Try exported symbols list for Apple

visibility annotations seem to be working for gcc

CMakeLists.txt

@@ -61,10 +61,12 @@ add_custom_command(
     ${CMAKE_OBJCOPY} --keep-global-symbols=${CMAKE_SOURCE_DIR}/symbols.txt
     $<TARGET_FILE:${PROJECT_NAME}_static>)
 
-if(NOT APPLE)
+if(APPLE)
   target_link_options(
-    ${PROJECT_NAME} PRIVATE
-    "LINKER:-export-symbols=${CMAKE_CURRENT_SOURCE_DIR}/linker.map")
+    ${PROJECT_NAME}
+    PRIVATE
+    "LINKER:-no_weak_exports,-exported_symbols_list,${CMAKE_SOURCE_DIR}/symbols.txt"
+  )
 endif()
 
 set(TEST_FLAGS -Wall -Wextra -Wpedantic -Wunreachable-code -UNDEBUG)

ConflictSet.cpp

@@ -1305,7 +1305,7 @@ void printLogical(std::string &result, Node *node) {
   }
 }
 
-void debugPrintDot(FILE *file, Node *node) {
+[[maybe_unused]] void debugPrintDot(FILE *file, Node *node) {
 
   struct DebugDotPrinter {
 
@@ -1353,7 +1353,7 @@ void checkParentPointers(Node *node, bool &success) {
   }
 }
 
-int64_t checkMaxVersion(Node *node, bool &success) {
+[[maybe_unused]] int64_t checkMaxVersion(Node *node, bool &success) {
   int64_t expected =
       node->entryPresent
           ? std::max(node->entry.pointVersion, node->entry.rangeVersion)