diff --git a/.gitignore b/.gitignore
index ceeca319..011d70f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,6 +26,7 @@ ipch
 *.xcodeproj/
 obj*/
 !devtools/*.mak
+sp/src/devtools/makefile_base_posix.mak.link
 !utils/smdlexp/smdlexp.mak
 
 # Specific Source build products
diff --git a/sp/src/devtools/makefile_base_posix.mak b/sp/src/devtools/makefile_base_posix.mak
index cd5f498a..ae2bfb69 100644
--- a/sp/src/devtools/makefile_base_posix.mak
+++ b/sp/src/devtools/makefile_base_posix.mak
@@ -1,509 +1,14 @@
-#
-# Base makefile for Linux and OSX
-#
-# !!!!! Note to future editors !!!!!
-# 
-# before you make changes, make sure you grok:
-# 1. the difference between =, :=, +=, and ?= 
-# 2. how and when this base makefile gets included in the generated makefile(s)
-#  ( see http://www.gnu.org/software/make/manual/make.html#Flavors )
-#
-# Command line prefixes:
-#  -	errors are ignored
-#  @	command is not printed to stdout before being executed
-#  +	command is executed even if Make is invoked in "do not exec" mode
-
-OS := $(shell uname)
-HOSTNAME := $(shell hostname)
-
--include $(SRCROOT)/devtools/steam_def.mak
--include $(SRCROOT)/devtools/sourcesdk_def.mak
-
-# To build with clang, set the following in your environment:
-#   CC = clang
-#   CXX = clang++
-
-ifeq ($(CFG), release)
-	# With gcc 4.6.3, engine.so went from 7,383,765 to 8,429,109 when building with -O3.
-	#  There also was no speed difference running at 1280x1024. May 2012, mikesart.
-	#  tonyp: The size increase was likely caused by -finline-functions and -fipa-cp-clone getting switched on with -O3.
-	# -fno-omit-frame-pointer: need this for stack traces with perf.
-	OptimizerLevel_CompilerSpecific = -O2 -fno-strict-aliasing -ffast-math -fno-omit-frame-pointer -ftree-vectorize -fpredictive-commoning -funswitch-loops
-else
-	OptimizerLevel_CompilerSpecific = -O0
-	#-O1 -finline-functions
-endif
-
-# CPPFLAGS == "c/c++ *preprocessor* flags" - not "cee-plus-plus flags"
-ARCH_FLAGS = 
-BUILDING_MULTI_ARCH = 0
-CPPFLAGS = $(DEFINES) $(addprefix -I, $(abspath $(INCLUDEDIRS) ))
-CFLAGS = $(ARCH_FLAGS) $(CPPFLAGS) $(WARN_FLAGS) -fvisibility=$(SymbolVisibility) $(OptimizerLevel) -pipe $(GCC_ExtraCompilerFlags) -Usprintf -Ustrncpy -UPROTECTED_THINGS_ENABLE
-# In -std=gnu++0x mode we get lots of errors about "error: narrowing conversion". -fpermissive
-# turns these into warnings in gcc, and -Wno-c++11-narrowing suppresses them entirely in clang 3.1+.
-ifeq ($(CXX),clang++)
-	CXXFLAGS = $(CFLAGS) -std=gnu++0x -Wno-c++11-narrowing -Wno-dangling-else
-else
-	CXXFLAGS = $(CFLAGS) -std=gnu++0x -fpermissive
-endif
-DEFINES += -DVPROF_LEVEL=1 -DGNUC -DNO_HOOK_MALLOC -DNO_MALLOC_OVERRIDE
-LDFLAGS = $(CFLAGS) $(GCC_ExtraLinkerFlags) $(OptimizerLevel)
-GENDEP_CXXFLAGS = -MD -MP -MF $(@:.o=.P) 
-MAP_FLAGS =
-Srv_GAMEOUTPUTFILE = 
-COPY_DLL_TO_SRV = 0
-
-
-ifeq ($(STEAM_BRANCH),1)
-	WARN_FLAGS = -Wall -Wextra -Wshadow -Wno-invalid-offsetof
-else
-	WARN_FLAGS = -Wno-write-strings -Wno-multichar
-endif
-
-WARN_FLAGS += -Wno-unknown-pragmas -Wno-unused-parameter -Wno-unused-value -Wno-missing-field-initializers -Wno-sign-compare -Wno-reorder -Wno-invalid-offsetof -Wno-float-equal -Werror=return-type -fdiagnostics-show-option -Wformat -Wformat-security
-
-
-ifeq ($(OS),Linux)
-	# We should always specify -Wl,--build-id, as documented at:
-	# http://linux.die.net/man/1/ld and http://fedoraproject.org/wiki/Releases/FeatureBuildId.http://fedoraproject.org/wiki/Releases/FeatureBuildId
-	LDFLAGS += -Wl,--build-id
-	# Set USE_VALVE_BINDIR to build with /Steam/tools/linux in the /valve/bin path.
-	#  Dedicated server uses this.
-	ifeq ($(USE_VALVE_BINDIR),1)
-		# dedicated server flags
-		ifeq ($(TARGET_PLATFORM),linux64)
-			VALVE_BINDIR = /valve/bin64/
-			MARCH_TARGET = nocona
-		else
-			VALVE_BINDIR = /valve/bin/
-			MARCH_TARGET = pentium4
-		endif
-		STRIP_FLAGS =
-	else
-		# linux desktop client flags
-		VALVE_BINDIR =
-		# If the steam-runtime is available, use it. We should just default to using it when
-		#  buildbot and everyone has a bit of time to get it installed.
-		ifneq "$(wildcard /valve/steam-runtime/bin/)" ""
-			# The steam-runtime is incompatible with clang at this point, so disable it
-			# if clang is enabled.
-			ifneq ($(CXX),clang++)
-				VALVE_BINDIR = /valve/steam-runtime/bin/
-			endif
-		endif
-		GCC_VER =
-		MARCH_TARGET = pentium4
-		# On dedicated servers, some plugins depend on global variable symbols in addition to functions.
-		# So symbols like _Z16ClearMultiDamagev should show up when you do "nm server_srv.so" in TF2.
-		STRIP_FLAGS = -x
-	endif
-
-	ifeq ($(CXX),clang++)
-		# Clang does not support -mfpmath=sse because it uses whatever
-		# instruction set extensions are available by default.
-		SSE_GEN_FLAGS = -msse2
-	else
-		SSE_GEN_FLAGS = -msse2 -mfpmath=sse
-	endif
-
-	CCACHE := $(SRCROOT)/devtools/bin/linux/ccache
-
-	ifeq ($(origin GCC_VER), undefined)
-	GCC_VER=-4.6
-	endif
-	ifeq ($(origin AR), default)
-		AR = $(VALVE_BINDIR)ar crs
-	endif
-	ifeq ($(origin CC),default)
-		CC = $(CCACHE) $(VALVE_BINDIR)gcc$(GCC_VER)	
-	endif
-	ifeq ($(origin CXX), default)
-		CXX = $(CCACHE) $(VALVE_BINDIR)g++$(GCC_VER)
-	endif
-	# Support ccache with clang. Add -Qunused-arguments to avoid excessive warnings due to
-	# a ccache quirk. Could also upgrade ccache.
-	# http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html
-	ifeq ($(CC),clang)
-		CC = $(CCACHE) $(VALVE_BINDIR)clang -Qunused-arguments
-	endif
-	ifeq ($(CXX),clang++)
-		CXX = $(CCACHE) $(VALVE_BINDIR)clang++ -Qunused-arguments
-	endif
-	LINK ?= $(CC)
-
-	ifeq ($(TARGET_PLATFORM),linux64)
-		# nocona = pentium4 + 64bit + MMX, SSE, SSE2, SSE3 - no SSSE3 (that's three s's - added in core2)
-		ARCH_FLAGS += -march=$(MARCH_TARGET) -mtune=core2
-		LD_SO = ld-linux-x86_64.so.2
-		LIBSTDCXX := $(shell $(CXX) -print-file-name=libstdc++.a)
-		LIBSTDCXXPIC := $(shell $(CXX) -print-file-name=libstdc++-pic.a)
-	else
-		# pentium4 = MMX, SSE, SSE2 - no SSE3 (added in prescott) # -msse3 -mfpmath=sse
-		ARCH_FLAGS += -m32 -march=$(MARCH_TARGET) -mtune=core2 $(SSE_GEN_FLAGS)
-		LD_SO = ld-linux.so.2
-		LIBSTDCXX := $(shell $(CXX) $(ARCH_FLAGS) -print-file-name=libstdc++.so)
-		LIBSTDCXXPIC := $(shell $(CXX) $(ARCH_FLAGS) -print-file-name=libstdc++.so)
-		LDFLAGS += -m32
-	endif
-
-	GEN_SYM ?= $(SRCROOT)/devtools/gendbg.sh
-	ifeq ($(CFG),release)
-		STRIP ?= strip $(STRIP_FLAGS) -S
-	#	CFLAGS += -ffunction-sections -fdata-sections
-	#	LDFLAGS += -Wl,--gc-sections -Wl,--print-gc-sections
-	else
-		STRIP ?= true
-	endif
-	VSIGN ?= true
-
-	ifeq ($(SOURCE_SDK), 1)
-		Srv_GAMEOUTPUTFILE := $(GAMEOUTPUTFILE:.so=_srv.so)
-		COPY_DLL_TO_SRV := 1
-	endif
-
-	LINK_MAP_FLAGS = -Wl,-Map,$(@:.so=).map
-
-	SHLIBLDFLAGS = -shared $(LDFLAGS) -Wl,--no-undefined
-
-	_WRAP := -Xlinker --wrap=
-	PATHWRAP = $(_WRAP)fopen $(_WRAP)freopen $(_WRAP)open    $(_WRAP)creat    $(_WRAP)access  $(_WRAP)__xstat \
-		   $(_WRAP)stat  $(_WRAP)lstat   $(_WRAP)fopen64 $(_WRAP)open64   $(_WRAP)opendir $(_WRAP)__lxstat \
-		   $(_WRAP)chmod $(_WRAP)chown   $(_WRAP)lchown  $(_WRAP)symlink  $(_WRAP)link    $(_WRAP)__lxstat64 \
-		   $(_WRAP)mknod $(_WRAP)utimes  $(_WRAP)unlink  $(_WRAP)rename   $(_WRAP)utime   $(_WRAP)__xstat64 \
-		   $(_WRAP)mount $(_WRAP)mkfifo  $(_WRAP)mkdir   $(_WRAP)rmdir    $(_WRAP)scandir $(_WRAP)realpath
-
-	LIB_START_EXE = $(PATHWRAP) -static-libgcc -Wl,--start-group
-	LIB_END_EXE = -Wl,--end-group -lm -ldl $(LIBSTDCXX) -lpthread 
-
-	LIB_START_SHLIB = $(PATHWRAP) -static-libgcc -Wl,--start-group
-	LIB_END_SHLIB = -Wl,--end-group -lm -ldl $(LIBSTDCXXPIC) -lpthread -l:$(LD_SO) -Wl,--version-script=$(SRCROOT)/devtools/version_script.linux.txt
-
-endif
-
-ifeq ($(OS),Darwin)
-	CCACHE := $(SRCROOT)/devtools/bin/osx32/ccache
-	MAC_SDK_VER ?= 10.6
-	MAC_SDK := macosx$(MAC_SDK_VER)
-	SYSROOT := $(shell xcodebuild -sdk $(MAC_SDK) -version Path)
-
-	ifneq ($(origin MAC_SDK_VER), file)
-            $(warning Attempting build with SDK version $(MAC_SDK_VER), only 10.6 is supported and recommended!)
