diff --git a/src/acc/acc_arch.h b/src/acc/acc_arch.h
index ce40bd3a..c3642216 100644
--- a/src/acc/acc_arch.h
+++ b/src/acc/acc_arch.h
@@ -31,7 +31,8 @@
  *   ACC_ENDIAN_BIG_ENDIAN
  *
  * Note that this list is not exhaustive - actually we only really care
- * about IA32 which allows unaligned memory access (at reasonable speed).
+ * about architectures which allows unaligned memory access at reasonable
+ * speed (for the moment this means IA16 and IA32).
  */
 
 #if (ACC_OS_DOS16 || ACC_OS_OS216 || ACC_OS_WIN16)
@@ -50,11 +51,11 @@
 #  define ACC_ARCH_IA64             1
 #  define ACC_INFO_ARCH             "ia64"
 #elif (ACC_OS_DOS32 || ACC_OS_OS2)
-#  error "missing define for CPU architechture"
-#elif (0 && ACC_OS_WIN32)
-#  error "missing define for CPU architechture"
-#elif (0 && ACC_OS_WIN64)
-#  error "missing define for CPU architechture"
+#  error "missing define for CPU architecture"
+#elif (ACC_OS_WIN32)
+#  error "missing define for CPU architecture"
+#elif (ACC_OS_WIN64)
+#  error "missing define for CPU architecture"
 #elif (ACC_OS_TOS) || defined(__m68000__)
 #  define ACC_ARCH_M68K             1
 #  define ACC_INFO_ARCH             "m68k"
diff --git a/src/acc/acc_auto.h b/src/acc/acc_auto.h
index ae43772c..5c95808c 100644
--- a/src/acc/acc_auto.h
+++ b/src/acc/acc_auto.h
@@ -187,12 +187,12 @@
 #elif (ACC_CC_TURBOC)
 #  undef HAVE_UNISTD_H
 #  undef HAVE_SYS_TIME_H
+#  undef HAVE_SYS_TYPES_H /* useless */
 #  if (ACC_OS_WIN32 || ACC_OS_WIN64)
 #    undef HAVE_DIRENT_H /* pulls in <windows.h>; use <dir.h> instead */
 #  endif
 #  if (__TURBOC__ < 0x0200)
 #    undef HAVE_SIGNAL_H /* not working */
-#    undef HAVE_SYS_TYPES_H
 #  endif
 #  if (__TURBOC__ < 0x0400)
 #    undef HAVE_DIRECT_H
@@ -319,7 +319,7 @@
 #  undef HAVE_UTIME /* struct utimbuf is missing */
 #  undef HAVE_VSNPRINTF
 #elif (ACC_CC_BORLANDC)
-#  if (ACC_OS_DOS16 || ACC_OS_WIN16)
+#  if defined(ACC_MM_TINY)
 #    undef HAVE_DIFFTIME /* difftime() is in the math library */
 #  endif
 #  if (__BORLANDC__ < 0x0400)
@@ -339,7 +339,7 @@
 #elif defined(__DJGPP__)
 #  undef HAVE_SNPRINTF
 #  undef HAVE_VSNPRINTF
-#elif (ACC_CC_IBMC && ACC_OS_OS2)
+#elif (ACC_CC_IBMC)
 #  undef HAVE_SNPRINTF
 #  undef HAVE_VSNPRINTF
 #elif (ACC_CC_INTELC)
@@ -493,7 +493,7 @@
 #  define SIZEOF___INT64            8
 #  define SIZEOF_UNSIGNED___INT64   8
 #elif (ACC_ARCH_IA32 && (ACC_CC_BORLANDC && __BORLANDC__ >= 0x0520))
-   /* WARNING: unsigned __int64 is somewhat broken in 0x0520 */
+   /* INFO: unsigned __int64 is somewhat broken in 0x0520; fixed in 0x0530 */
 #  define SIZEOF___INT64            8
 #  define SIZEOF_UNSIGNED___INT64   8
 #elif (ACC_ARCH_IA32 && (ACC_CC_WATCOMC && __WATCOMC__ >= 1100))
diff --git a/src/acc/acc_chk.ch b/src/acc/acc_chk.ch
index b6a85384..90ea9f71 100644
--- a/src/acc/acc_chk.ch
+++ b/src/acc/acc_chk.ch
@@ -23,7 +23,7 @@
 
 /* compile-time sign */
 #if !defined(ACCCHK_ASSERT_SIGN_T)
-#  define ACCCHK_ASSERT_SIGN_T(type, relop) \
+#  define ACCCHK_ASSERT_SIGN_T(type,relop) \
         ACCCHK_ASSERT( (type) (-1)       relop  (type) 0 ) \
         ACCCHK_ASSERT( (type) (~(type)0) relop  (type) 0 ) \
         ACCCHK_ASSERT( (type) (~(type)0) ==     (type) (-1) )
diff --git a/src/acc/acc_cxx.h b/src/acc/acc_cxx.h
index f614661f..ea38ee83 100644
--- a/src/acc/acc_cxx.h
+++ b/src/acc/acc_cxx.h
@@ -19,9 +19,22 @@
 
