varun-r-mallya/pylibbpf
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update CMakeLists.txt

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varun-r-mallya
2025-09-21 11:53:25 +05:30
parent 06eec0a9cd
commit a1c7f26242
1 changed files with 26 additions and 27 deletions
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53
CMakeLists.txt
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@ -1,39 +1,38 @@
cmake_minimum_required(VERSION 4.0) cmake_minimum_required(VERSION 3.16) # 4.0 does not exist
project(pylibbpf) project(pylibbpf)
# pybind11
add_subdirectory(pybind11) add_subdirectory(pybind11)
pybind11_add_module(pylibbpf src/main.cpp) pybind11_add_module(pylibbpf src/main.cpp)
include(ExternalProject) # --- libbpf build rules ---
ExternalProject_Add( set(LIBBPF_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/libbpf/src)
libbpf_build set(LIBBPF_BUILD_DIR ${CMAKE_CURRENT_BINARY_DIR}/libbpf)
PREFIX libbpf set(LIBBPF_A ${LIBBPF_BUILD_DIR}/libbpf.a)
SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/libbpf/src
CONFIGURE_COMMAND ""
BUILD_COMMAND
make BUILD_STATIC_ONLY=1 OBJDIR=${CMAKE_CURRENT_BINARY_DIR}/libbpf/libbpf
DESTDIR=${CMAKE_CURRENT_BINARY_DIR}/libbpf INCLUDEDIR= LIBDIR= UAPIDIR=
install install_uapi_headers
BUILD_IN_SOURCE TRUE
INSTALL_COMMAND ""
STEP_TARGETS build)
# Define a static library target pointing to the built libbpf.a add_custom_command(
OUTPUT ${LIBBPF_A}
COMMAND make BUILD_STATIC_ONLY=1 OBJDIR=${LIBBPF_BUILD_DIR} -C
${LIBBPF_SRC_DIR}
WORKING_DIRECTORY ${LIBBPF_SRC_DIR}
COMMENT "Building libbpf.a"
VERBATIM)
add_custom_target(libbpf_build ALL DEPENDS ${LIBBPF_A})
# Define static lib as imported
add_library(libbpf_static STATIC IMPORTED GLOBAL) add_library(libbpf_static STATIC IMPORTED GLOBAL)
set(LIBBPF_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/libbpf/include)
set_target_properties( set_target_properties(
libbpf_static libbpf_static
PROPERTIES IMPORTED_LOCATION "${CMAKE_CURRENT_BINARY_DIR}/libbpf/libbpf.a" PROPERTIES IMPORTED_LOCATION ${LIBBPF_A}
INTERFACE_INCLUDE_DIRECTORIES "${LIBBPF_INCLUDE_DIRS}") INTERFACE_INCLUDE_DIRECTORIES
# Ensure build order: external project builds before linking ${CMAKE_CURRENT_SOURCE_DIR}/libbpf/include)
add_dependencies(libbpf_static libbpf_build)
add_dependencies(pylibbpf libbpf_static)
# Version info add_dependencies(libbpf_static libbpf_build)
# Link pybind11 module against libbpf
target_link_libraries(pylibbpf PRIVATE libbpf_static)
# Version info for Python extension
target_compile_definitions(pylibbpf target_compile_definitions(pylibbpf
PRIVATE VERSION_INFO=${PYLIBBPF_VERSION_INFO}) PRIVATE VERSION_INFO=${PYLIBBPF_VERSION_INFO})
# Link the actual library target
target_link_libraries(pylibbpf PRIVATE libbpf_static)