-	endif
-
-	ifeq ($(SYSROOT),)
-		FIRSTSDK := $(firstword $(sort $(shell xcodebuild -showsdks | grep macosx | sed 's/.*macosx//')))
-                $(error Could not find SDK version $(MAC_SDK_VER). Install and configure Xcode 4.3, or build with: make MAC_SDK_VER=$(FIRSTSDK))
-	endif
-
-	ifeq ($(origin CC), default)
-                # Test to see if you have a compiler in the right place, if you
-                # don't abort with an error
-		CLANG := $(shell xcrun -sdk $(MAC_SDK) -find clang)
-		ifeq ($(wildcard $(CLANG)),)
-                        $(error Unable to find C compiler, install and configure Xcode 4.3)
-		endif
-
-		CC := $(CCACHE) $(CLANG) -Qunused-arguments
-	endif
-
-	ifeq ($(origin CXX), default)
-		CXXLANG := $(shell xcrun -sdk $(MAC_SDK) -find clang++)
-		ifeq ($(wildcard $(CXXLANG)),)
-                        $(error Unable to find C++ compiler, install and configure Xcode 4.3)
-		endif
-
-		CXX := $(CCACHE) $(CXXLANG) -Qunused-arguments
-	endif
-	LINK ?= $(CXX)
-
-	ifeq ($(origin AR), default)
-		AR := $(shell xcrun -sdk $(MAC_SDK) -find libtool) -static -o
-	endif
-
-	ifeq ($(TARGET_PLATFORM),osx64)
-		ARCH_FLAGS += -arch x86_64 -m64 -march=core2
-	else ifeq (,$(findstring -arch x86_64,$(GCC_ExtraCompilerFlags)))
-		ARCH_FLAGS += -arch i386 -m32 -march=prescott -momit-leaf-frame-pointer -mtune=core2
-	else
-		# dirty hack to build a universal binary - don't specify the architecture
-		ARCH_FLAGS += -arch i386 -Xarch_i386 -march=prescott -Xarch_i386 -mtune=core2 -Xarch_i386 -momit-leaf-frame-pointer -Xarch_x86_64 -march=core2
-	endif
-
-	GEN_SYM ?= $(shell xcrun -sdk $(MAC_SDK) -find dsymutil)
-	ifeq ($(CFG),release)
-		STRIP ?= strip -S
-	else
-		STRIP ?= true
-	endif
-	ifeq ($(SOURCE_SDK), 1)
-		VSIGN ?= true
-	else
-		VSIGN ?= $(SRCROOT)/devtools/bin/vsign
-	endif
-
-	CPPFLAGS += -I$(SYSROOT)/usr/include/malloc
-	CFLAGS += -isysroot $(SYSROOT) -mmacosx-version-min=10.5 -fasm-blocks
-
-	LIB_START_EXE = -lm -ldl -lpthread
-	LIB_END_EXE = 
-
-	LIB_START_SHLIB = 
-	LIB_END_SHLIB = 
-
-	SHLIBLDFLAGS = $(LDFLAGS) -bundle -flat_namespace -undefined suppress -Wl,-dead_strip -Wl,-no_dead_strip_inits_and_terms 
-
-	ifeq (lib,$(findstring lib,$(GAMEOUTPUTFILE)))
-		SHLIBLDFLAGS = $(LDFLAGS) -dynamiclib -current_version 1.0 -compatibility_version 1.0 -install_name @rpath/$(basename $(notdir $(GAMEOUTPUTFILE))).dylib $(SystemLibraries) -Wl,-dead_strip -Wl,-no_dead_strip_inits_and_terms 
-	endif
-
-endif
-
-#
-# Profile-directed optimizations.
-# Note: Last time these were tested 3/5/08, it actually slowed down the server benchmark by 5%!
-#
-# First, uncomment these, build, and test. It will generate .gcda and .gcno files where the .o files are.
-# PROFILE_LINKER_FLAG=-fprofile-arcs
-# PROFILE_COMPILER_FLAG=-fprofile-arcs
-#
-# Then, comment the above flags out again and rebuild with this flag uncommented:
-# PROFILE_COMPILER_FLAG=-fprofile-use
-#
-
-#############################################################################
-# The compiler command lne for each src code file to compile
-#############################################################################
-
-OBJ_DIR = ./obj_$(NAME)_$(TARGET_PLATFORM)$(TARGET_PLATFORM_EXT)/$(CFG)
-CPP_TO_OBJ = $(CPPFILES:.cpp=.o)
-CXX_TO_OBJ = $(CPP_TO_OBJ:.cxx=.o)
-CC_TO_OBJ = $(CXX_TO_OBJ:.cc=.o)
-MM_TO_OBJ = $(CC_TO_OBJ:.mm=.o)
-C_TO_OBJ = $(MM_TO_OBJ:.c=.o)
-OBJS = $(addprefix $(OBJ_DIR)/, $(notdir $(C_TO_OBJ)))
-
-ifeq ($(MAKE_VERBOSE),1)
-	QUIET_PREFIX = 
-	QUIET_ECHO_POSTFIX = 
-else
-	QUIET_PREFIX = @
-	QUIET_ECHO_POSTFIX = > /dev/null
-endif
-
-ifeq ($(MAKE_CC_VERBOSE),1)
-CC += -v
-endif
-
-ifeq ($(CONFTYPE),lib)
-  LIB_File = $(OUTPUTFILE)
-endif
-
-ifeq ($(CONFTYPE),dll)
-  SO_File = $(OUTPUTFILE)
-endif
-
-ifeq ($(CONFTYPE),exe)
-  EXE_File = $(OUTPUTFILE)
-endif
-
-# we generate dependencies as a side-effect of compilation now
-GEN_DEP_FILE=
-
-PRE_COMPILE_FILE = 
-
-POST_COMPILE_FILE = 
-
-ifeq ($(BUILDING_MULTI_ARCH),1)
-	SINGLE_ARCH_CXXFLAGS=$(subst -arch x86_64,,$(CXXFLAGS))
-	COMPILE_FILE = \
-		$(QUIET_PREFIX) \
-		echo "---- $(lastword $(subst /, ,$<)) as MULTIARCH----";\
-		mkdir -p $(OBJ_DIR) && \
-		$(CXX) $(SINGLE_ARCH_CXXFLAGS) $(GENDEP_CXXFLAGS) -o $@ -c $< && \
-		$(CXX) $(CXXFLAGS) -o $@ -c $<
-else
-	COMPILE_FILE = \
-		$(QUIET_PREFIX) \
-		echo "---- $(lastword $(subst /, ,$<)) ----";\
-		mkdir -p $(OBJ_DIR) && \
-		$(CXX) $(CXXFLAGS) $(GENDEP_CXXFLAGS) -o $@ -c $<
-endif
-
-ifneq "$(origin VALVE_NO_AUTO_P4)" "undefined"
-	P4_EDIT_START = chmod -R +w
-	P4_EDIT_END = || true
-	P4_REVERT_START = true
-	P4_REVERT_END =
-else
-	ifndef P4_EDIT_CHANGELIST
-		# You can use an environment variable to specify what changelist to check the Linux Binaries out into. Normally the default
-		# setting is best, but here is an alternate example:
-		# export P4_EDIT_CHANGELIST_CMD="echo 1424335"
-		# ?= means that if P4_EDIT_CHANGELIST_CMD is already set it won't be changed.
-		P4_EDIT_CHANGELIST_CMD ?= p4 changes -c `p4 client -o | grep ^Client | cut -f 2` -s pending | fgrep 'POSIX Auto Checkout' | cut -d' ' -f 2 | tail -n 1
-		P4_EDIT_CHANGELIST := $(shell $(P4_EDIT_CHANGELIST_CMD))
-	endif
-	ifeq ($(P4_EDIT_CHANGELIST),)
-		# If we haven't found a changelist to check out to then create one. The name must match the one from a few
-		# lines above or else a new changelist will be created each time.
-		# Warning: the behavior of 'echo' is not consistent. In bash you need the "-e" option in order for \n to be
-		# interpreted as a line-feed, but in dash you do not, and if "-e" is passed along then it is printed, which
-		# confuses p4. So, if you run this command from the bash shell don't forget to add "-e" to the echo command.
-		P4_EDIT_CHANGELIST = $(shell echo "Change: new\nDescription: POSIX Auto Checkout" | p4 change -i | cut -f 2 -d ' ')
-	endif
-
-	P4_EDIT_START := for f in
-	P4_EDIT_END := ; do if [ -n $$f ]; then if [ -d $$f ]; then find $$f -type f -print | p4 -x - edit -c $(P4_EDIT_CHANGELIST); else p4 edit -c $(P4_EDIT_CHANGELIST) $$f; fi; fi; done $(QUIET_ECHO_POSTFIX)
-	P4_REVERT_START := for f in  
-	P4_REVERT_END := ; do if [ -n $$f ]; then if [ -d $$f ]; then find $$f -type f -print | p4 -x - revert; else p4 revert $$f; fi; fi; done $(QUIET_ECHO_POSTFIX) 
-endif
-
-ifeq ($(CONFTYPE),dll)
-all: $(OTHER_DEPENDENCIES) $(OBJS) $(GAMEOUTPUTFILE)
-	@echo $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX)
-else
-all: $(OTHER_DEPENDENCIES) $(OBJS) $(OUTPUTFILE)
-	@echo $(OUTPUTFILE) $(QUIET_ECHO_POSTFIX)
-endif
-
-.PHONY: clean cleantargets cleanandremove rebuild relink RemoveOutputFile SingleFile
-
-
-rebuild :
-	$(MAKE) -f $(firstword $(MAKEFILE_LIST)) cleanandremove
-	$(MAKE) -f $(firstword $(MAKEFILE_LIST))
-
-
-# Use the relink target to force to relink the project.
-relink: RemoveOutputFile all
-
-RemoveOutputFile:
-	rm -f $(OUTPUTFILE)
-
-
-# This rule is so you can say "make SingleFile SingleFilename=/home/myname/valve_main/src/engine/language.cpp" and have it only build that file.
-# It basically just translates the full filename to create a dependency on the appropriate .o file so it'll build that.
-SingleFile : RemoveSingleFile $(OBJ_DIR)/$(basename $(notdir $(SingleFilename))).o
-	@echo ""
-
-RemoveSingleFile:
-	$(QUIET_PREFIX) rm -f $(OBJ_DIR)/$(basename $(notdir $(SingleFilename))).o
-
-clean:
-ifneq "$(OBJ_DIR)" ""
-	$(QUIET_PREFIX) echo "rm -rf $(OBJ_DIR)"
-	$(QUIET_PREFIX) rm -rf $(OBJ_DIR)
-endif
-ifneq "$(OUTPUTFILE)" ""
-	$(QUIET_PREFIX) if [ -e $(OUTPUTFILE) ]; then \
-		echo "p4 revert $(OUTPUTFILE)"; \
-		$(P4_REVERT_START) $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT) $(P4_REVERT_END); \
-	fi;
-endif
-ifneq "$(OTHER_DEPENDENCIES)" ""
-	$(QUIET_PREFIX) echo "rm -f $(OTHER_DEPENDENCIES)"
-	$(QUIET_PREFIX) rm -f $(OTHER_DEPENDENCIES)
-endif
-ifneq "$(GAMEOUTPUTFILE)" ""
-	$(QUIET_PREFIX) echo "p4 revert $(GAMEOUTPUTFILE)"
-	$(QUIET_PREFIX) $(P4_REVERT_START) $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_REVERT_END)
-endif
-
-
-# Do the above cleaning, except with p4 edit and rm. Reason being ar crs adds and replaces obj files to the
-# archive. However if you've renamed or deleted a source file, $(AR) won't remove it. This can leave
-# us with archive files that have extra unused symbols, and also potentially cause compilation errors
-# when you rename a file and have many duplicate symbols.
