cmake: add exports file for Apple

Author: madebr

.github/workflows/main.yml

@@ -76,6 +76,13 @@ jobs:
           cmake --install build/ --config Release
           echo "SDL3_net_ROOT=$(pwd)/prefix" >> $GITHUB_ENV
           ( cd prefix; find . ) | LC_ALL=C sort -u
+
+      - name: Verify exports files
+        if: ${{ matrix.platform.test-exports }}
+        run: |
+          set -e
+          python src/genexports.py
+          git diff --exit-code -- src/SDL_net.sym src/SDL_net.exports
       - name: Verify CMake configuration files
         run: |
           cmake -S cmake/test -B cmake_config_build \

CMakeLists.txt

@@ -158,12 +158,15 @@ if(NOT ANDROID)
         VERSION "${SO_VERSION}"
     )
     if(APPLE)
-        cmake_minimum_required(VERSION 3.17...3.28)
         set_target_properties(${sdl3_net_target_name} PROPERTIES
             MACHO_COMPATIBILITY_VERSION "${DYLIB_COMPAT_VERSION}"
             MACHO_CURRENT_VERSION "${DYLIB_CURRENT_VERSION}"
         )
         sdl_no_deprecated_errors(${sdl3_net_target_name})
+        set_property(TARGET ${sdl3_net_target_name} APPEND PROPERTY LINK_DEPENDS
+                "${PROJECT_SOURCE_DIR}/src/SDL_net.exports")
+        target_link_options(${sdl3_net_target_name} PRIVATE
+                "SHELL:-Wl,-exported_symbols_list,${PROJECT_SOURCE_DIR}/src/SDL_net.exports")
     endif()
 endif()
 if(SDLNET_BUILD_SHARED_LIBS)

src/SDL_net.exports

@@ -0,0 +1,35 @@
+# SDL3_net.dylib exports
+_NET_AcceptClient
+_NET_CompareAddresses
+_NET_CreateClient
+_NET_CreateDatagramSocket
+_NET_CreateServer
+_NET_DestroyDatagram
+_NET_DestroyDatagramSocket
+_NET_DestroyServer
+_NET_DestroyStreamSocket
+_NET_FreeLocalAddresses
+_NET_GetAddressStatus
+_NET_GetAddressString
+_NET_GetConnectionStatus
+_NET_GetLocalAddresses
+_NET_GetStreamSocketAddress
+_NET_GetStreamSocketPendingWrites
+_NET_Version
+_NET_Init
+_NET_Quit
+_NET_ReadFromStreamSocket
+_NET_ReceiveDatagram
+_NET_RefAddress
+_NET_ResolveHostname
+_NET_SendDatagram
+_NET_SimulateAddressResolutionLoss
+_NET_SimulateDatagramPacketLoss
+_NET_SimulateStreamPacketLoss
+_NET_UnrefAddress
+_NET_WaitUntilConnected
+_NET_WaitUntilInputAvailable
+_NET_WaitUntilResolved
+_NET_WaitUntilStreamSocketDrained
+_NET_WriteToStreamSocket
+# extra symbols go here (don't modify this line)

src/SDL_net.sym

@@ -33,5 +33,6 @@ SDL3_net_0.0.0 {
     NET_WaitUntilResolved;
     NET_WaitUntilStreamSocketDrained;
     NET_WriteToStreamSocket;
+    # extra symbols go here (don't modify this line)
   local: *;
 };