diff --git a/lib/mac/mathlib_i486.a b/lib/mac/mathlib_i486.a
index 663cd7aa..4504c488 100644
Binary files a/lib/mac/mathlib_i486.a and b/lib/mac/mathlib_i486.a differ
diff --git a/lib/mac/tier1_i486.a b/lib/mac/tier1_i486.a
index c0f2cdde..51086ed5 100644
Binary files a/lib/mac/tier1_i486.a and b/lib/mac/tier1_i486.a differ
diff --git a/linux_sdk/Makefile b/linux_sdk/Makefile
index dd3dd73b..94616bf2 100644
--- a/linux_sdk/Makefile
+++ b/linux_sdk/Makefile
@@ -92,7 +92,7 @@ SHLIBSUFFIX =
 endif
 
 DEFINES +=-DVPROF_LEVEL=1 -DSWDS -D_finite=finite -Dstricmp=strcasecmp -D_stricmp=strcasecmp -D_strnicmp=strncasecmp \
-	-Dstrnicmp=strncasecmp -D_vsnprintf=vsnprintf -D_alloca=alloca -Dstrcmpi=strcasecmp
+	-Dstrnicmp=strncasecmp -D_vsnprintf=vsnprintf -D_alloca=alloca -Dstrcmpi=strcasecmp -DPOSIX -DNO_MALLOC_OVERRIDE -DNO_HOOK_MALLOC
 UNDEF = -Usprintf -Ustrncpy -UPROTECTED_THINGS_ENABLE
 
 BASE_CFLAGS = -fno-strict-aliasing -Wall -Wsign-compare -Werror -Wno-conversion -Wno-overloaded-virtual -Wno-non-virtual-dtor -Wno-invalid-offsetof \
diff --git a/mathlib/sse.cpp b/mathlib/sse.cpp
index d39c24f8..a0e166c2 100644
--- a/mathlib/sse.cpp
+++ b/mathlib/sse.cpp
@@ -16,8 +16,10 @@
 // memdbgon must be the last include file in a .cpp file!!!
 #include "tier0/memdbgon.h"
 
+#ifdef _WIN32
 static const uint32 _sincos_masks[]	  = { (uint32)0x0,  (uint32)~0x0 };
 static const uint32 _sincos_inv_masks[] = { (uint32)~0x0, (uint32)0x0 };
+#endif
 
 //-----------------------------------------------------------------------------
 // Macros and constants required by some of the SSE assembly:
@@ -49,6 +51,7 @@ static const uint32 _sincos_inv_masks[] = { (uint32)~0x0, (uint32)0x0 };
 		static const __attribute__((aligned(16))) float _ps_##Name[4] = { Val, Val, Val, Val }
 #endif
 
+#ifdef _WIN32
 _PS_EXTERN_CONST(am_0, 0.0f);
 _PS_EXTERN_CONST(am_1, 1.0f);
 _PS_EXTERN_CONST(am_m1, -1.0f);
@@ -72,6 +75,7 @@ _PS_CONST(sincos_p0, 0.15707963267948963959e1f);
 _PS_CONST(sincos_p1, -0.64596409750621907082e0f);
 _PS_CONST(sincos_p2, 0.7969262624561800806e-1f);
 _PS_CONST(sincos_p3, -0.468175413106023168e-2f);
+#endif
 
 #ifdef PFN_VECTORMA
 void  __cdecl _SSE_VectorMA( const float *start, float scale, const float *direction, float *dest );
diff --git a/mathlib/sseconst.cpp b/mathlib/sseconst.cpp
index 662943be..31d40906 100644
--- a/mathlib/sseconst.cpp
+++ b/mathlib/sseconst.cpp
@@ -30,6 +30,7 @@ const fltx4 Four_FLT_MAX={FLT_MAX,FLT_MAX,FLT_MAX,FLT_MAX};
 const fltx4 Four_Negative_FLT_MAX={-FLT_MAX,-FLT_MAX,-FLT_MAX,-FLT_MAX};
 const fltx4 g_SIMD_0123 = { 0., 1., 2., 3. };
 
+#ifdef _X360
 const fltx4 g_QuatMultRowSign[4] =
 {
 	{  1.0f,  1.0f, -1.0f, 1.0f },
@@ -37,6 +38,7 @@ const fltx4 g_QuatMultRowSign[4] =
 	{  1.0f, -1.0f,  1.0f, 1.0f },
 	{ -1.0f, -1.0f, -1.0f, 1.0f }
 };
+#endif
 
 const int32 ALIGN16 g_SIMD_clear_signmask[4]= {0x7fffffff,0x7fffffff,0x7fffffff,0x7fffffff};
 const int32 ALIGN16 g_SIMD_signmask[4]= { 0x80000000, 0x80000000, 0x80000000, 0x80000000 };
diff --git a/public/tier0/memdbgon.h b/public/tier0/memdbgon.h
index 34f7550b..13b4ed42 100644
--- a/public/tier0/memdbgon.h
+++ b/public/tier0/memdbgon.h
@@ -35,7 +35,7 @@
 		#include <wchar.h>
 	#endif
 	#include <string.h>
-	#include <malloc.h>
+	#include <stdlib.h>
 #include "tier0/valve_on.h"
 
 #include "commonmacros.h"
diff --git a/tier1/bitbuf.cpp b/tier1/bitbuf.cpp
index f49f5ea0..fbaf4e86 100644
--- a/tier1/bitbuf.cpp
+++ b/tier1/bitbuf.cpp
@@ -867,7 +867,9 @@ int old_bf_read::ReadSBitLong( int numbits )
 }
 
 const byte g_BitMask[8] = {0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80};
+#if FAST_BIT_SCAN
 const byte g_TrailingMask[8] = {0xff, 0xfe, 0xfc, 0xf8, 0xf0, 0xe0, 0xc0, 0x80};
+#endif
 
 inline int old_bf_read::CountRunOfZeros()
 {