Warn the user of the visibility problem.

Author: ianamason

driver/utils.py

@@ -189,6 +189,9 @@ def __init__(self, inputList, exactMatches={}, patternMatches={}):
             '-nodefaultlibs' : (0, ArgumentListFilter.linkUnaryCallback),
             # darwin flags
             '-dynamiclib' : (0, ArgumentListFilter.linkUnaryCallback),
+            # need to warn the darwin user that this one will rain on their parade
+            '-fvisibility=hidden' :  (0, ArgumentListFilter.darwinWarningCallback),
+            
            }
 
         #
@@ -317,6 +320,13 @@ def linkUnaryCallback(self, flag):
     def compileUnaryCallback(self, flag):
         self.compileArgs.append(flag)
 
+    def darwinWarningCallback(self, flag):
+        if sys.platform.startswith('darwin'):
+            _logger.warning('The flag "{0}" cannot be used with this tool'.format(flag))
+            sys.exit(1)
+        else:
+            self.compileArgs.append(flag)
+
     def defaultBinaryCallback(self, flag, arg):
         _logger.warning('Ignoring compiler arg pair: "{0} {1}"'.format(flag, arg))