libbpf: initial package

packages/devel/libbpf/package.mk

@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2021-present Team LibreELEC (https://libreelec.tv)
+
+PKG_NAME="libbpf"
+PKG_VERSION="0.5.0"
+PKG_SHA256="d5b27980ceab9a80b6f28d3e67b51cea526fda49bd13151ba966e33548feb4f4"
+PKG_LICENSE="LGPL-2.1"
+PKG_SITE="https://github.com/libbpf/libbpf"
+PKG_URL="https://github.com/libbpf/libbpf/archive/refs/tags/v${PKG_VERSION}.tar.gz"
+PKG_DEPENDS_TARGET="toolchain elfutils"
+PKG_LONGDESC="libbpf supports building BPF CO-RE-enabled applications"
+PKG_TOOLCHAIN="make"
+
+make_target() {
+  make BUILD_STATIC_ONLY=1 \
+       PREFIX=${SYSROOT_PREFIX}/usr \
+       -C src
+}
+
+makeinstall_target() {
+  make BUILD_STATIC_ONLY=1 \
+       PREFIX=${SYSROOT_PREFIX}/usr \
+       -C src install
+}

packages/devel/libbpf/patches/libbpf-fix-crosscompile-and-sysroot.patch

@@ -0,0 +1,39 @@
+--- a/src/Makefile	2021-09-09 09:01:51.000000000 +1000
++++ b/src/Makefile	2021-10-17 17:49:02.868557327 +1100
+@@ -61,15 +61,12 @@
+ 
+ DESTDIR ?=
+ 
+-ifeq ($(filter-out %64 %64be %64eb %64le %64el s390x, $(shell uname -m)),)
+-	LIBSUBDIR := lib64
+-else
+-	LIBSUBDIR := lib
+-endif
++LIBSUBDIR := lib
+ 
+ # By default let the pc file itself use ${prefix} in includedir/libdir so that
+ # the prefix can be overridden at runtime (eg: --define-prefix)
+ ifndef LIBDIR
++	PREFIX_PC := /usr
+ 	LIBDIR_PC := $$\{prefix\}/$(LIBSUBDIR)
+ else
+ 	LIBDIR_PC := $(LIBDIR)
+@@ -100,7 +97,7 @@
+ 		  $^ $(ALL_LDFLAGS) -o $@
+ 
+ $(OBJDIR)/libbpf.pc:
+-	$(Q)sed -e "s|@PREFIX@|$(PREFIX)|" \
++	$(Q)sed -e "s|@PREFIX@|$(PREFIX_PC)|" \
+ 		-e "s|@LIBDIR@|$(LIBDIR_PC)|" \
+ 		-e "s|@VERSION@|$(LIBBPF_VERSION)|" \
+ 		< libbpf.pc.template > $@
+--- a/src/libbpf.pc.template	2021-09-09 09:01:51.000000000 +1000
++++ b/src/libbpf.pc.template	2021-10-17 18:03:19.681346272 +1100
+@@ -7,6 +7,6 @@
+ Name: libbpf
+ Description: BPF library
+ Version: @VERSION@
+-Libs: -L${libdir} -lbpf
++Libs: -L${libdir} -lbpf -lz
+ Requires.private: libelf zlib
+ Cflags: -I${includedir}