+if(CMAKE_CROSSCOMPILING)
+ set(CMAKE_IGNORE_PATH
+ /usr/lib/${CMAKE_HOST_SYSTEM_PROCESSOR}-linux-gnu/
+ /usr/lib/${CMAKE_HOST_SYSTEM_PROCESSOR}-linux-gnu/lib/
+ )
+endif()
+set(CMAKE_C_COMPILER_TARGET ${CMAKE_SYSTEM_PROCESSOR}-linux-gnu)
+
+##############################################################################
+# build config
+##############################################################################
+check_c_compiler_flag("-Wno-address-of-packed-member"
+ compiler_flag_no_address_of_packed_member)
+set(VPP_RUNTIME_DIR ${CMAKE_INSTALL_BINDIR} CACHE STRING "Relative runtime directory path")
+set(VPP_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING "Relative library directory path")
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${VPP_RUNTIME_DIR})
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${VPP_LIBRARY_DIR})
+set(VPP_BINARY_DIR ${CMAKE_BINARY_DIR}/CMakeFiles)
+set(PYENV PYTHONPYCACHEPREFIX=${CMAKE_BINARY_DIR}/CMakeFile/__pycache__)
+
+if (CMAKE_BUILD_TYPE)
+ add_compile_options(-g -Werror -Wall)
+endif()
+
+if (compiler_flag_no_address_of_packed_member)
+ add_compile_options(-Wno-address-of-packed-member)
+endif()
+
+string(TOLOWER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_LC)
+string(TOUPPER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_UC)
+
+set(CMAKE_C_FLAGS_RELEASE "")
+set(CMAKE_C_FLAGS_DEBUG "")
+
+if (${CMAKE_BUILD_TYPE_LC} MATCHES "release")
+ add_compile_options(-O3 -fstack-protector -fno-common)
+ add_compile_definitions(_FORTIFY_SOURCE=2)
+elseif (${CMAKE_BUILD_TYPE_LC} MATCHES "debug")
+ add_compile_options(-O0 -fstack-protector -fno-common)
+ add_compile_definitions(CLIB_DEBUG)
+elseif (${CMAKE_BUILD_TYPE_LC} MATCHES "coverity")
+ add_compile_options(-O0)
+ add_compile_definitions(__COVERITY__)
+elseif (${CMAKE_BUILD_TYPE_LC} MATCHES "gcov")
+ add_compile_options(-O0 -fprofile-arcs -ftest-coverage)
+ add_compile_definitions(CLIB_DEBUG CLIB_GCOV)
+endif()
+
+set(BUILD_TYPES release debug coverity gcov)
+string(REPLACE ";" " " BUILD_TYPES_STR "${BUILD_TYPES}")
+set_property(CACHE CMAKE_BUILD_TYPE PROPERTY
+ HELPSTRING "Build type - valid options are: ${BUILD_TYPES_STR}")
+
+##############################################################################
+# link time optimizations
+##############################################################################
+if (CMAKE_BUILD_TYPE_UC STREQUAL "RELEASE")
+ check_ipo_supported(RESULT _result)
+ if (_result)
+ option(VPP_USE_LTO "Link time optimization of release binaries" ON)