Merge remote-tracking branch 'origin/topic/timw/vcpkg'

* origin/topic/timw/vcpkg:
  Use pcap_static as the library name on Windows
  Remove unused conan.cmake
  Make test for pcap_code look for a symbol instead of the header

FindPCAP.cmake

@@ -29,7 +29,11 @@ else ()
     set(_pcap_lib_hint_path ${PCAP_ROOT_DIR}/lib)
 endif ()
 
-find_library(PCAP_LIBRARY NAMES pcap wpcap HINTS ${_pcap_lib_hint_path})
+if (MSVC)
+  find_library(PCAP_LIBRARY NAMES pcap_static wpcap HINTS ${_pcap_lib_hint_path})
+else ()
+  find_library(PCAP_LIBRARY NAMES pcap wpcap HINTS ${_pcap_lib_hint_path})
+endif ()
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(PCAP DEFAULT_MSG PCAP_LIBRARY PCAP_INCLUDE_DIR)

PCAPTests.cmake

@@ -21,12 +21,16 @@ check_include_files(pcap-int.h HAVE_PCAP_INT_H)
 
 cmake_policy(POP)
 
-check_function_exists(pcap_freecode HAVE_LIBPCAP_PCAP_FREECODE)
+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)