Modified the ArchSpec to take an optional "Platform *" when setting the triple.
This allows you to have a platform selected, then specify a triple using
"i386" and have the remaining triple items (vendor, os, and environment) set
automatically.

Many interpreter commands take the "--arch" option to specify an architecture
triple, so now the command options needed to be able to get to the current
platform, so the Options class now take a reference to the interpreter on
construction.

Modified the build LLVM building in the Xcode project to use the new
Xcode project level user definitions:

LLVM_BUILD_DIR - a path to the llvm build directory
LLVM_SOURCE_DIR - a path to the llvm sources for the llvm that will be used to build lldb
LLVM_CONFIGURATION - the configuration that lldb is built for (Release, 
Release+Asserts, Debug, Debug+Asserts).

I also changed the LLVM build to not check if "lldb/llvm" is a symlink and
then assume it is a real llvm build directory versus the unzipped llvm.zip
package, so now you can actually have a "lldb/llvm" directory in your lldb
sources.




git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@129112 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Commands/CommandObjectExpression.cpp b/source/Commands/CommandObjectExpression.cpp
index 220801f..5e5f968 100644
--- a/source/Commands/CommandObjectExpression.cpp
+++ b/source/Commands/CommandObjectExpression.cpp
@@ -37,8 +37,8 @@
 using namespace lldb;
 using namespace lldb_private;
 
-CommandObjectExpression::CommandOptions::CommandOptions () :
-    Options()
+CommandObjectExpression::CommandOptions::CommandOptions (CommandInterpreter &interpreter) :
+    Options(m_interpreter)
 {
     // Keep only one place to reset the values to their defaults
     ResetOptionValues();
@@ -115,6 +115,7 @@
                    "expression",
                    "Evaluate a C/ObjC/C++ expression in the current program context, using variables currently in scope.",
                    NULL),
+    m_options (interpreter),
     m_expr_line_count (0),
     m_expr_lines ()
 {