cmake: make peer discovery build optional

.github/workflows/ccpp.yml

@@ -20,7 +20,7 @@ jobs:
       run: |
         cd argon2 && make && sudo make install && cd ..
     - name: configure
-      run: ./configure
+      run: ./configure --enable-proxy-client --enable-proxy-server --enable-push-notifications
     - name: make
       run: make
     - name: make check

CMakeLists.txt

@@ -22,6 +22,7 @@ option (OPENDHT_PROXY_SERVER_IDENTITY "Allow clients to use the node identity" O
 option (OPENDHT_PROXY_CLIENT "Enable DHT proxy client, use Restinio and jsoncpp" OFF)
 option (OPENDHT_PROXY_OPENSSL "Build DHT proxy with OpenSSL" ON)
 option (OPENDHT_PROXY_HTTP_PARSER_FORK "Build DHT proxy with custom http_parser to support old API" OFF)
+option (OPENDHT_PEER_DISCOVERY "Enable multicast peer discovery" ON)
 option (OPENDHT_INDEX "Build DHT indexation feature" OFF)
 option (OPENDHT_TESTS "Add unit tests executable" OFF)
 option (OPENDHT_C "Build C bindings" OFF)
@@ -177,7 +178,6 @@ list (APPEND opendht_SOURCES
     src/securedht.cpp
     src/dhtrunner.cpp
     src/log.cpp
-    src/peer_discovery.cpp
     src/network_utils.cpp
     src/thread_pool.cpp
 )
@@ -203,12 +203,17 @@ list (APPEND opendht_HEADERS
     include/opendht/securedht.h
     include/opendht/log.h
     include/opendht/log_enable.h
-    include/opendht/peer_discovery.h
     include/opendht/thread_pool.h
     include/opendht/network_utils.h
     include/opendht.h
 )
 
+if (OPENDHT_PEER_DISCOVERY)
+    list (APPEND opendht_SOURCES src/peer_discovery.cpp)
+    list (APPEND opendht_HEADERS include/opendht/peer_discovery.h)
+    add_definitions(-DOPENDHT_PEERDISCOVERY)
+endif()
+
 if (OPENDHT_PYTHON)
     message("Indexation enabled since it is required for Python support")
     set(OPENDHT_INDEX ON)
@@ -392,6 +397,12 @@ if (OPENDHT_TESTS)
             tests/dhtproxytester.cpp
         )
     endif()
+    if (OPENDHT_PEER_DISCOVERY)
+        list (APPEND test_FILES
+            tests/peerdiscoverytester.h
+            tests/peerdiscoverytester.cpp
+        )
+    endif()
     add_executable(opendht_unit_tests
         tests/tests_runner.cpp
         ${test_FILES}

tests/compile_http.sh

-g++ -Wall -Wextra -Wfatal-errors -pedantic -g ../src/http.cpp tests_runner.cpp httptester.cpp -o run.out -lopendht -lpthread -lcppunit -ljsoncpp -DOPENDHT_JSONCPP -I../include/opendht -DASIO_STANDALONE