-cleanandremove:
-ifneq "$(OBJ_DIR)" ""
-	$(QUIET_PREFIX) echo "rm -rf $(OBJ_DIR)"
-	$(QUIET_PREFIX) -rm -rf $(OBJ_DIR)
-endif
-ifneq "$(OUTPUTFILE)" ""
-	$(QUIET_PREFIX) if [ -e $(OUTPUTFILE) ]; then \
-		echo "p4 edit and rm -f $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT)"; \
-		$(P4_EDIT_START) $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END); \
-	fi;
-	$(QUIET_PREFIX) -rm -f $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT);
-endif
-ifneq "$(OTHER_DEPENDENCIES)" ""
-	$(QUIET_PREFIX) echo "rm -f $(OTHER_DEPENDENCIES)"
-	$(QUIET_PREFIX) -rm -f $(OTHER_DEPENDENCIES)
-endif
-ifneq "$(GAMEOUTPUTFILE)" ""
-	$(QUIET_PREFIX) echo "p4 edit and rm -f $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT)"
-	$(QUIET_PREFIX) $(P4_EDIT_START) $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END)
-	$(QUIET_PREFIX) -rm -f $(GAMEOUTPUTFILE)
-endif
-
-
-# This just deletes the final targets so it'll do a relink next time we build.
-cleantargets:
-	$(QUIET_PREFIX) rm -f $(OUTPUTFILE) $(GAMEOUTPUTFILE)
-
-
-$(LIB_File): $(OTHER_DEPENDENCIES) $(OBJS) 
-	$(QUIET_PREFIX) -$(P4_EDIT_START) $(LIB_File) $(P4_EDIT_END); 
-	$(QUIET_PREFIX) $(AR) $(LIB_File) $(OBJS) $(LIBFILES);
-
-SO_GameOutputFile = $(GAMEOUTPUTFILE)
-
-# Remove the target before installing a file over it; this prevents existing
-# instances of the game from crashing due to the overwrite.
-$(SO_GameOutputFile): $(SO_File)
-	$(QUIET_PREFIX) \
-	$(P4_EDIT_START) $(GAMEOUTPUTFILE) $(P4_EDIT_END) && \
-	echo "----" $(QUIET_ECHO_POSTFIX);\
-	echo "---- COPYING TO $@ [$(CFG)] ----";\
-	echo "----" $(QUIET_ECHO_POSTFIX);
-	$(QUIET_PREFIX) -$(P4_EDIT_START) $(GAMEOUTPUTFILE) $(P4_EDIT_END);
-	$(QUIET_PREFIX) -mkdir -p `dirname $(GAMEOUTPUTFILE)` > /dev/null;
-	$(QUIET_PREFIX) rm -f $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);
-	$(QUIET_PREFIX) cp -v $(OUTPUTFILE) $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);
-	$(QUIET_PREFIX) -$(P4_EDIT_START) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END);
-	$(QUIET_PREFIX) $(GEN_SYM) $(GAMEOUTPUTFILE); 
-	$(QUIET_PREFIX) -$(STRIP) $(GAMEOUTPUTFILE);
-	$(QUIET_PREFIX) $(VSIGN) -signvalve $(GAMEOUTPUTFILE);
-	$(QUIET_PREFIX) if [ "$(COPY_DLL_TO_SRV)" = "1" ]; then\
-		echo "----" $(QUIET_ECHO_POSTFIX);\
-		echo "---- COPYING TO $(Srv_GAMEOUTPUTFILE) ----";\
-		echo "----" $(QUIET_ECHO_POSTFIX);\
-		cp -v $(GAMEOUTPUTFILE) $(Srv_GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);\
-		cp -v $(GAMEOUTPUTFILE)$(SYM_EXT) $(Srv_GAMEOUTPUTFILE)$(SYM_EXT) $(QUIET_ECHO_POSTFIX);\
-	fi;
-	$(QUIET_PREFIX) if [ "$(IMPORTLIBRARY)" != "" ]; then\
-		echo "----" $(QUIET_ECHO_POSTFIX);\
-		echo "---- COPYING TO IMPORT LIBRARY $(IMPORTLIBRARY) ----";\
-		echo "----" $(QUIET_ECHO_POSTFIX);\
-		$(P4_EDIT_START) $(IMPORTLIBRARY) $(P4_EDIT_END) && \
-		mkdir -p `dirname $(IMPORTLIBRARY)` > /dev/null && \
-		cp -v $(OUTPUTFILE) $(IMPORTLIBRARY); \
-	fi;
-
-
-$(SO_File): $(OTHER_DEPENDENCIES) $(OBJS) $(LIBFILENAMES)
-	$(QUIET_PREFIX) \
-	echo "----" $(QUIET_ECHO_POSTFIX);\
-	echo "---- LINKING $@ [$(CFG)] ----";\
-	echo "----" $(QUIET_ECHO_POSTFIX);\
-	\
-	$(LINK) $(LINK_MAP_FLAGS) $(SHLIBLDFLAGS) $(PROFILE_LINKER_FLAG) -o $(OUTPUTFILE) $(LIB_START_SHLIB) $(OBJS) $(LIBFILES) $(SystemLibraries) $(LIB_END_SHLIB);
-	$(VSIGN) -signvalve $(OUTPUTFILE);
-
-
-$(EXE_File) : $(OTHER_DEPENDENCIES) $(OBJS) $(LIBFILENAMES)
-	$(QUIET_PREFIX) \
-	echo "----" $(QUIET_ECHO_POSTFIX);\
-	echo "---- LINKING EXE $@ [$(CFG)] ----";\
-	echo "----" $(QUIET_ECHO_POSTFIX);\
-	\
-	$(P4_EDIT_START) $(OUTPUTFILE) $(P4_EDIT_END);\
-	$(LINK) $(LINK_MAP_FLAGS) $(LDFLAGS) $(PROFILE_LINKER_FLAG) -o $(OUTPUTFILE) $(LIB_START_EXE) $(OBJS) $(LIBFILES) $(SystemLibraries) $(LIB_END_EXE);
-	$(QUIET_PREFIX) -$(P4_EDIT_START) $(OUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END);
-	$(QUIET_PREFIX) $(GEN_SYM) $(OUTPUTFILE);
-	$(QUIET_PREFIX) -$(STRIP) $(OUTPUTFILE);
-	$(QUIET_PREFIX) $(VSIGN) -signvalve $(OUTPUTFILE);
-
-
-tags:
-	etags -a -C -o $(SRCROOT)/TAGS *.cpp *.cxx *.h *.hxx
+SRCROOT?=..
+
+THISFILE:=$(SRCROOT)/devtools/makefile_base_posix.mak
+MAKEFILE_BASE:=$(notdir $(THISFILE))
+MAKEFILE_LINK:=$(THISFILE).link
+
+-include $(MAKEFILE_LINK)
+
+$(MAKEFILE_LINK): $(shell which $(CC)) $(THISFILE)
+	if [ "$(shell printf "$(shell $(CC) -dumpversion)\n8" | sort -Vr | head -1)" = 8 ]; then \
+		ln -sf $(MAKEFILE_BASE).default $@ ;\
+	else \
+		ln -sf $(MAKEFILE_BASE).gcc8 $@ ;\
+	fi
diff --git a/sp/src/devtools/makefile_base_posix.mak.default b/sp/src/devtools/makefile_base_posix.mak.default
new file mode 100644
index 00000000..d86efb38
--- /dev/null
+++ b/sp/src/devtools/makefile_base_posix.mak.default
@@ -0,0 +1,509 @@
+#
+# Base makefile for Linux and OSX
+#
+# !!!!! Note to future editors !!!!!
+# 
+# before you make changes, make sure you grok:
+# 1. the difference between =, :=, +=, and ?= 
+# 2. how and when this base makefile gets included in the generated makefile(s)
+#  ( see http://www.gnu.org/software/make/manual/make.html#Flavors )
+#
+# Command line prefixes:
+#  -	errors are ignored
+#  @	command is not printed to stdout before being executed
+#  +	command is executed even if Make is invoked in "do not exec" mode
+
+OS := $(shell uname)
+HOSTNAME := $(shell hostname)
+
+-include $(SRCROOT)/devtools/steam_def.mak
+-include $(SRCROOT)/devtools/sourcesdk_def.mak
+
+# To build with clang, set the following in your environment:
+#   CC = clang
+#   CXX = clang++
+
+ifeq ($(CFG), release)
+	# With gcc 4.6.3, engine.so went from 7,383,765 to 8,429,109 when building with -O3.
+	#  There also was no speed difference running at 1280x1024. May 2012, mikesart.
+	#  tonyp: The size increase was likely caused by -finline-functions and -fipa-cp-clone getting switched on with -O3.
+	# -fno-omit-frame-pointer: need this for stack traces with perf.
+	OptimizerLevel_CompilerSpecific = -O2 -fno-strict-aliasing -ffast-math -fno-omit-frame-pointer -ftree-vectorize -fpredictive-commoning -funswitch-loops
+else
+	OptimizerLevel_CompilerSpecific = -O0
+	#-O1 -finline-functions
+endif
+
+# CPPFLAGS == "c/c++ *preprocessor* flags" - not "cee-plus-plus flags"
+ARCH_FLAGS = 
+BUILDING_MULTI_ARCH = 0
+CPPFLAGS = $(DEFINES) $(addprefix -I, $(abspath $(INCLUDEDIRS) ))
+CFLAGS = $(ARCH_FLAGS) $(CPPFLAGS) $(WARN_FLAGS) -fvisibility=$(SymbolVisibility) $(OptimizerLevel) -pipe $(GCC_ExtraCompilerFlags) -Usprintf -Ustrncpy -UPROTECTED_THINGS_ENABLE
+# In -std=gnu++0x mode we get lots of errors about "error: narrowing conversion". -fpermissive
+# turns these into warnings in gcc, and -Wno-c++11-narrowing suppresses them entirely in clang 3.1+.
+ifeq ($(CXX),clang++)
+	CXXFLAGS = $(CFLAGS) -std=gnu++0x -Wno-c++11-narrowing -Wno-dangling-else
+else
+	CXXFLAGS = $(CFLAGS) -std=gnu++0x -fpermissive
+endif
+DEFINES += -DVPROF_LEVEL=1 -DGNUC -DNO_HOOK_MALLOC -DNO_MALLOC_OVERRIDE
+LDFLAGS = $(CFLAGS) $(GCC_ExtraLinkerFlags) $(OptimizerLevel)
+GENDEP_CXXFLAGS = -MD -MP -MF $(@:.o=.P) 
+MAP_FLAGS =
+Srv_GAMEOUTPUTFILE = 
+COPY_DLL_TO_SRV = 0
+
+
+ifeq ($(STEAM_BRANCH),1)
+	WARN_FLAGS = -Wall -Wextra -Wshadow -Wno-invalid-offsetof
+else
+	WARN_FLAGS = -Wno-write-strings -Wno-multichar
+endif
+
+WARN_FLAGS += -Wno-unknown-pragmas -Wno-unused-parameter -Wno-unused-value -Wno-missing-field-initializers -Wno-sign-compare -Wno-reorder -Wno-invalid-offsetof -Wno-float-equal -Werror=return-type -fdiagnostics-show-option -Wformat -Wformat-security
+
+
+ifeq ($(OS),Linux)
+	# We should always specify -Wl,--build-id, as documented at:
+	# http://linux.die.net/man/1/ld and http://fedoraproject.org/wiki/Releases/FeatureBuildId.http://fedoraproject.org/wiki/Releases/FeatureBuildId
+	LDFLAGS += -Wl,--build-id
+	# Set USE_VALVE_BINDIR to build with /Steam/tools/linux in the /valve/bin path.
+	#  Dedicated server uses this.
+	ifeq ($(USE_VALVE_BINDIR),1)
+		# dedicated server flags
+		ifeq ($(TARGET_PLATFORM),linux64)
+			VALVE_BINDIR = /valve/bin64/
+			MARCH_TARGET = nocona
+		else
+			VALVE_BINDIR = /valve/bin/
+			MARCH_TARGET = pentium4
+		endif
+		STRIP_FLAGS =
+	else
+		# linux desktop client flags
+		VALVE_BINDIR =
+		# If the steam-runtime is available, use it. We should just default to using it when
+		#  buildbot and everyone has a bit of time to get it installed.
