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Merge remote branch 'origin/topic/jsiwek/findpcap_pfring'

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* origin/topic/jsiwek/findpcap_pfring:
  FindPCAP now links against thread library when necessary (e.g. PF_RING's libpcap)

Closes #589.
This commit is contained in:
Robin Sommer 2011-09-04 08:54:59 -07:00
commit e49dc83de6
1 changed files with 27 additions and 3 deletions
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26
cmake/FindPCAP.cmake
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@ -15,7 +15,8 @@
#
# PCAP_FOUND System has libpcap, include and library dirs found
# PCAP_INCLUDE_DIR The libpcap include directories.
# PCAP_LIBRARY The libpcap library.
# PCAP_LIBRARY The libpcap library (possibly includes a thread
# library e.g. required by pf_ring's libpcap)
find_path(PCAP_ROOT_DIR
NAMES include/pcap.h
@ -37,6 +38,29 @@ find_package_handle_standard_args(PCAP DEFAULT_MSG
PCAP_INCLUDE_DIR
)
include(CheckCSourceCompiles)
set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY})
check_c_source_compiles("int main() { return 0; }" PCAP_LINKS_SOLO)
set(CMAKE_REQUIRED_LIBRARIES)
# check if linking against libpcap also needs to link against a thread library
if (NOT PCAP_LINKS_SOLO)
find_package(Threads)
if (THREADS_FOUND)
set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
check_c_source_compiles("int main() { return 0; }" PCAP_NEEDS_THREADS)
set(CMAKE_REQUIRED_LIBRARIES)
endif ()
if (THREADS_FOUND AND PCAP_NEEDS_THREADS)
set(_tmp ${PCAP_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
list(REMOVE_DUPLICATES _tmp)
set(PCAP_LIBRARY ${_tmp}
CACHE STRING "Libraries needed to link against libpcap" FORCE)
else ()
message(FATAL_ERROR "Couldn't determine how to link against libpcap")
endif ()
endif ()
mark_as_advanced(
PCAP_ROOT_DIR
PCAP_INCLUDE_DIR