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function(do_build_dpdk dpdk_dir)
# mk/machine/native/rte.vars.mk
# rte_cflags are extracted from mk/machine/${machine}/rte.vars.mk
# only 3 of them have -march=<arch> defined, so copying them here.
# we need to pass the -march=<arch> to ${cc} as some headers in dpdk
# require it to compile. for instance, dpdk/include/rte_memcpy.h.
if(CMAKE_SYSTEM_PROCESSOR MATCHES "i386")
set(arch "x86_64")
set(machine "default")
set(machine_tmpl "native")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i686")
set(arch "i686")
set(machine "default")
set(machine_tmpl "native")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|AMD64")
set(arch "x86_64")
set(machine "default")
set(machine_tmpl "native")
set(rte_cflags "-march=core2")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|ARM")
set(arch "arm")
set(machine "armv7a")
set(machine_tmpl "armv7a")
set(rte_cflags "-march=armv7-a")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
set(arch "arm64")
set(machine "armv8a")
set(machine_tmpl "armv8a")
set(rte_cflags "-march=armv8-a+crc")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(powerpc|ppc)64")
set(arch "ppc_64")
set(machine "power8")
set(machine_tmpl "power8")
else()
message(FATAL_ERROR "not able to build DPDK support: "
"unknown arch \"${CMAKE_SYSTEM_PROCESSOR}\"")
endif()
set(dpdk_rte_CFLAGS "${rte_cflags}" CACHE INTERNAL "")
if(CMAKE_SYSTEM_NAME MATCHES "Linux")
set(execenv "linuxapp")
elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
set(execenv "bsdapp")
else()
message(FATAL_ERROR "not able to build DPDK support: "
"unsupported OS \"${CMAKE_SYSTEM_NAME}\"")
endif()
if(CMAKE_C_COMPILER_ID STREQUAL GNU)
set(toolchain "gcc")
elseif(CMAKE_C_COMPILER_ID STREQUAL Clang)
set(toolchain "clang")
elseif(CMAKE_C_COMPILER_ID STREQUAL Intel)
set(toolchain "icc")
else()
message(FATAL_ERROR "not able to build DPDK support: "
"unknown compiler \"${CMAKE_C_COMPILER_ID}\"")
endif()
set(target "${arch}-${machine_tmpl}-${execenv}-${toolchain}")
execute_process(
COMMAND ${CMAKE_MAKE_PROGRAM} showconfigs
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/src/spdk/dpdk
OUTPUT_VARIABLE supported_targets
OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REPLACE "\n" ";" supported_targets "${supported_targets}")
list(FIND supported_targets ${target} found)
if(found EQUAL -1)
message(FATAL_ERROR "not able to build DPDK support: "
"unsupported target. "
"\"${target}\" not listed in ${supported_targets}")
endif()
set(EXTRA_CFLAGS "-Wno-unknown-warning-option -Wno-stringop-truncation -Wno-address-of-packed-member -fPIC")
include(ExternalProject)
ExternalProject_Add(dpdk-ext
SOURCE_DIR ${CMAKE_SOURCE_DIR}/src/spdk/dpdk
CONFIGURE_COMMAND $(MAKE) config O=${dpdk_dir} T=${target}
BUILD_COMMAND env CC=${CMAKE_C_COMPILER} $(MAKE) O=${dpdk_dir} EXTRA_CFLAGS=${EXTRA_CFLAGS}
BUILD_IN_SOURCE 1
INSTALL_COMMAND "true")
ExternalProject_Add_Step(dpdk-ext patch-config
COMMAND ${CMAKE_MODULE_PATH}/patch-dpdk-conf.sh ${dpdk_dir} ${machine} ${arch}
DEPENDEES configure
DEPENDERS build)
# easier to adjust the config
ExternalProject_Add_StepTargets(dpdk-ext configure patch-config build)
endfunction()
function(build_dpdk dpdk_dir)
do_build_dpdk(${dpdk_dir})
set(DPDK_INCLUDE_DIR ${dpdk_dir}/include)
# create the directory so cmake won't complain when looking at the imported
# target
file(MAKE_DIRECTORY ${DPDK_INCLUDE_DIR})
if(NOT TARGET dpdk::cflags)
add_library(dpdk::cflags INTERFACE IMPORTED)
if (dpdk_rte_CFLAGS)
set_target_properties(dpdk::cflags PROPERTIES
INTERFACE_COMPILE_OPTIONS "${dpdk_rte_CFLAGS}")
endif()
endif()
foreach(c
bus_pci
eal
ethdev
kvargs
mbuf
mempool
mempool_ring
pci
ring)
add_library(dpdk::${c} STATIC IMPORTED)
add_dependencies(dpdk::${c} dpdk-ext)
set(dpdk_${c}_LIBRARY
"${dpdk_dir}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}rte_${c}${CMAKE_STATIC_LIBRARY_SUFFIX}")
set_target_properties(dpdk::${c} PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES ${DPDK_INCLUDE_DIR}
INTERFACE_LINK_LIBRARIES dpdk::cflags
IMPORTED_LOCATION "${dpdk_${c}_LIBRARY}")
list(APPEND DPDK_LIBRARIES dpdk::${c})
list(APPEND DPDK_ARCHIVES "${dpdk_${c}_LIBRARY}")
endforeach()
add_library(dpdk::dpdk INTERFACE IMPORTED)
add_dependencies(dpdk::dpdk
${DPDK_LIBRARIES})
# workaround for https://gitlab.kitware.com/cmake/cmake/issues/16947
set_target_properties(dpdk::dpdk PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES ${DPDK_INCLUDE_DIR}
INTERFACE_LINK_LIBRARIES
"-Wl,--whole-archive $<JOIN:${DPDK_ARCHIVES}, > -Wl,--no-whole-archive")
if(dpdk_rte_CFLAGS)
set_target_properties(dpdk::dpdk PROPERTIES
INTERFACE_COMPILE_OPTIONS "${dpdk_rte_CFLAGS}")
endif()
endfunction()
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