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Annotation of previous/cmake/FindPCAP.cmake, revision 1.1.1.1

1.1       root        1: # - Try to find libpcap include dirs and libraries
                      2: #
                      3: # Usage of this module as follows:
                      4: #
                      5: #     find_package(PCAP)
                      6: #
                      7: # Variables used by this module, they can change the default behaviour and need
                      8: # to be set before calling find_package:
                      9: #
                     10: #  PCAP_ROOT_DIR             Set this variable to the root installation of
                     11: #                            libpcap if the module has problems finding the
                     12: #                            proper installation path.
                     13: #
                     14: # Variables defined by this module:
                     15: #
                     16: #  PCAP_FOUND                System has libpcap, include and library dirs found
                     17: #  PCAP_INCLUDE_DIR          The libpcap include directories.
                     18: #  PCAP_LIBRARY              The libpcap library (possibly includes a thread
                     19: #                            library e.g. required by pf_ring's libpcap)
                     20: #  HAVE_PF_RING              If a found version of libpcap supports PF_RING
                     21: 
                     22: find_path(PCAP_ROOT_DIR
                     23:     NAMES include/pcap.h
                     24:     HINTS /c/MinGW/WpdPack
                     25: )
                     26: 
                     27: find_path(PCAP_INCLUDE_DIR
                     28:     NAMES pcap.h
                     29:     HINTS ${PCAP_ROOT_DIR}/include
                     30: )
                     31: 
                     32: find_library(PCAP_LIBRARY
                     33:     NAMES pcap wpcap
                     34:     HINTS ${PCAP_ROOT_DIR}/lib ${PCAP_ROOT_DIR}/Lib
                     35: )
                     36: 
                     37: include(FindPackageHandleStandardArgs)
                     38: find_package_handle_standard_args(PCAP DEFAULT_MSG
                     39:     PCAP_LIBRARY
                     40:     PCAP_INCLUDE_DIR
                     41: )
                     42: 
                     43: include(CheckCSourceCompiles)
                     44: set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY})
                     45: check_c_source_compiles("int main() { return 0; }" PCAP_LINKS_SOLO)
                     46: set(CMAKE_REQUIRED_LIBRARIES)
                     47: 
                     48: # check if linking against libpcap also needs to link against a thread library
                     49: if (NOT PCAP_LINKS_SOLO)
                     50:     find_package(Threads)
                     51:     if (THREADS_FOUND)
                     52:         set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
                     53:         check_c_source_compiles("int main() { return 0; }" PCAP_NEEDS_THREADS)
                     54:         set(CMAKE_REQUIRED_LIBRARIES)
                     55:     endif ()
                     56:     if (THREADS_FOUND AND PCAP_NEEDS_THREADS)
                     57:         set(_tmp ${PCAP_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
                     58:         list(REMOVE_DUPLICATES _tmp)
                     59:         set(PCAP_LIBRARY ${_tmp}
                     60:             CACHE STRING "Libraries needed to link against libpcap" FORCE)
                     61:     else ()
                     62:         message(FATAL_ERROR "Couldn't determine how to link against libpcap")
                     63:     endif ()
                     64: endif ()
                     65: 
                     66: include(CheckFunctionExists)
                     67: set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY})
                     68: check_function_exists(pcap_get_pfring_id HAVE_PF_RING)
                     69: set(CMAKE_REQUIRED_LIBRARIES)
                     70: 
                     71: mark_as_advanced(
                     72:     PCAP_ROOT_DIR
                     73:     PCAP_INCLUDE_DIR
                     74:     PCAP_LIBRARY
                     75: )

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