+		ifneq "$(wildcard /valve/steam-runtime/bin/)" ""
+			# The steam-runtime is incompatible with clang at this point, so disable it
+			# if clang is enabled.
+			ifneq ($(CXX),clang++)
+				VALVE_BINDIR = /valve/steam-runtime/bin/
+			endif
+		endif
+		GCC_VER =
+		MARCH_TARGET = pentium4
+		# On dedicated servers, some plugins depend on global variable symbols in addition to functions.
+		# So symbols like _Z16ClearMultiDamagev should show up when you do "nm server_srv.so" in TF2.
+		STRIP_FLAGS = -x
+	endif
+
+	ifeq ($(CXX),clang++)
+		# Clang does not support -mfpmath=sse because it uses whatever
+		# instruction set extensions are available by default.
+		SSE_GEN_FLAGS = -msse2
+	else
+		SSE_GEN_FLAGS = -msse2 -mfpmath=sse
+	endif
+
+	CCACHE := $(SRCROOT)/devtools/bin/linux/ccache
+
+	ifeq ($(origin GCC_VER), undefined)
+	GCC_VER=-4.6
+	endif
+	ifeq ($(origin AR), default)
+		AR = $(VALVE_BINDIR)ar crs
+	endif
+	ifeq ($(origin CC),default)
+		CC = $(CCACHE) $(VALVE_BINDIR)gcc$(GCC_VER)	
+	endif
+	ifeq ($(origin CXX), default)
+		CXX = $(CCACHE) $(VALVE_BINDIR)g++$(GCC_VER)
+	endif
+	# Support ccache with clang. Add -Qunused-arguments to avoid excessive warnings due to
+	# a ccache quirk. Could also upgrade ccache.
+	# http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html
+	ifeq ($(CC),clang)
+		CC = $(CCACHE) $(VALVE_BINDIR)clang -Qunused-arguments
+	endif
+	ifeq ($(CXX),clang++)
+		CXX = $(CCACHE) $(VALVE_BINDIR)clang++ -Qunused-arguments
+	endif
+	LINK ?= $(CC)
+
+	ifeq ($(TARGET_PLATFORM),linux64)
+		# nocona = pentium4 + 64bit + MMX, SSE, SSE2, SSE3 - no SSSE3 (that's three s's - added in core2)
+		ARCH_FLAGS += -march=$(MARCH_TARGET) -mtune=core2
+		LD_SO = ld-linux-x86_64.so.2
+		LIBSTDCXX := $(shell $(CXX) -print-file-name=libstdc++.a)
+		LIBSTDCXXPIC := $(shell $(CXX) -print-file-name=libstdc++-pic.a)
+	else
+		# pentium4 = MMX, SSE, SSE2 - no SSE3 (added in prescott) # -msse3 -mfpmath=sse
+		ARCH_FLAGS += -m32 -march=$(MARCH_TARGET) -mtune=core2 $(SSE_GEN_FLAGS)
+		LD_SO = ld-linux.so.2
+		LIBSTDCXX := $(shell $(CXX) $(ARCH_FLAGS) -print-file-name=libstdc++.so)
+		LIBSTDCXXPIC := $(shell $(CXX) $(ARCH_FLAGS) -print-file-name=libstdc++.so)
+		LDFLAGS += -m32
+	endif
+
+	GEN_SYM ?= $(SRCROOT)/devtools/gendbg.sh
+	ifeq ($(CFG),release)
+		STRIP ?= strip $(STRIP_FLAGS) -S
+	#	CFLAGS += -ffunction-sections -fdata-sections
+	#	LDFLAGS += -Wl,--gc-sections -Wl,--print-gc-sections
+	else
+		STRIP ?= true
+	endif
+	VSIGN ?= true
+
+	ifeq ($(SOURCE_SDK), 1)
+		Srv_GAMEOUTPUTFILE := $(GAMEOUTPUTFILE:.so=_srv.so)
+		COPY_DLL_TO_SRV := 1
+	endif
+
+	LINK_MAP_FLAGS = -Wl,-Map,$(@:.so=).map
+
+	SHLIBLDFLAGS = -shared $(LDFLAGS) -Wl,--no-undefined
+
+	_WRAP := -Xlinker --wrap=
+	PATHWRAP = $(_WRAP)fopen $(_WRAP)freopen $(_WRAP)open    $(_WRAP)creat    $(_WRAP)access  $(_WRAP)__xstat \
+		   $(_WRAP)stat  $(_WRAP)lstat   $(_WRAP)fopen64 $(_WRAP)open64   $(_WRAP)opendir $(_WRAP)__lxstat \
+		   $(_WRAP)chmod $(_WRAP)chown   $(_WRAP)lchown  $(_WRAP)symlink  $(_WRAP)link    $(_WRAP)__lxstat64 \
+		   $(_WRAP)mknod $(_WRAP)utimes  $(_WRAP)unlink  $(_WRAP)rename   $(_WRAP)utime   $(_WRAP)__xstat64 \
+		   $(_WRAP)mount $(_WRAP)mkfifo  $(_WRAP)mkdir   $(_WRAP)rmdir    $(_WRAP)scandir $(_WRAP)realpath
+
+	LIB_START_EXE = $(PATHWRAP) -static-libgcc -Wl,--start-group
+	LIB_END_EXE = -Wl,--end-group -lm -ldl $(LIBSTDCXX) -lpthread 
+
+	LIB_START_SHLIB = $(PATHWRAP) -static-libgcc -Wl,--start-group
+	LIB_END_SHLIB = -Wl,--end-group -lm -ldl $(LIBSTDCXXPIC) -lpthread -l:$(LD_SO) -Wl,--version-script=$(SRCROOT)/devtools/version_script.linux.txt
+
+endif
+
+ifeq ($(OS),Darwin)
+	CCACHE := $(SRCROOT)/devtools/bin/osx32/ccache
+	MAC_SDK_VER ?= 10.6
+	MAC_SDK := macosx$(MAC_SDK_VER)
+	SYSROOT := $(shell xcodebuild -sdk $(MAC_SDK) -version Path)
+
+	ifneq ($(origin MAC_SDK_VER), file)
+            $(warning Attempting build with SDK version $(MAC_SDK_VER), only 10.6 is supported and recommended!)
+	endif
+
+	ifeq ($(SYSROOT),)
+		FIRSTSDK := $(firstword $(sort $(shell xcodebuild -showsdks | grep macosx | sed 's/.*macosx//')))
+                $(error Could not find SDK version $(MAC_SDK_VER). Install and configure Xcode 4.3, or build with: make MAC_SDK_VER=$(FIRSTSDK))
+	endif
+
+	ifeq ($(origin CC), default)
+                # Test to see if you have a compiler in the right place, if you
+                # don't abort with an error
+		CLANG := $(shell xcrun -sdk $(MAC_SDK) -find clang)
+		ifeq ($(wildcard $(CLANG)),)
+                        $(error Unable to find C compiler, install and configure Xcode 4.3)
+		endif
+
+		CC := $(CCACHE) $(CLANG) -Qunused-arguments
+	endif
+
+	ifeq ($(origin CXX), default)
+		CXXLANG := $(shell xcrun -sdk $(MAC_SDK) -find clang++)
+		ifeq ($(wildcard $(CXXLANG)),)
+                        $(error Unable to find C++ compiler, install and configure Xcode 4.3)
+		endif
+
+		CXX := $(CCACHE) $(CXXLANG) -Qunused-arguments
+	endif
+	LINK ?= $(CXX)
+
+	ifeq ($(origin AR), default)
+		AR := $(shell xcrun -sdk $(MAC_SDK) -find libtool) -static -o
+	endif
+
+	ifeq ($(TARGET_PLATFORM),osx64)
+		ARCH_FLAGS += -arch x86_64 -m64 -march=core2
+	else ifeq (,$(findstring -arch x86_64,$(GCC_ExtraCompilerFlags)))
+		ARCH_FLAGS += -arch i386 -m32 -march=prescott -momit-leaf-frame-pointer -mtune=core2
+	else
+		# dirty hack to build a universal binary - don't specify the architecture
+		ARCH_FLAGS += -arch i386 -Xarch_i386 -march=prescott -Xarch_i386 -mtune=core2 -Xarch_i386 -momit-leaf-frame-pointer -Xarch_x86_64 -march=core2
+	endif
+
+	GEN_SYM ?= $(shell xcrun -sdk $(MAC_SDK) -find dsymutil)
+	ifeq ($(CFG),release)
+		STRIP ?= strip -S
+	else
+		STRIP ?= true
+	endif
+	ifeq ($(SOURCE_SDK), 1)
+		VSIGN ?= true
+	else
+		VSIGN ?= $(SRCROOT)/devtools/bin/vsign
+	endif
+
+	CPPFLAGS += -I$(SYSROOT)/usr/include/malloc
+	CFLAGS += -isysroot $(SYSROOT) -mmacosx-version-min=10.5 -fasm-blocks
+
+	LIB_START_EXE = -lm -ldl -lpthread
+	LIB_END_EXE = 
+
+	LIB_START_SHLIB = 
+	LIB_END_SHLIB = 
+
+	SHLIBLDFLAGS = $(LDFLAGS) -bundle -flat_namespace -undefined suppress -Wl,-dead_strip -Wl,-no_dead_strip_inits_and_terms 
+
+	ifeq (lib,$(findstring lib,$(GAMEOUTPUTFILE)))
+		SHLIBLDFLAGS = $(LDFLAGS) -dynamiclib -current_version 1.0 -compatibility_version 1.0 -install_name @rpath/$(basename $(notdir $(GAMEOUTPUTFILE))).dylib $(SystemLibraries) -Wl,-dead_strip -Wl,-no_dead_strip_inits_and_terms 
+	endif
+
+endif
+
+#
+# Profile-directed optimizations.
+# Note: Last time these were tested 3/5/08, it actually slowed down the server benchmark by 5%!
+#
+# First, uncomment these, build, and test. It will generate .gcda and .gcno files where the .o files are.
+# PROFILE_LINKER_FLAG=-fprofile-arcs
+# PROFILE_COMPILER_FLAG=-fprofile-arcs
+#
+# Then, comment the above flags out again and rebuild with this flag uncommented:
+# PROFILE_COMPILER_FLAG=-fprofile-use
+#
+
+#############################################################################
+# The compiler command lne for each src code file to compile
+#############################################################################
+
+OBJ_DIR = ./obj_$(NAME)_$(TARGET_PLATFORM)$(TARGET_PLATFORM_EXT)/$(CFG)
+CPP_TO_OBJ = $(CPPFILES:.cpp=.o)
+CXX_TO_OBJ = $(CPP_TO_OBJ:.cxx=.o)
+CC_TO_OBJ = $(CXX_TO_OBJ:.cc=.o)
+MM_TO_OBJ = $(CC_TO_OBJ:.mm=.o)
+C_TO_OBJ = $(MM_TO_OBJ:.c=.o)
+OBJS = $(addprefix $(OBJ_DIR)/, $(notdir $(C_TO_OBJ)))
+
+ifeq ($(MAKE_VERBOSE),1)
+	QUIET_PREFIX = 
+	QUIET_ECHO_POSTFIX = 
+else
+	QUIET_PREFIX = @
+	QUIET_ECHO_POSTFIX = > /dev/null
+endif
+
+ifeq ($(MAKE_CC_VERBOSE),1)
+CC += -v
+endif
+
+ifeq ($(CONFTYPE),lib)
+  LIB_File = $(OUTPUTFILE)
+endif
+
+ifeq ($(CONFTYPE),dll)
+  SO_File = $(OUTPUTFILE)
+endif
+
+ifeq ($(CONFTYPE),exe)
+  EXE_File = $(OUTPUTFILE)
+endif
+
+# we generate dependencies as a side-effect of compilation now
+GEN_DEP_FILE=
+
+PRE_COMPILE_FILE = 
+
+POST_COMPILE_FILE = 
+
+ifeq ($(BUILDING_MULTI_ARCH),1)
+	SINGLE_ARCH_CXXFLAGS=$(subst -arch x86_64,,$(CXXFLAGS))
+	COMPILE_FILE = \
+		$(QUIET_PREFIX) \
+		echo "---- $(lastword $(subst /, ,$<)) as MULTIARCH----";\
+		mkdir -p $(OBJ_DIR) && \
+		$(CXX) $(SINGLE_ARCH_CXXFLAGS) $(GENDEP_CXXFLAGS) -o $@ -c $< && \
+		$(CXX) $(CXXFLAGS) -o $@ -c $<
+else
+	COMPILE_FILE = \
+		$(QUIET_PREFIX) \
+		echo "---- $(lastword $(subst /, ,$<)) ----";\
+		mkdir -p $(OBJ_DIR) && \
+		$(CXX) $(CXXFLAGS) $(GENDEP_CXXFLAGS) -o $@ -c $<
+endif
+
+ifneq "$(origin VALVE_NO_AUTO_P4)" "undefined"
+	P4_EDIT_START = chmod -R +w
+	P4_EDIT_END = || true
+	P4_REVERT_START = true
+	P4_REVERT_END =
+else
+	ifndef P4_EDIT_CHANGELIST
+		# You can use an environment variable to specify what changelist to check the Linux Binaries out into. Normally the default
+		# setting is best, but here is an alternate example:
+		# export P4_EDIT_CHANGELIST_CMD="echo 1424335"
+		# ?= means that if P4_EDIT_CHANGELIST_CMD is already set it won't be changed.
