cmake: Use -Wl,-export_dynamic when building for macOS

The macOS linker does not accept --export-dynamic, so use this
alternate spelling.

(cherry picked from commit c7f6d072522702a505de71b3faa2ff160bde848e)
Backported-from: dbus!278

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2eb4b52c514c77359ec77b0d8b899a553924aa4b..ae9700db60da372a8cb7c6cde54a4f06bbb79cdb 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -377,8 +377,13 @@ endif()
 
 if(UNIX AND NOT DBUS_DISABLE_ASSERT)
     # required for backtrace
-    string(APPEND CMAKE_SHARED_LINKER_FLAGS " -Wl,--export-dynamic")
-    string(APPEND CMAKE_EXE_LINKER_FLAGS " -Wl,--export-dynamic")
+    if (APPLE)
+        string(APPEND CMAKE_SHARED_LINKER_FLAGS " -Wl,-export_dynamic")
+        string(APPEND CMAKE_EXE_LINKER_FLAGS " -Wl,-export_dynamic")
+    else()
+        string(APPEND CMAKE_SHARED_LINKER_FLAGS " -Wl,--export-dynamic")
+        string(APPEND CMAKE_EXE_LINKER_FLAGS " -Wl,--export-dynamic")
+    endif()
     set(DBUS_BUILT_R_DYNAMIC 1)
 endif()