Link against libpcap.so

Author: JNNGL

.github/workflows/build.yml

@@ -8,6 +8,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3.0.1
+        with:
+          submodules: true
       - name: Install libpcap-dev
         run: sudo apt install libpcap-dev
       - name: Set up JDK 11

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "src/main/c/libpcap"]
+	path = src/main/c/libpcap
+	url = https://github.com/the-tcpdump-group/libpcap

src/main/c/CMakeLists.txt

@@ -5,6 +5,10 @@ project(pcap-native LANGUAGES C)
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 
+add_subdirectory(libpcap)
+set_property(TARGET pcap PROPERTY SOVERSION)
+set_property(TARGET pcap PROPERTY VERSION)
+
 set(LIB_OUTPUT_DIR ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIB_OUTPUT_DIR})
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIB_OUTPUT_DIR})