Ticket #51844: qt4-SL-Libcxx-fix-revised.diff

Portfile

@@ -585 +585 @@
 
     }
 
+    # on Leopard and Snow Leopard with libc++ForOlderSystems installed, SDK must be unset as we can only use system libraries
+    # also, a missing library link must be replaced for build to succeed
+    # <https://trac.macports.org/ticket/51844>
+    platform darwin {
+        if {${os.major} == 9 || ${os.major} == 10} {
+            if {${configure.cxx_stdlib} eq "libc++"} {
+                set SDK ""
+                configure.ldflags-append "-lobjc"
+            }
+        }
+    }
+
     # set the SDK, if it was found and exists
 
     if {[file exists ${SDK}]} {