Enable precompiled headers for all platforms

indra/newview/CMakeLists.txt

@@ -1417,6 +1417,18 @@ if (DARWIN)
   LIST(APPEND viewer_SOURCE_FILES llfilepicker_mac.mm)
   LIST(APPEND viewer_HEADER_FILES llfilepicker_mac.h)
 
+  set_source_files_properties(
+    llappviewermacosx-objc.mm
+    PROPERTIES
+    SKIP_PRECOMPILE_HEADERS TRUE
+  )
+
+  set_source_files_properties(
+    llfilepicker_mac.mm
+    PROPERTIES
+    SKIP_PRECOMPILE_HEADERS TRUE
+  )
+
   # This should be compiled with the viewer.
   LIST(APPEND viewer_SOURCE_FILES llappdelegate-objc.mm)
   set_source_files_properties(
@@ -1705,6 +1717,10 @@ list(APPEND EVENT_HOST_SCRIPTS ${EVENT_HOST_SCRIPT_GLOB_LIST})
 set(PACKAGE ON CACHE BOOL
     "Add a package target that builds an installer package.")
 
+if(USE_PRECOMPILED_HEADERS)
+  target_precompile_headers( ${VIEWER_BINARY_NAME} PRIVATE llviewerprecompiledheaders.h )
+endif(USE_PRECOMPILED_HEADERS)
+
 if (WINDOWS)
     set_target_properties(${VIEWER_BINARY_NAME}
         PROPERTIES
@@ -1715,10 +1731,6 @@ if (WINDOWS)
         )
     target_compile_options(${VIEWER_BINARY_NAME} PRIVATE /bigobj)
 
-    if(USE_PRECOMPILED_HEADERS)
-       target_precompile_headers( ${VIEWER_BINARY_NAME} PRIVATE llviewerprecompiledheaders.h )
-    endif(USE_PRECOMPILED_HEADERS)
-
     # If adding a file to viewer_manifest.py in the WindowsManifest.construct() method, be sure to add the dependency
     # here.
     # *NOTE:Mani - This is a crappy hack to have important dependencies for the viewer_manifest copy action