+		P4_EDIT_CHANGELIST_CMD ?= p4 changes -c `p4 client -o | grep ^Client | cut -f 2` -s pending | fgrep 'POSIX Auto Checkout' | cut -d' ' -f 2 | tail -n 1
+		P4_EDIT_CHANGELIST := $(shell $(P4_EDIT_CHANGELIST_CMD))
+	endif
+	ifeq ($(P4_EDIT_CHANGELIST),)
+		# If we haven't found a changelist to check out to then create one. The name must match the one from a few
+		# lines above or else a new changelist will be created each time.
+		# Warning: the behavior of 'echo' is not consistent. In bash you need the "-e" option in order for \n to be
+		# interpreted as a line-feed, but in dash you do not, and if "-e" is passed along then it is printed, which
+		# confuses p4. So, if you run this command from the bash shell don't forget to add "-e" to the echo command.
+		P4_EDIT_CHANGELIST = $(shell echo "Change: new\nDescription: POSIX Auto Checkout" | p4 change -i | cut -f 2 -d ' ')
+	endif
+
+	P4_EDIT_START := for f in
+	P4_EDIT_END := ; do if [ -n $$f ]; then if [ -d $$f ]; then find $$f -type f -print | p4 -x - edit -c $(P4_EDIT_CHANGELIST); else p4 edit -c $(P4_EDIT_CHANGELIST) $$f; fi; fi; done $(QUIET_ECHO_POSTFIX)
+	P4_REVERT_START := for f in  
+	P4_REVERT_END := ; do if [ -n $$f ]; then if [ -d $$f ]; then find $$f -type f -print | p4 -x - revert; else p4 revert $$f; fi; fi; done $(QUIET_ECHO_POSTFIX) 
+endif
+
+ifeq ($(CONFTYPE),dll)
+all: $(OTHER_DEPENDENCIES) $(OBJS) $(GAMEOUTPUTFILE)
+	@echo $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX)
+else
+all: $(OTHER_DEPENDENCIES) $(OBJS) $(OUTPUTFILE)
+	@echo $(OUTPUTFILE) $(QUIET_ECHO_POSTFIX)
+endif
+
+.PHONY: clean cleantargets cleanandremove rebuild relink RemoveOutputFile SingleFile
+
+
+rebuild :
+	$(MAKE) -f $(firstword $(MAKEFILE_LIST)) cleanandremove
+	$(MAKE) -f $(firstword $(MAKEFILE_LIST))
+
+
+# Use the relink target to force to relink the project.
+relink: RemoveOutputFile all
+
+RemoveOutputFile:
+	rm -f $(OUTPUTFILE)
+
+
+# This rule is so you can say "make SingleFile SingleFilename=/home/myname/valve_main/src/engine/language.cpp" and have it only build that file.
+# It basically just translates the full filename to create a dependency on the appropriate .o file so it'll build that.
+SingleFile : RemoveSingleFile $(OBJ_DIR)/$(basename $(notdir $(SingleFilename))).o
+	@echo ""
+
+RemoveSingleFile:
+	$(QUIET_PREFIX) rm -f $(OBJ_DIR)/$(basename $(notdir $(SingleFilename))).o
+
+clean:
+ifneq "$(OBJ_DIR)" ""
+	$(QUIET_PREFIX) echo "rm -rf $(OBJ_DIR)"
+	$(QUIET_PREFIX) rm -rf $(OBJ_DIR)
+endif
+ifneq "$(OUTPUTFILE)" ""
+	$(QUIET_PREFIX) if [ -e $(OUTPUTFILE) ]; then \
+		echo "p4 revert $(OUTPUTFILE)"; \
+		$(P4_REVERT_START) $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT) $(P4_REVERT_END); \
+	fi;
+endif
+ifneq "$(OTHER_DEPENDENCIES)" ""
+	$(QUIET_PREFIX) echo "rm -f $(OTHER_DEPENDENCIES)"
+	$(QUIET_PREFIX) rm -f $(OTHER_DEPENDENCIES)
+endif
+ifneq "$(GAMEOUTPUTFILE)" ""
+	$(QUIET_PREFIX) echo "p4 revert $(GAMEOUTPUTFILE)"
+	$(QUIET_PREFIX) $(P4_REVERT_START) $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_REVERT_END)
+endif
+
+
+# Do the above cleaning, except with p4 edit and rm. Reason being ar crs adds and replaces obj files to the
+# archive. However if you've renamed or deleted a source file, $(AR) won't remove it. This can leave
+# us with archive files that have extra unused symbols, and also potentially cause compilation errors
+# when you rename a file and have many duplicate symbols.
+cleanandremove:
+ifneq "$(OBJ_DIR)" ""
+	$(QUIET_PREFIX) echo "rm -rf $(OBJ_DIR)"
+	$(QUIET_PREFIX) -rm -rf $(OBJ_DIR)
+endif
+ifneq "$(OUTPUTFILE)" ""
+	$(QUIET_PREFIX) if [ -e $(OUTPUTFILE) ]; then \
+		echo "p4 edit and rm -f $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT)"; \
+		$(P4_EDIT_START) $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END); \
+	fi;
+	$(QUIET_PREFIX) -rm -f $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT);
+endif
+ifneq "$(OTHER_DEPENDENCIES)" ""
+	$(QUIET_PREFIX) echo "rm -f $(OTHER_DEPENDENCIES)"
+	$(QUIET_PREFIX) -rm -f $(OTHER_DEPENDENCIES)
+endif
+ifneq "$(GAMEOUTPUTFILE)" ""
+	$(QUIET_PREFIX) echo "p4 edit and rm -f $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT)"
+	$(QUIET_PREFIX) $(P4_EDIT_START) $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END)
+	$(QUIET_PREFIX) -rm -f $(GAMEOUTPUTFILE)
+endif
+
+
+# This just deletes the final targets so it'll do a relink next time we build.
+cleantargets:
+	$(QUIET_PREFIX) rm -f $(OUTPUTFILE) $(GAMEOUTPUTFILE)
+
+
+$(LIB_File): $(OTHER_DEPENDENCIES) $(OBJS) 
+	$(QUIET_PREFIX) -$(P4_EDIT_START) $(LIB_File) $(P4_EDIT_END); 
+	$(QUIET_PREFIX) $(AR) $(LIB_File) $(OBJS) $(LIBFILES);
+
+SO_GameOutputFile = $(GAMEOUTPUTFILE)
+
+# Remove the target before installing a file over it; this prevents existing
+# instances of the game from crashing due to the overwrite.
+$(SO_GameOutputFile): $(SO_File)
+	$(QUIET_PREFIX) \
+	$(P4_EDIT_START) $(GAMEOUTPUTFILE) $(P4_EDIT_END) && \
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	echo "---- COPYING TO $@ [$(CFG)] ----";\
+	echo "----" $(QUIET_ECHO_POSTFIX);
+	$(QUIET_PREFIX) -$(P4_EDIT_START) $(GAMEOUTPUTFILE) $(P4_EDIT_END);
+	$(QUIET_PREFIX) -mkdir -p `dirname $(GAMEOUTPUTFILE)` > /dev/null;
+	$(QUIET_PREFIX) rm -f $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);
+	$(QUIET_PREFIX) cp -v $(OUTPUTFILE) $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);
+	$(QUIET_PREFIX) -$(P4_EDIT_START) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END);
+	$(QUIET_PREFIX) $(GEN_SYM) $(GAMEOUTPUTFILE); 
+	$(QUIET_PREFIX) -$(STRIP) $(GAMEOUTPUTFILE);
+	$(QUIET_PREFIX) $(VSIGN) -signvalve $(GAMEOUTPUTFILE);
+	$(QUIET_PREFIX) if [ "$(COPY_DLL_TO_SRV)" = "1" ]; then\
+		echo "----" $(QUIET_ECHO_POSTFIX);\
+		echo "---- COPYING TO $(Srv_GAMEOUTPUTFILE) ----";\
+		echo "----" $(QUIET_ECHO_POSTFIX);\
+		cp -v $(GAMEOUTPUTFILE) $(Srv_GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);\
+		cp -v $(GAMEOUTPUTFILE)$(SYM_EXT) $(Srv_GAMEOUTPUTFILE)$(SYM_EXT) $(QUIET_ECHO_POSTFIX);\
+	fi;
+	$(QUIET_PREFIX) if [ "$(IMPORTLIBRARY)" != "" ]; then\
+		echo "----" $(QUIET_ECHO_POSTFIX);\
+		echo "---- COPYING TO IMPORT LIBRARY $(IMPORTLIBRARY) ----";\
+		echo "----" $(QUIET_ECHO_POSTFIX);\
+		$(P4_EDIT_START) $(IMPORTLIBRARY) $(P4_EDIT_END) && \
+		mkdir -p `dirname $(IMPORTLIBRARY)` > /dev/null && \
+		cp -v $(OUTPUTFILE) $(IMPORTLIBRARY); \
+	fi;
+
+
+$(SO_File): $(OTHER_DEPENDENCIES) $(OBJS) $(LIBFILENAMES)
+	$(QUIET_PREFIX) \
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	echo "---- LINKING $@ [$(CFG)] ----";\
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	\
+	$(LINK) $(LINK_MAP_FLAGS) $(SHLIBLDFLAGS) $(PROFILE_LINKER_FLAG) -o $(OUTPUTFILE) $(LIB_START_SHLIB) $(OBJS) $(LIBFILES) $(SystemLibraries) $(LIB_END_SHLIB);
+	$(VSIGN) -signvalve $(OUTPUTFILE);
+
+
+$(EXE_File) : $(OTHER_DEPENDENCIES) $(OBJS) $(LIBFILENAMES)
+	$(QUIET_PREFIX) \
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	echo "---- LINKING EXE $@ [$(CFG)] ----";\
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	\
+	$(P4_EDIT_START) $(OUTPUTFILE) $(P4_EDIT_END);\
+	$(LINK) $(LINK_MAP_FLAGS) $(LDFLAGS) $(PROFILE_LINKER_FLAG) -o $(OUTPUTFILE) $(LIB_START_EXE) $(OBJS) $(LIBFILES) $(SystemLibraries) $(LIB_END_EXE);
+	$(QUIET_PREFIX) -$(P4_EDIT_START) $(OUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END);
+	$(QUIET_PREFIX) $(GEN_SYM) $(OUTPUTFILE);
+	$(QUIET_PREFIX) -$(STRIP) $(OUTPUTFILE);
+	$(QUIET_PREFIX) $(VSIGN) -signvalve $(OUTPUTFILE);
+
+
+tags:
+	etags -a -C -o $(SRCROOT)/TAGS *.cpp *.cxx *.h *.hxx
diff --git a/sp/src/devtools/makefile_base_posix.mak.gcc8 b/sp/src/devtools/makefile_base_posix.mak.gcc8
new file mode 100644
index 00000000..90bd818e
--- /dev/null
+++ b/sp/src/devtools/makefile_base_posix.mak.gcc8
@@ -0,0 +1,507 @@
+#
+# Base makefile for Linux and OSX
+#
+# !!!!! Note to future editors !!!!!
