General:

* Fixed a variety of server browser issues with mods based on this SDK
* Fixed many warnings on various platforms
* Added source code for fgdlib and raytrace
* Updated many source files with the latest shared source from TF2.

OSX:
* Added support for Xcode 4.6
* Switched OSX builds to use Xcode instead of makefiles
* Moved libs from src/lib/osx32 to src/lib/public/osx32 or src/lib/common/osx32 to match windows better.

Linux:
* Moved libs from src/lib/linux32 to src/lib/public/linux32 or src/lib/common/linux32 to match windows better.

sp/src/devtools/base.xcconfig

@@ -0,0 +1,46 @@
+ALWAYS_SEARCH_USER_PATHS = YES
+HEADER_SEARCH_PATHS = $(HEADER_SEARCH_PATHS) $(SDKROOT)/usr/include/malloc
+
+ARCHS = i386
+ONLY_ACTIVE_ARCH = NO
+COPY_PHASE_STRIP = NO
+DEBUG_INFORMATION_FORMAT = dwarf-with-dsym
+
+DEAD_CODE_STRIPPING = YES
+PRESERVE_DEAD_CODE_INITS_AND_TERMS = YES
+
+GCC_C_LANGUAGE_STANDARD = gnu99
+GCC_ENABLE_OBJC_EXCEPTIONS = YES
+GCC_SYMBOLS_PRIVATE_EXTERN = YES
+GCC_INLINES_ARE_PRIVATE_EXTERN = YES
+GCC_REUSE_STRINGS = YES
+
+// CPP11_NO_LIBCXX is used to gate some C++11 features that require that we
+// switch to libc++. We haven't switched to libc++11 because we have been unable
+// to find a clean way to build libcef_dll_wrapper with libc++. 
+// We currently build libcef for Steam which needs to run on 10.5, and Xcode
+// does not support linking with libc++ and targeting 10.5.
+// Once libcef_dll_wrapper has been built with libc++, and you rebuild protobuf
+// with libc++ (which is trivial), you can remove CPP11_NO_LIBCXX and add the
+// following line to the xcconfig:
+// CLANG_CXX_LIBRARY = libc++
+GCC_PREPROCESSOR_DEFINITIONS = _DLL_EXT=.dylib NO_MALLOC_OVERRIDE=1 VPROF_LEVEL=1 NO_HOOK_MALLOC=1 PNG_NO_PEDANTIC_WARNINGS CPP11_NO_LIBCXX
+BASE_CFLAGS= -Usprintf -Ustrncpy -UPROTECTED_THINGS_ENABLE
+
+GCC_WARN_ABOUT_INVALID_OFFSETOF_MACRO = NO
+WARNING_CFLAGS = -Wno-deprecated-writable-strings -Wno-switch-enum -Wno-switch -Wno-unused-value -Wno-parentheses -Wno-logical-op-parentheses -Wno-c++11-narrowing
+
+// CLANG - and use the ccache wrapper
+GCC_VERSION = com.apple.compilers.llvm.clang.1_0
+CC = $(SOURCE_ROOT)/devtools/bin/osx32/xcode_ccache_wrapper
+LDPLUSPLUS = $(DT_TOOLCHAIN_DIR)/usr/bin/clang++
+CLANG_WARN_CXX0X_EXTENSIONS = NO
+CLANG_CXX_LANGUAGE_STANDARD = gnu++11
+
+// include <memory.h> gets confused, 'cause ivp has one, and the system has one, and only one
+// gets into the header map, so sacrifice speed for corectness.
+USE_HEADERMAP = NO
+
+SDKROOT = macosx10.7
+MACOSX_DEPLOYMENT_TARGET = 10.5
+GCC_FAST_MATH = YES

sp/src/devtools/bin/osx32/xcode_ccache_wrapper

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+exec $(dirname $0)/ccache "${DT_TOOLCHAIN_DIR}"/usr/bin/clang -Qunused-arguments "$@"

sp/src/devtools/debug.xcconfig

@@ -0,0 +1,4 @@
+#include "base.xcconfig"
+GCC_OPTIMIZATION_LEVEL = 0
+OTHER_CFLAGS = $(derived) $(BASE_CFLAGS)
+

sp/src/devtools/makefile_base_posix.mak

@@ -42,7 +42,7 @@ CFLAGS = $(ARCH_FLAGS) $(CPPFLAGS) $(WARN_FLAGS) -fvisibility=$(SymbolVisibility
 # In -std=gnu++0x mode we get lots of errors about "error: narrowing conversion". -fpermissive
 # turns these into warnings in gcc, and -Wno-c++11-narrowing suppresses them entirely in clang 3.1+.
 ifeq ($(CXX),clang++)
-	CXXFLAGS = $(CFLAGS) -Wno-c++11-narrowing -Wno-dangling-else
+	CXXFLAGS = $(CFLAGS) -Wno-c++11-narrowing
 else
 	CXXFLAGS = $(CFLAGS) -fpermissive
 endif

sp/src/devtools/release.xcconfig

@@ -0,0 +1,4 @@
+#include "base.xcconfig"
+
+GCC_OPTIMIZATION_LEVEL = 2
+OTHER_CFLAGS = $(derived) $(BASE_CFLAGS) -ftree-vectorize -fpredictive-commoning -funswitch-loops