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#############################################################################
# Copyright (c) 2023 Attila Szakacs
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# As an additional exemption you are allowed to compile & link against the
# OpenSSL libraries as published by the OpenSSL project. See the file
# COPYING for details.
#
#############################################################################
find_package(PkgConfig)
pkg_check_modules(LIBBPF QUIET libbpf>=1.0.1)
if (LIBBPF_FOUND)
find_program(BPF_CC clang)
find_program(BPFTOOL bpftool)
if ((NOT BPF_CC) OR (NOT BPFTOOL))
set(LIBBPF_FOUND FALSE)
else ()
execute_process(COMMAND ${BPF_CC} -print-file-name=include OUTPUT_VARIABLE CLANG_INCLUDES OUTPUT_STRIP_TRAILING_WHITESPACE)
pkg_get_variable(LIBBPF_INCLUDE_DIRS_RAW libbpf includedir)
set(BPF_CFLAGS -nostdinc -isystem ${CLANG_INCLUDES} -target bpf -I${CMAKE_CURRENT_BINARY_DIR} -I${LIBBPF_INCLUDE_DIRS_RAW} -fPIC -O2 -g)
endif ()
endif ()
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