+# 
+# before you make changes, make sure you grok:
+# 1. the difference between =, :=, +=, and ?= 
+# 2. how and when this base makefile gets included in the generated makefile(s)
+#  ( see http://www.gnu.org/software/make/manual/make.html#Flavors )
+#
+# Command line prefixes:
+#  -	errors are ignored
+#  @	command is not printed to stdout before being executed
+#  +	command is executed even if Make is invoked in "do not exec" mode
+
+OS := $(shell uname)
+HOSTNAME := $(shell hostname)
+
+-include $(SRCROOT)/devtools/steam_def.mak
+-include $(SRCROOT)/devtools/sourcesdk_def.mak
+
+# To build with clang, set the following in your environment:
+#   CC = clang
+#   CXX = clang++
+
+ifeq ($(CFG), release)
+	# With gcc 4.6.3, engine.so went from 7,383,765 to 8,429,109 when building with -O3.
+	#  There also was no speed difference running at 1280x1024. May 2012, mikesart.
+	#  tonyp: The size increase was likely caused by -finline-functions and -fipa-cp-clone getting switched on with -O3.
+	# -fno-omit-frame-pointer: need this for stack traces with perf.
+	OptimizerLevel_CompilerSpecific = -O2 -fno-strict-aliasing -ffast-math -fno-omit-frame-pointer -ftree-vectorize -fpredictive-commoning -funswitch-loops
+else
+	OptimizerLevel_CompilerSpecific = -Og
+	#-O1 -finline-functions
+endif
+
+# CPPFLAGS == "c/c++ *preprocessor* flags" - not "cee-plus-plus flags"
+ARCH_FLAGS = -fabi-compat-version=2 -fabi-version=2 -fpic -fno-plt  -fcf-protection=none -fno-stack-protector -fno-stack-clash-protection
+BUILDING_MULTI_ARCH = 0
+CPPFLAGS = $(DEFINES) $(addprefix -I, $(abspath $(INCLUDEDIRS) ))
+CFLAGS = $(ARCH_FLAGS) $(CPPFLAGS) $(WARN_FLAGS) -fvisibility=$(SymbolVisibility) $(OptimizerLevel) -pipe $(GCC_ExtraCompilerFlags) -Usprintf -Ustrncpy -UPROTECTED_THINGS_ENABLE
+# In -std=gnu++0x mode we get lots of errors about "error: narrowing conversion". -fpermissive
+# turns these into warnings in gcc, and -Wno-c++11-narrowing suppresses them entirely in clang 3.1+.
+ifeq ($(CXX),clang++)
+	CXXFLAGS = $(CFLAGS) -std=gnu++0x -Wno-c++11-narrowing -Wno-dangling-else
+else
+	CXXFLAGS = $(CFLAGS) -std=gnu++0x -Wno-narrowing -fpermissive
+endif
+DEFINES += -DVPROF_LEVEL=1 -DGNUC -DNO_HOOK_MALLOC -DNO_MALLOC_OVERRIDE -D_GLIBCXX_USE_CXX11_ABI=0
+LDFLAGS = $(CFLAGS) $(GCC_ExtraLinkerFlags) $(OptimizerLevel) -fuse-ld=gold
+GENDEP_CXXFLAGS = -MD -MP -MF $(@:.o=.P) 
+MAP_FLAGS =
+Srv_GAMEOUTPUTFILE = 
+COPY_DLL_TO_SRV = 0
+
+
+ifeq ($(STEAM_BRANCH),1)
+	WARN_FLAGS = -Wall -Wextra -Wshadow -Wno-invalid-offsetof
+else
+	WARN_FLAGS = -Wno-write-strings -Wno-multichar
+endif
+
+WARN_FLAGS += -Wno-unknown-pragmas -Wno-unused-parameter -Wno-unused-value -Wno-missing-field-initializers -Wno-sign-compare -Wno-reorder -Wno-invalid-offsetof -Wno-float-equal -Werror=return-type -fdiagnostics-show-option -Wformat -Wformat-security
+
+
+ifeq ($(OS),Linux)
+	# We should always specify -Wl,--build-id, as documented at:
+	# http://linux.die.net/man/1/ld and http://fedoraproject.org/wiki/Releases/FeatureBuildId.http://fedoraproject.org/wiki/Releases/FeatureBuildId
+	LDFLAGS += -Wl,--build-id
+	# Set USE_VALVE_BINDIR to build with /Steam/tools/linux in the /valve/bin path.
+	#  Dedicated server uses this.
+	ifeq ($(USE_VALVE_BINDIR),1)
+		# dedicated server flags
+		ifeq ($(TARGET_PLATFORM),linux64)
+			VALVE_BINDIR = /valve/bin64/
+		else
+			VALVE_BINDIR = /valve/bin/
+		endif
+		STRIP_FLAGS =
+	else
+		# linux desktop client flags
+		VALVE_BINDIR =
+		# If the steam-runtime is available, use it. We should just default to using it when
+		#  buildbot and everyone has a bit of time to get it installed.
+		ifneq "$(wildcard /valve/steam-runtime/bin/)" ""
+			# The steam-runtime is incompatible with clang at this point, so disable it
+			# if clang is enabled.
+			ifneq ($(CXX),clang++)
+				VALVE_BINDIR = /valve/steam-runtime/bin/
+			endif
+		endif
+		GCC_VER =
+		# On dedicated servers, some plugins depend on global variable symbols in addition to functions.
+		# So symbols like _Z16ClearMultiDamagev should show up when you do "nm server_srv.so" in TF2.
+		STRIP_FLAGS = -x
+	endif
+	# core2 = MMX, SSE, SSE2, SSE3, SSSE3
+	MARCH_TARGET = core2
+	MTUNE_TARGET = sandybridge
+
+	ifeq ($(CXX),clang++)
+		# Clang does not support -mfpmath=sse because it uses whatever
+		# instruction set extensions are available by default.
+		SSE_GEN_FLAGS = -msse2
+	else
+		SSE_GEN_FLAGS = -msse2 -mfpmath=sse
+	endif
+
+	CCACHE := $(SRCROOT)/devtools/bin/linux/ccache
+
+	ifeq ($(origin GCC_VER), undefined)
+	GCC_VER=-4.6
+	endif
+	ifeq ($(origin AR), default)
+		AR = $(VALVE_BINDIR)ar crs
+	endif
+	ifeq ($(origin CC),default)
+		CC = $(CCACHE) $(VALVE_BINDIR)gcc$(GCC_VER)	
+	endif
+	ifeq ($(origin CXX), default)
+		CXX = $(CCACHE) $(VALVE_BINDIR)g++$(GCC_VER)
+	endif
+	# Support ccache with clang. Add -Qunused-arguments to avoid excessive warnings due to
+	# a ccache quirk. Could also upgrade ccache.
+	# http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html
+	ifeq ($(CC),clang)
+		CC = $(CCACHE) $(VALVE_BINDIR)clang -Qunused-arguments
+	endif
+	ifeq ($(CXX),clang++)
+		CXX = $(CCACHE) $(VALVE_BINDIR)clang++ -Qunused-arguments
+	endif
+	LINK ?= $(CC)
+
+	ifeq ($(TARGET_PLATFORM),linux64)
+		ARCH_FLAGS += -march=$(MARCH_TARGET) -mtune=$(MTUNE_TARGET)
+		LD_SO = ld-linux-x86_64.so.2
+		LIBSTDCXX := $(shell $(CXX) -print-file-name=libstdc++.a)
+		LIBSTDCXXPIC := $(shell $(CXX) -print-file-name=libstdc++-pic.a)
+	else
+		ARCH_FLAGS += -m32 -march=$(MARCH_TARGET) -mtune=$(MTUNE_TARGET)
+		LD_SO = ld-linux.so.2
+		LIBSTDCXX := $(shell $(CXX) $(ARCH_FLAGS) -print-file-name=libstdc++.so)
+		LIBSTDCXXPIC := $(shell $(CXX) $(ARCH_FLAGS) -print-file-name=libstdc++.so)
+		LDFLAGS += -m32
+	endif
+
+	GEN_SYM ?= $(SRCROOT)/devtools/gendbg.sh
+	ifeq ($(CFG),release)
+		STRIP ?= strip $(STRIP_FLAGS) -S
+	#	CFLAGS += -ffunction-sections -fdata-sections
+	#	LDFLAGS += -Wl,--gc-sections -Wl,--print-gc-sections
+	else
+		STRIP ?= true
+	endif
+	VSIGN ?= true
+
+	ifeq ($(SOURCE_SDK), 1)
+		Srv_GAMEOUTPUTFILE := $(GAMEOUTPUTFILE:.so=_srv.so)
+		COPY_DLL_TO_SRV := 1
+	endif
+
+	LINK_MAP_FLAGS = -Wl,-Map,$(@:.so=).map
+
+	SHLIBLDFLAGS = -shared $(LDFLAGS) -Wl,--no-undefined
+
+	_WRAP := -Xlinker --wrap=
+	PATHWRAP = $(_WRAP)fopen $(_WRAP)freopen $(_WRAP)open    $(_WRAP)creat    $(_WRAP)access  $(_WRAP)__xstat \
+		   $(_WRAP)stat  $(_WRAP)lstat   $(_WRAP)fopen64 $(_WRAP)open64   $(_WRAP)opendir $(_WRAP)__lxstat \
+		   $(_WRAP)chmod $(_WRAP)chown   $(_WRAP)lchown  $(_WRAP)symlink  $(_WRAP)link    $(_WRAP)__lxstat64 \
+		   $(_WRAP)mknod $(_WRAP)utimes  $(_WRAP)unlink  $(_WRAP)rename   $(_WRAP)utime   $(_WRAP)__xstat64 \
+		   $(_WRAP)mount $(_WRAP)mkfifo  $(_WRAP)mkdir   $(_WRAP)rmdir    $(_WRAP)scandir $(_WRAP)realpath
+
+	LIB_START_EXE = $(PATHWRAP) -static-libgcc -Wl,--start-group
+	LIB_END_EXE = -Wl,--end-group -lm -ldl $(LIBSTDCXX) -lpthread 
+
+	LIB_START_SHLIB = $(PATHWRAP) -static-libgcc -Wl,--start-group
+	LIB_END_SHLIB = -Wl,--end-group -lm -ldl $(LIBSTDCXXPIC) -lpthread -l:$(LD_SO) -Wl,--version-script=$(SRCROOT)/devtools/version_script.linux.txt
+
+endif
+
+ifeq ($(OS),Darwin)
+	CCACHE := $(SRCROOT)/devtools/bin/osx32/ccache
+	MAC_SDK_VER ?= 10.6
+	MAC_SDK := macosx$(MAC_SDK_VER)
+	SYSROOT := $(shell xcodebuild -sdk $(MAC_SDK) -version Path)
+
+	ifneq ($(origin MAC_SDK_VER), file)
+            $(warning Attempting build with SDK version $(MAC_SDK_VER), only 10.6 is supported and recommended!)
