2010-01-10 Doug Kwan <dougkwan@google.com>

* options.h (DEFINE_var): Use parentheses around argument varname__
	in macro body to avoid any unintended subsequent substitutions.

gold/ChangeLog

@@ -1,3 +1,8 @@
+2010-01-10  Doug Kwan  <dougkwan@google.com>
+
+	* options.h (DEFINE_var): Use parentheses around argument varname__
+	in macro body to avoid any unintended subsequent substitutions.
+
 2010-01-10  Ian Lance Taylor  <iant@google.com>
 
 	* resolve.cc (Symbol_table::resolve): Add symbols to list of ODR

gold/options.h

@@ -244,12 +244,18 @@ struct Struct_special : public Struct_var
 // var() and set_var() as General_options methods.  Arguments as are
 // for the constructor for One_option.  param_type__ is the same as
 // type__ for built-in types, and "const type__ &" otherwise.
+//
+// When we define the linker command option "assert", the macro argument
+// varname__ of DEFINE_var below will be replaced by "assert".  On Mac OSX
+// assert.h is included implicitly by one of the library headers we use.  To
+// avoid unintended macro substitution of "assert()", we need to enclose
+// varname__ with parenthese.
 #define DEFINE_var(varname__, dashes__, shortname__, default_value__,        \
                    default_value_as_string__, helpstring__, helparg__,       \
                    optional_arg__, type__, param_type__, parse_fn__)	     \
  public:                                                                     \
   param_type__                                                               \
-  varname__() const                                                          \
+  (varname__)() const                                                        \
   { return this->varname__##_.value; }                                       \
                                                                              \
   bool                                                                       \