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Commit dd399ac9 authored by Luca Boccassi's avatar Luca Boccassi Committed by Daniel Borkmann
Browse files

tools/bpf: generate pkg-config file for libbpf 



Generate a libbpf.pc file at build time so that users can rely
on pkg-config to find the library, its CFLAGS and LDFLAGS.

Signed-off-by: default avatarLuca Boccassi <bluca@debian.org>
Acked-by: default avatarAndrey Ignatov <rdna@fb.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 356d71e0

tools/lib/bpf/.gitignore

+1 −0
Original line number Diff line number Diff line 
libbpf_version.h

libbpf.pc

FEATURE-DUMP.libbpf

test_libbpf

tools/lib/bpf/Makefile

+15 −3
Original line number Diff line number Diff line
@@ -90,6 +90,7 @@ LIBBPF_VERSION = $(BPF_VERSION).$(BPF_PATCHLEVEL).$(BPF_EXTRAVERSION) 


LIB_TARGET	= libbpf.a libbpf.so.$(LIBBPF_VERSION)

LIB_FILE	= libbpf.a libbpf.so*

PC_FILE		= libbpf.pc



# Set compile option CFLAGS

ifdef EXTRA_CFLAGS
@@ -134,13 +135,14 @@ VERSION_SCRIPT := libbpf.map 


LIB_TARGET	:= $(addprefix $(OUTPUT),$(LIB_TARGET))

LIB_FILE	:= $(addprefix $(OUTPUT),$(LIB_FILE))

PC_FILE		:= $(addprefix $(OUTPUT),$(PC_FILE))



GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN) | \

			   awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {s++} END{print s}')

VERSIONED_SYM_COUNT = $(shell readelf -s --wide $(OUTPUT)libbpf.so | \

			      grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l)



CMD_TARGETS = $(LIB_TARGET)

CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)



CXX_TEST_TARGET = $(OUTPUT)test_libbpf
@@ -187,6 +189,12 @@ $(OUTPUT)libbpf.a: $(BPF_IN) 
$(OUTPUT)test_libbpf: test_libbpf.cpp $(OUTPUT)libbpf.a

	$(QUIET_LINK)$(CXX) $(INCLUDES) $^ -lelf -o $@



$(OUTPUT)libbpf.pc:

	$(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \

		-e "s|@LIBDIR@|$(libdir_SQ)|" \

		-e "s|@VERSION@|$(LIBBPF_VERSION)|" \

		< libbpf.pc.template > $@



check: check_abi



check_abi: $(OUTPUT)libbpf.so
@@ -223,7 +231,11 @@ install_headers: 
		$(call do_install,libbpf.h,$(prefix)/include/bpf,644);

		$(call do_install,btf.h,$(prefix)/include/bpf,644);



install: install_lib

install_pkgconfig: $(PC_FILE)

	$(call QUIET_INSTALL, $(PC_FILE)) \

		$(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644)



install: install_lib install_pkgconfig



### Cleaning rules
@@ -233,7 +245,7 @@ config-clean: 


clean:

	$(call QUIET_CLEAN, libbpf) $(RM) $(TARGETS) $(CXX_TEST_TARGET) \

		*.o *~ *.a *.so *.so.$(VERSION) .*.d .*.cmd LIBBPF-CFLAGS

		*.o *~ *.a *.so *.so.$(VERSION) .*.d .*.cmd *.pc LIBBPF-CFLAGS

	$(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf

tools/lib/bpf/libbpf.pc.template

0 → 100644
+12 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)



prefix=@PREFIX@

libdir=@LIBDIR@

includedir=${prefix}/include



Name: libbpf

Description: BPF library

Version: @VERSION@

Libs: -L${libdir} -lbpf

Requires.private: libelf

Cflags: -I${includedir}