+	endif
+
+	ifeq ($(SYSROOT),)
+		FIRSTSDK := $(firstword $(sort $(shell xcodebuild -showsdks | grep macosx | sed 's/.*macosx//')))
+                $(error Could not find SDK version $(MAC_SDK_VER). Install and configure Xcode 4.3, or build with: make MAC_SDK_VER=$(FIRSTSDK))
+	endif
+
+	ifeq ($(origin CC), default)
+                # Test to see if you have a compiler in the right place, if you
+                # don't abort with an error
+		CLANG := $(shell xcrun -sdk $(MAC_SDK) -find clang)
+		ifeq ($(wildcard $(CLANG)),)
+                        $(error Unable to find C compiler, install and configure Xcode 4.3)
+		endif
+
+		CC := $(CCACHE) $(CLANG) -Qunused-arguments
+	endif
+
+	ifeq ($(origin CXX), default)
+		CXXLANG := $(shell xcrun -sdk $(MAC_SDK) -find clang++)
+		ifeq ($(wildcard $(CXXLANG)),)
+                        $(error Unable to find C++ compiler, install and configure Xcode 4.3)
+		endif
+
+		CXX := $(CCACHE) $(CXXLANG) -Qunused-arguments
+	endif
+	LINK ?= $(CXX)
+
+	ifeq ($(origin AR), default)
+		AR := $(shell xcrun -sdk $(MAC_SDK) -find libtool) -static -o
+	endif
+
+	ifeq ($(TARGET_PLATFORM),osx64)
+		ARCH_FLAGS += -arch x86_64 -m64 -march=core2
+	else ifeq (,$(findstring -arch x86_64,$(GCC_ExtraCompilerFlags)))
+		ARCH_FLAGS += -arch i386 -m32 -march=prescott -momit-leaf-frame-pointer -mtune=core2
+	else
+		# dirty hack to build a universal binary - don't specify the architecture
+		ARCH_FLAGS += -arch i386 -Xarch_i386 -march=prescott -Xarch_i386 -mtune=core2 -Xarch_i386 -momit-leaf-frame-pointer -Xarch_x86_64 -march=core2
+	endif
+
+	GEN_SYM ?= $(shell xcrun -sdk $(MAC_SDK) -find dsymutil)
+	ifeq ($(CFG),release)
+		STRIP ?= strip -S
+	else
+		STRIP ?= true
+	endif
+	ifeq ($(SOURCE_SDK), 1)
+		VSIGN ?= true
+	else
+		VSIGN ?= $(SRCROOT)/devtools/bin/vsign
+	endif
+
+	CPPFLAGS += -I$(SYSROOT)/usr/include/malloc
+	CFLAGS += -isysroot $(SYSROOT) -mmacosx-version-min=10.5 -fasm-blocks
+
+	LIB_START_EXE = -lm -ldl -lpthread
+	LIB_END_EXE = 
+
+	LIB_START_SHLIB = 
+	LIB_END_SHLIB = 
+
+	SHLIBLDFLAGS = $(LDFLAGS) -bundle -flat_namespace -undefined suppress -Wl,-dead_strip -Wl,-no_dead_strip_inits_and_terms 
+
+	ifeq (lib,$(findstring lib,$(GAMEOUTPUTFILE)))
+		SHLIBLDFLAGS = $(LDFLAGS) -dynamiclib -current_version 1.0 -compatibility_version 1.0 -install_name @rpath/$(basename $(notdir $(GAMEOUTPUTFILE))).dylib $(SystemLibraries) -Wl,-dead_strip -Wl,-no_dead_strip_inits_and_terms 
+	endif
+
+endif
+
+#
+# Profile-directed optimizations.
+# Note: Last time these were tested 3/5/08, it actually slowed down the server benchmark by 5%!
+#
+# First, uncomment these, build, and test. It will generate .gcda and .gcno files where the .o files are.
+# PROFILE_LINKER_FLAG=-fprofile-arcs
+# PROFILE_COMPILER_FLAG=-fprofile-arcs
+#
+# Then, comment the above flags out again and rebuild with this flag uncommented:
+# PROFILE_COMPILER_FLAG=-fprofile-use
+#
+
+#############################################################################
+# The compiler command lne for each src code file to compile
+#############################################################################
+
+OBJ_DIR = ./obj_$(NAME)_$(TARGET_PLATFORM)$(TARGET_PLATFORM_EXT)/$(CFG)
+CPP_TO_OBJ = $(CPPFILES:.cpp=.o)
+CXX_TO_OBJ = $(CPP_TO_OBJ:.cxx=.o)
+CC_TO_OBJ = $(CXX_TO_OBJ:.cc=.o)
+MM_TO_OBJ = $(CC_TO_OBJ:.mm=.o)
+C_TO_OBJ = $(MM_TO_OBJ:.c=.o)
+OBJS = $(addprefix $(OBJ_DIR)/, $(notdir $(C_TO_OBJ)))
+
+ifeq ($(MAKE_VERBOSE),1)
+	QUIET_PREFIX = 
+	QUIET_ECHO_POSTFIX = 
+else
+	QUIET_PREFIX = @
+	QUIET_ECHO_POSTFIX = > /dev/null
+endif
+
+ifeq ($(MAKE_CC_VERBOSE),1)
+CC += -v
+endif
+
+ifeq ($(CONFTYPE),lib)
+  LIB_File = $(OUTPUTFILE)
+endif
+
+ifeq ($(CONFTYPE),dll)
+  SO_File = $(OUTPUTFILE)
+endif
+
+ifeq ($(CONFTYPE),exe)
+  EXE_File = $(OUTPUTFILE)
+endif
+
+# we generate dependencies as a side-effect of compilation now
+GEN_DEP_FILE=
+
+PRE_COMPILE_FILE = 
+
+POST_COMPILE_FILE = 
+
+ifeq ($(BUILDING_MULTI_ARCH),1)
+	SINGLE_ARCH_CXXFLAGS=$(subst -arch x86_64,,$(CXXFLAGS))
+	COMPILE_FILE = \
+		$(QUIET_PREFIX) \
+		echo "---- $(lastword $(subst /, ,$<)) as MULTIARCH----";\
+		mkdir -p $(OBJ_DIR) && \
+		$(CXX) $(SINGLE_ARCH_CXXFLAGS) $(GENDEP_CXXFLAGS) -o $@ -c $< && \
+		$(CXX) $(CXXFLAGS) -o $@ -c $<
+else
+	COMPILE_FILE = \
+		$(QUIET_PREFIX) \
+		echo "---- $(lastword $(subst /, ,$<)) ----";\
+		mkdir -p $(OBJ_DIR) && \
+		$(CXX) $(CXXFLAGS) $(GENDEP_CXXFLAGS) -o $@ -c $<
+endif
+
+ifneq "$(origin VALVE_NO_AUTO_P4)" "undefined"
+	P4_EDIT_START = chmod -R +w
+	P4_EDIT_END = || true
+	P4_REVERT_START = true
+	P4_REVERT_END =
+else
+	ifndef P4_EDIT_CHANGELIST
+		# You can use an environment variable to specify what changelist to check the Linux Binaries out into. Normally the default
+		# setting is best, but here is an alternate example:
+		# export P4_EDIT_CHANGELIST_CMD="echo 1424335"
+		# ?= means that if P4_EDIT_CHANGELIST_CMD is already set it won't be changed.
+		P4_EDIT_CHANGELIST_CMD ?= p4 changes -c `p4 client -o | grep ^Client | cut -f 2` -s pending | fgrep 'POSIX Auto Checkout' | cut -d' ' -f 2 | tail -n 1
+		P4_EDIT_CHANGELIST := $(shell $(P4_EDIT_CHANGELIST_CMD))
+	endif
+	ifeq ($(P4_EDIT_CHANGELIST),)
+		# If we haven't found a changelist to check out to then create one. The name must match the one from a few
+		# lines above or else a new changelist will be created each time.
+		# Warning: the behavior of 'echo' is not consistent. In bash you need the "-e" option in order for \n to be
+		# interpreted as a line-feed, but in dash you do not, and if "-e" is passed along then it is printed, which
+		# confuses p4. So, if you run this command from the bash shell don't forget to add "-e" to the echo command.
+		P4_EDIT_CHANGELIST = $(shell echo "Change: new\nDescription: POSIX Auto Checkout" | p4 change -i | cut -f 2 -d ' ')
+	endif
+
+	P4_EDIT_START := for f in
+	P4_EDIT_END := ; do if [ -n $$f ]; then if [ -d $$f ]; then find $$f -type f -print | p4 -x - edit -c $(P4_EDIT_CHANGELIST); else p4 edit -c $(P4_EDIT_CHANGELIST) $$f; fi; fi; done $(QUIET_ECHO_POSTFIX)
+	P4_REVERT_START := for f in  
+	P4_REVERT_END := ; do if [ -n $$f ]; then if [ -d $$f ]; then find $$f -type f -print | p4 -x - revert; else p4 revert $$f; fi; fi; done $(QUIET_ECHO_POSTFIX) 
+endif
+
+ifeq ($(CONFTYPE),dll)
+all: $(OTHER_DEPENDENCIES) $(OBJS) $(GAMEOUTPUTFILE)
+	@echo $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX)
+else
+all: $(OTHER_DEPENDENCIES) $(OBJS) $(OUTPUTFILE)
+	@echo $(OUTPUTFILE) $(QUIET_ECHO_POSTFIX)
+endif
+
+.PHONY: clean cleantargets cleanandremove rebuild relink RemoveOutputFile SingleFile
+
+
+rebuild :
+	$(MAKE) -f $(firstword $(MAKEFILE_LIST)) cleanandremove
+	$(MAKE) -f $(firstword $(MAKEFILE_LIST))
+
+
+# Use the relink target to force to relink the project.
+relink: RemoveOutputFile all
+
+RemoveOutputFile:
+	rm -f $(OUTPUTFILE)
+
+
+# This rule is so you can say "make SingleFile SingleFilename=/home/myname/valve_main/src/engine/language.cpp" and have it only build that file.
+# It basically just translates the full filename to create a dependency on the appropriate .o file so it'll build that.
+SingleFile : RemoveSingleFile $(OBJ_DIR)/$(basename $(notdir $(SingleFilename))).o
+	@echo ""
+
+RemoveSingleFile:
+	$(QUIET_PREFIX) rm -f $(OBJ_DIR)/$(basename $(notdir $(SingleFilename))).o
+
+clean:
+ifneq "$(OBJ_DIR)" ""
+	$(QUIET_PREFIX) echo "rm -rf $(OBJ_DIR)"
+	$(QUIET_PREFIX) rm -rf $(OBJ_DIR)
+endif
+ifneq "$(OUTPUTFILE)" ""
+	$(QUIET_PREFIX) if [ -e $(OUTPUTFILE) ]; then \
+		echo "p4 revert $(OUTPUTFILE)"; \
+		$(P4_REVERT_START) $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT) $(P4_REVERT_END); \
+	fi;
+endif
+ifneq "$(OTHER_DEPENDENCIES)" ""
+	$(QUIET_PREFIX) echo "rm -f $(OTHER_DEPENDENCIES)"
+	$(QUIET_PREFIX) rm -f $(OTHER_DEPENDENCIES)
+endif
+ifneq "$(GAMEOUTPUTFILE)" ""
+	$(QUIET_PREFIX) echo "p4 revert $(GAMEOUTPUTFILE)"
+	$(QUIET_PREFIX) $(P4_REVERT_START) $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_REVERT_END)
+endif
+
+
+# Do the above cleaning, except with p4 edit and rm. Reason being ar crs adds and replaces obj files to the
+# archive. However if you've renamed or deleted a source file, $(AR) won't remove it. This can leave
+# us with archive files that have extra unused symbols, and also potentially cause compilation errors
+# when you rename a file and have many duplicate symbols.
