083 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -26,14 +26,17 @@ LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a
OBJTOOL := $(OUTPUT)objtool
OBJTOOL_IN := $(OBJTOOL)-in.o
+LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
+LIBELF_LIBS := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
+
all: $(OBJTOOL)
INCLUDES := -I$(srctree)/tools/include \
-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
-I$(srctree)/tools/objtool/arch/$(ARCH)/include
WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
-CFLAGS += -Wall -Werror $(WARNINGS) -fomit-frame-pointer -O2 -g $(INCLUDES)
-LDFLAGS += -lelf $(LIBSUBCMD)
+CFLAGS += -Wall -Werror $(WARNINGS) -fomit-frame-pointer -O2 -g $(INCLUDES) $(LIBELF_FLAGS)
+LDFLAGS += $(LIBELF_LIBS) $(LIBSUBCMD)
# Allow old libelf to be used:
elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)