darwin linker apparently unrelated to lld and gnu ld

CMakeLists.txt

@@ -99,13 +99,15 @@ target_include_directories(
  PUBLIC ${CMAKE_SOURCE_DIR}/src
  PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 
-set(_link_flags "${PostgreSQL_SHARED_LINK_OPTIONS} -Wl,--version-script=${CMAKE_BINARY_DIR}/hide_symbols.version")
+set(_link_flags "${PostgreSQL_SHARED_LINK_OPTIONS}")
 foreach(_dir ${PostgreSQL_SERVER_LIBRARY_DIRS})
  set(_link_flags "${_link_flags} -L${_dir}")
 endforeach()
 
 if(APPLE)
  set(_link_flags "${_link_flags} -bundle_loader ${PG_BINARY} -undefined dynamic_lookup")
+else()
+set(_link_flags "${_link_flags} -Wl,--version-script=${CMAKE_BINARY_DIR}/hide_symbols.version")
 endif()
 
 
@@ -236,17 +238,18 @@ add_custom_target(
 )
 
 # build machinery to suppress extraneous symbols in .so
-add_custom_target(
- symbol-suppresion
- COMMAND ${CMAKE_SOURCE_DIR}/scripts/build_symbol_suppression.sh ${CMAKE_SOURCE_DIR}/src ${CMAKE_BINARY_DIR}/hide_symbols.version
-)
-add_dependencies(lantern symbol-suppresion)
-set_property(
- TARGET lantern
- APPEND
- PROPERTY ADDITIONAL_CLEAN_FILES hide_symbols.version
-)
-
+if(NOT APPLE)
+ add_custom_target(
+ symbol-suppresion
+ COMMAND ${CMAKE_SOURCE_DIR}/scripts/build_symbol_suppression.sh ${CMAKE_SOURCE_DIR}/src ${CMAKE_BINARY_DIR}/hide_symbols.version
+ )
+ add_dependencies(lantern symbol-suppresion)
+ set_property(
+ TARGET lantern
+ APPEND
+ PROPERTY ADDITIONAL_CLEAN_FILES hide_symbols.version
+ )
+endif()
 
 # DEVELOPMENT
 find_program(CLANG_FORMAT NAMES clang-format)