Index: src/btreeInt.h
==================================================================
--- src/btreeInt.h
+++ src/btreeInt.h
@@ -698,12 +698,14 @@
 ** two-byte aligned address.  get2bytea() is only used for accessing the
 ** cell addresses in a btree header.
 */
 #if SQLITE_BYTEORDER==4321
 # define get2byteAligned(x)  (*(u16*)(x))
-#elif SQLITE_BYTEORDER==1234 && GCC_VERSION>=4008000
+#elif SQLITE_BYTEORDER==1234 && !defined(SQLITE_DISABLE_INTRINSIC) \
+    && GCC_VERSION>=4008000
 # define get2byteAligned(x)  __builtin_bswap16(*(u16*)(x))
-#elif SQLITE_BYTEORDER==1234 && defined(_MSC_VER) && _MSC_VER>=1300
+#elif SQLITE_BYTEORDER==1234 && !defined(SQLITE_DISABLE_INTRINSIC) \
+    && defined(_MSC_VER) && _MSC_VER>=1300
 # define get2byteAligned(x)  _byteswap_ushort(*(u16*)(x))
 #else
 # define get2byteAligned(x)  ((x)[0]<<8 | (x)[1])
 #endif

Index: src/sqliteInt.h
==================================================================
--- src/sqliteInt.h
+++ src/sqliteInt.h
@@ -185,19 +185,22 @@
 #  define SQLITE_NOINLINE
 #endif
 
 /*
 ** Make sure that the compiler intrinsics we desire are enabled when
-** compiling with an appropriate version of MSVC.
+** compiling with an appropriate version of MSVC unless prevented by
+** the SQLITE_DISABLE_INTRINSIC define.
 */
-#if defined(_MSC_VER) && _MSC_VER>=1300
-#  if !defined(_WIN32_WCE)
-#    include <intrin.h>
-#    pragma intrinsic(_byteswap_ushort)
-#    pragma intrinsic(_byteswap_ulong)
-#  else
-#    include <cmnintrin.h>
+#if !defined(SQLITE_DISABLE_INTRINSIC)
+#  if defined(_MSC_VER) && _MSC_VER>=1300
+#    if !defined(_WIN32_WCE)
+#      include <intrin.h>
+#      pragma intrinsic(_byteswap_ushort)
+#      pragma intrinsic(_byteswap_ulong)
+#    else
+#      include <cmnintrin.h>
+#    endif
 #  endif
 #endif
 
 /*
 ** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2.

Index: src/util.c
==================================================================
--- src/util.c
+++ src/util.c
@@ -1080,15 +1080,17 @@
 u32 sqlite3Get4byte(const u8 *p){
 #if SQLITE_BYTEORDER==4321
   u32 x;
   memcpy(&x,p,4);
   return x;
-#elif SQLITE_BYTEORDER==1234 && defined(__GNUC__) && GCC_VERSION>=4003000
+#elif SQLITE_BYTEORDER==1234 && !defined(SQLITE_DISABLE_INTRINSIC) \
+    && defined(__GNUC__) && GCC_VERSION>=4003000
   u32 x;
   memcpy(&x,p,4);
   return __builtin_bswap32(x);
-#elif SQLITE_BYTEORDER==1234 && defined(_MSC_VER) && _MSC_VER>=1300
+#elif SQLITE_BYTEORDER==1234 && !defined(SQLITE_DISABLE_INTRINSIC) \
+    && defined(_MSC_VER) && _MSC_VER>=1300
   u32 x;
   memcpy(&x,p,4);
   return _byteswap_ulong(x);
 #else
   testcase( p[0]&0x80 );