+cleanandremove:
+ifneq "$(OBJ_DIR)" ""
+	$(QUIET_PREFIX) echo "rm -rf $(OBJ_DIR)"
+	$(QUIET_PREFIX) -rm -rf $(OBJ_DIR)
+endif
+ifneq "$(OUTPUTFILE)" ""
+	$(QUIET_PREFIX) if [ -e $(OUTPUTFILE) ]; then \
+		echo "p4 edit and rm -f $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT)"; \
+		$(P4_EDIT_START) $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END); \
+	fi;
+	$(QUIET_PREFIX) -rm -f $(OUTPUTFILE) $(OUTPUTFILE)$(SYM_EXT);
+endif
+ifneq "$(OTHER_DEPENDENCIES)" ""
+	$(QUIET_PREFIX) echo "rm -f $(OTHER_DEPENDENCIES)"
+	$(QUIET_PREFIX) -rm -f $(OTHER_DEPENDENCIES)
+endif
+ifneq "$(GAMEOUTPUTFILE)" ""
+	$(QUIET_PREFIX) echo "p4 edit and rm -f $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT)"
+	$(QUIET_PREFIX) $(P4_EDIT_START) $(GAMEOUTPUTFILE) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END)
+	$(QUIET_PREFIX) -rm -f $(GAMEOUTPUTFILE)
+endif
+
+
+# This just deletes the final targets so it'll do a relink next time we build.
+cleantargets:
+	$(QUIET_PREFIX) rm -f $(OUTPUTFILE) $(GAMEOUTPUTFILE)
+
+
+$(LIB_File): $(OTHER_DEPENDENCIES) $(OBJS) 
+	$(QUIET_PREFIX) -$(P4_EDIT_START) $(LIB_File) $(P4_EDIT_END); 
+	$(QUIET_PREFIX) $(AR) $(LIB_File) $(OBJS) $(LIBFILES);
+
+SO_GameOutputFile = $(GAMEOUTPUTFILE)
+
+# Remove the target before installing a file over it; this prevents existing
+# instances of the game from crashing due to the overwrite.
+$(SO_GameOutputFile): $(SO_File)
+	$(QUIET_PREFIX) \
+	$(P4_EDIT_START) $(GAMEOUTPUTFILE) $(P4_EDIT_END) && \
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	echo "---- COPYING TO $@ [$(CFG)] ----";\
+	echo "----" $(QUIET_ECHO_POSTFIX);
+	$(QUIET_PREFIX) -$(P4_EDIT_START) $(GAMEOUTPUTFILE) $(P4_EDIT_END);
+	$(QUIET_PREFIX) -mkdir -p `dirname $(GAMEOUTPUTFILE)` > /dev/null;
+	$(QUIET_PREFIX) rm -f $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);
+	$(QUIET_PREFIX) cp -v $(OUTPUTFILE) $(GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);
+	$(QUIET_PREFIX) -$(P4_EDIT_START) $(GAMEOUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END);
+	$(QUIET_PREFIX) $(GEN_SYM) $(GAMEOUTPUTFILE); 
+	$(QUIET_PREFIX) -$(STRIP) $(GAMEOUTPUTFILE);
+	$(QUIET_PREFIX) $(VSIGN) -signvalve $(GAMEOUTPUTFILE);
+	$(QUIET_PREFIX) if [ "$(COPY_DLL_TO_SRV)" = "1" ]; then\
+		echo "----" $(QUIET_ECHO_POSTFIX);\
+		echo "---- COPYING TO $(Srv_GAMEOUTPUTFILE) ----";\
+		echo "----" $(QUIET_ECHO_POSTFIX);\
+		cp -v $(GAMEOUTPUTFILE) $(Srv_GAMEOUTPUTFILE) $(QUIET_ECHO_POSTFIX);\
+		cp -v $(GAMEOUTPUTFILE)$(SYM_EXT) $(Srv_GAMEOUTPUTFILE)$(SYM_EXT) $(QUIET_ECHO_POSTFIX);\
+	fi;
+	$(QUIET_PREFIX) if [ "$(IMPORTLIBRARY)" != "" ]; then\
+		echo "----" $(QUIET_ECHO_POSTFIX);\
+		echo "---- COPYING TO IMPORT LIBRARY $(IMPORTLIBRARY) ----";\
+		echo "----" $(QUIET_ECHO_POSTFIX);\
+		$(P4_EDIT_START) $(IMPORTLIBRARY) $(P4_EDIT_END) && \
+		mkdir -p `dirname $(IMPORTLIBRARY)` > /dev/null && \
+		cp -v $(OUTPUTFILE) $(IMPORTLIBRARY); \
+	fi;
+
+
+$(SO_File): $(OTHER_DEPENDENCIES) $(OBJS) $(LIBFILENAMES)
+	$(QUIET_PREFIX) \
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	echo "---- LINKING $@ [$(CFG)] ----";\
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	\
+	$(LINK) $(LINK_MAP_FLAGS) $(SHLIBLDFLAGS) $(PROFILE_LINKER_FLAG) -o $(OUTPUTFILE) $(LIB_START_SHLIB) $(OBJS) $(LIBFILES) $(SystemLibraries) $(LIB_END_SHLIB);
+	$(VSIGN) -signvalve $(OUTPUTFILE);
+
+
+$(EXE_File) : $(OTHER_DEPENDENCIES) $(OBJS) $(LIBFILENAMES)
+	$(QUIET_PREFIX) \
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	echo "---- LINKING EXE $@ [$(CFG)] ----";\
+	echo "----" $(QUIET_ECHO_POSTFIX);\
+	\
+	$(P4_EDIT_START) $(OUTPUTFILE) $(P4_EDIT_END);\
+	$(LINK) $(LINK_MAP_FLAGS) $(LDFLAGS) $(PROFILE_LINKER_FLAG) -o $(OUTPUTFILE) $(LIB_START_EXE) $(OBJS) $(LIBFILES) $(SystemLibraries) $(LIB_END_EXE);
+	$(QUIET_PREFIX) -$(P4_EDIT_START) $(OUTPUTFILE)$(SYM_EXT) $(P4_EDIT_END);
+	$(QUIET_PREFIX) $(GEN_SYM) $(OUTPUTFILE);
+	$(QUIET_PREFIX) -$(STRIP) $(OUTPUTFILE);
+	$(QUIET_PREFIX) $(VSIGN) -signvalve $(OUTPUTFILE);
+
+
+tags:
+	etags -a -C -o $(SRCROOT)/TAGS *.cpp *.cxx *.h *.hxx
diff --git a/sp/src/public/particles/particles.h b/sp/src/public/particles/particles.h
index 16b48e74..0572b848 100644
--- a/sp/src/public/particles/particles.h
+++ b/sp/src/public/particles/particles.h
@@ -1375,7 +1375,7 @@ private:
 
 
 
-class CM128InitialAttributeIterator : public CStridedConstPtr<fltx4>
+class CM128InitialAttributeIterator : public CFltx4StridedConstPtr
 {
 public:
 	FORCEINLINE CM128InitialAttributeIterator( int nAttribute, CParticleCollection *pParticles )
@@ -1385,7 +1385,7 @@ public:
 };
 
 
-class CM128AttributeIterator : public CStridedConstPtr<fltx4>
+class CM128AttributeIterator : public CFltx4StridedConstPtr
 {
 public:
 	FORCEINLINE CM128AttributeIterator( int nAttribute, CParticleCollection *pParticles )
@@ -1403,7 +1403,7 @@ public:
 	}
 };
 
-class CM128AttributeWriteIterator : public CStridedPtr<fltx4>
+class CM128AttributeWriteIterator : public CFltx4StridedPtr
 {
 public:
 	FORCEINLINE CM128AttributeWriteIterator( void )
diff --git a/sp/src/public/tier1/utlblockmemory.h b/sp/src/public/tier1/utlblockmemory.h
index b4a254ff..8d86c59e 100644
--- a/sp/src/public/tier1/utlblockmemory.h
+++ b/sp/src/public/tier1/utlblockmemory.h
@@ -135,10 +135,10 @@ CUtlBlockMemory<T,I>::~CUtlBlockMemory()
 template< class T, class I >
 void CUtlBlockMemory<T,I>::Swap( CUtlBlockMemory< T, I > &mem )
 {
-	swap( m_pMemory, mem.m_pMemory );
-	swap( m_nBlocks, mem.m_nBlocks );
-	swap( m_nIndexMask, mem.m_nIndexMask );
-	swap( m_nIndexShift, mem.m_nIndexShift );
+	V_swap( m_pMemory, mem.m_pMemory );
+	V_swap( m_nBlocks, mem.m_nBlocks );
+	V_swap( m_nIndexMask, mem.m_nIndexMask );
+	V_swap( m_nIndexShift, mem.m_nIndexShift );
 }
 
 
diff --git a/sp/src/public/tier1/utlsoacontainer.h b/sp/src/public/tier1/utlsoacontainer.h
index b9440c5f..284358db 100644
--- a/sp/src/public/tier1/utlsoacontainer.h
+++ b/sp/src/public/tier1/utlsoacontainer.h
@@ -109,6 +109,95 @@ public:
 	}
 };
 
+class CFltx4StridedPtr
+{
+private:
+	typedef __m128 T;
+
+protected:
+	T *m_pData;
+	size_t m_nStride;
+	
+public:
+	FORCEINLINE CFltx4StridedPtr( void *pData, size_t nByteStride )
+	{
+		m_pData = reinterpret_cast<T *>( pData );
+		m_nStride = nByteStride / sizeof( T );
+	}
+
+	FORCEINLINE CFltx4StridedPtr( void ) {}
+	T *operator->(void) const
+	{
+		return m_pData;
+	}
+	
+	T & operator*(void) const
+	{
+		return *m_pData;
+	}
+	
+	FORCEINLINE operator T *(void)
+	{
+		return m_pData;
+	}
+
+	FORCEINLINE CFltx4StridedPtr& operator++(void)
+	{
+		m_pData += m_nStride;
+		return *this;
+	}
+
+	FORCEINLINE void operator+=( size_t nNumElements )
+	{
+		m_pData += nNumElements * m_nStride;
+	}
+
+};
+
+class CFltx4StridedConstPtr
+{
+private:
+	typedef __m128 T;
+
+protected:
+	const T *m_pData;
+	size_t m_nStride;
+
+public:
+	FORCEINLINE CFltx4StridedConstPtr( void const *pData, size_t nByteStride )
+	{
+		m_pData = reinterpret_cast<T const *>( pData );
+		m_nStride = nByteStride / sizeof( T );
+	}
+
+	FORCEINLINE CFltx4StridedConstPtr( void ) {}
+
+	const T *operator->(void) const
+	{
+		return m_pData;
+	}
+
+	const T & operator*(void) const
+	{
+		return *m_pData;
+	}
+
+	FORCEINLINE operator const T *(void) const
+	{
+		return m_pData;
+	}
+
+	FORCEINLINE CFltx4StridedConstPtr &operator++(void)
+	{
+		m_pData += m_nStride;
+		return *this;
+	}
+	FORCEINLINE void operator+=( size_t nNumElements )
+	{
+		m_pData += nNumElements*m_nStride;
+	}
+};
+
 // allowed field data types. if you change these values, you need to change the tables in the .cpp file
 enum EAttributeDataType
 {
@@ -311,19 +400,19 @@ public:
 
 };
 
-class CFltX4AttributeIterator : public CStridedConstPtr<fltx4>
+class CFltX4AttributeIterator : public CFltx4StridedConstPtr
 {
 	FORCEINLINE CFltX4AttributeIterator( CSOAContainer const *pContainer, int nAttribute, int nRowNumber = 0 )
-		: CStridedConstPtr<fltx4>( pContainer->ConstRowPtr( nAttribute, nRowNumber), 
+		: CFltx4StridedConstPtr( pContainer->ConstRowPtr( nAttribute, nRowNumber),
 								   pContainer->ItemByteStride( nAttribute ) )
 	{
 	}
 };
 
-class CFltX4AttributeWriteIterator : public CStridedPtr<fltx4>
+class CFltX4AttributeWriteIterator : public CFltx4StridedPtr
 {
 	FORCEINLINE CFltX4AttributeWriteIterator( CSOAContainer const *pContainer, int nAttribute, int nRowNumber = 0 )
-		: CStridedPtr<fltx4>( pContainer->RowPtr( nAttribute, nRowNumber), 
+		: CFltx4StridedPtr( pContainer->RowPtr( nAttribute, nRowNumber),
 							  pContainer->ItemByteStride( nAttribute ) )
 	{
 	}