zeek/auxil/zeek-aux/cmake/PCAPTests.cmake
Patrick Kelley 8fd444092b initial
2025-05-07 15:35:15 -04:00

52 lines
1.4 KiB
CMake

include(CheckFunctionExists)
include(CheckSymbolExists)
include(CheckCSourceCompiles)
include(CheckIncludeFiles)
set(PCAP_OS_LIBRARIES)
if (MSVC)
set(PCAP_OS_LIBRARIES ws2_32.lib Crypt32.lib ${OPENSSL_LIBRARIES})
endif ()
set(CMAKE_REQUIRED_INCLUDES ${PCAP_INCLUDE_DIR})
set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY} ${PCAP_OS_LIBRARIES})
cmake_policy(PUSH)
if (POLICY CMP0075)
# It's fine that check_include_files links against CMAKE_REQUIRED_LIBRARIES
cmake_policy(SET CMP0075 NEW)
endif ()
check_include_files(pcap-int.h HAVE_PCAP_INT_H)
cmake_policy(POP)
check_symbol_exists(pcap_freecode pcap.h HAVE_LIBPCAP_PCAP_FREECODE)
if (NOT HAVE_LIBPCAP_PCAP_FREECODE)
set(DONT_HAVE_LIBPCAP_PCAP_FREECODE true)
message(STATUS "No implementation for pcap_freecode()")
endif ()
if (DONT_HAVE_LIBPCAP_PCAP_FREECODE AND NOT HAVE_PCAP_INT_H)
message(FATAL_ERROR "pcap-int.h required to implement pcap_freecode() internally")
endif ()
check_symbol_exists(DLT_PPP_SERIAL pcap.h HAVE_DLT_PPP_SERIAL)
if (NOT HAVE_DLT_PPP_SERIAL)
set(DLT_PPP_SERIAL 50)
endif ()
check_symbol_exists(DLT_NFLOG pcap.h HAVE_DLT_NFLOG)
if (NOT HAVE_DLT_NFLOG)
set(DLT_NFLOG 239)
endif ()
check_symbol_exists(DLT_LINUX_SLL2 pcap.h HAVE_DLT_LINUX_SLL2)
if (NOT HAVE_DLT_LINUX_SLL2)
set(DONT_HAVE_LIBPCAP_DLT_LINUX_SLL2 true)
message(STATUS "No DLT_LINUX_SLL2 support in libpcap")
endif ()
set(CMAKE_REQUIRED_INCLUDES)
set(CMAKE_REQUIRED_LIBRARIES)