 
 /*************************************************************************
-//
+// exceptions
+//   ACC_CXX_NOTHROW
 **************************************************************************/
 
+#if (ACC_CC_GNUC && (ACC_CC_GNUC < 0x028000ul))
+#  define ACC_CXX_NOTHROW
+#elif (ACC_CC_BORLANDC && (__BORLANDC__ < 0x0450))
+#  define ACC_CXX_NOTHROW
+#elif (ACC_CC_TURBOC)
+#  define ACC_CXX_NOTHROW
+#elif (ACC_CC_MSC && (_MSC_VER < 1100))
+#  define ACC_CXX_NOTHROW
+#elif (ACC_CC_WATCOMC && !defined(_CPPUNWIND))
+#  define ACC_CXX_NOTHROW
+#endif
+
 #if !defined(ACC_CXX_NOTHROW)
 #  define ACC_CXX_NOTHROW   throw()
 #endif
@@ -29,58 +42,89 @@
 
 /*************************************************************************
 // disable dynamic allocation of an object
+//   ACC_CXX_DISABLE_NEW_DELETE
+//   ACC_CXX_DISABLE_NEW_DELETE_STRICT
 **************************************************************************/
 
-#if defined(new) || defined(delete)
-#elif (ACC_CC_SYMANTECC || ACC_CC_ZORTECHC)
+#undef __ACC_CXX_HAVE_ARRAY_NEW
+#undef __ACC_CXX_HAVE_PLACEMENT_NEW
+#undef __ACC_CXX_HAVE_PLACEMENT_DELETE
+
+#if (ACC_CC_BORLANDC && (__BORLANDC__ < 0x0450))
 #elif (ACC_CC_GNUC && (ACC_CC_GNUC < 0x029000ul))
+#  define ACC_CXX_DISABLE_NEW_DELETE private:
+#elif (ACC_CC_MSC && ACC_MM_HUGE)
+#  define ACC_CXX_DISABLE_NEW_DELETE private:
+#elif (ACC_CC_MSC && (_MSC_VER < 1100))
+#elif (ACC_CC_SYMANTECC || ACC_CC_ZORTECHC)
+#elif (ACC_CC_TURBOC)
+#elif (ACC_CC_WATCOMC && (__WATCOMC__ < 1100))
 #else
-#  define __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_NEW \
-        static void* operator new(size_t, void*);
+#  define __ACC_CXX_HAVE_ARRAY_NEW 1
+#endif
+
+#if (__ACC_CXX_HAVE_ARRAY_NEW)
+#  define __ACC_CXX_HAVE_PLACEMENT_NEW 1
+#endif
+
+#if (__ACC_CXX_HAVE_PLACEMENT_NEW)
 #  if (ACC_CC_GNUC >= 0x030000ul)
-#    define __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_DELETE \
-        static void operator delete(void*, void*) ACC_CXX_NOTHROW { }
+#    define __ACC_CXX_HAVE_PLACEMENT_DELETE 1
 #  elif (ACC_CC_INTELC)
-#    define __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_DELETE \
-        static void operator delete(void*, void*) ACC_CXX_NOTHROW { }
+#    define __ACC_CXX_HAVE_PLACEMENT_DELETE 1
 #  elif (ACC_CC_MSC && (_MSC_VER >= 1200))
-#    define __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_DELETE \
-        static void operator delete(void*, void*) ACC_CXX_NOTHROW { }
+#    define __ACC_CXX_HAVE_PLACEMENT_DELETE 1
 #  endif
-#  if !defined(__ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_NEW)
-#    define __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_NEW
-#    undef __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_DELETE
-#  endif
-#  if !defined(__ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_DELETE)
-#    define __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_DELETE
-#  endif
-
-#  define ACC_CXX_DISABLE_NEW_DELETE \
-    private: \
-        static void* operator new(size_t); \
-        static void* operator new[](size_t); \
-    protected: \
-        static void operator delete(void*) ACC_CXX_NOTHROW { } \
-        static void operator delete[](void*) ACC_CXX_NOTHROW { } \
-    private:
-
-#  define ACC_CXX_DISABLE_NEW_DELETE_STRICT \
-    private: \
-        static void* operator new(size_t); \
-        static void* operator new[](size_t); \
-        __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_NEW \
-    protected: \
-        static void operator delete(void*) ACC_CXX_NOTHROW { } \
-        static void operator delete[](void*) ACC_CXX_NOTHROW { } \
-        __ACC_CXX_DISABLE_NEW_DELETE_PLACEMENT_DELETE \
-    private:
-
 #endif
 
 
-#if !defined(ACC_CXX_DISABLE_NEW_DELETE)
+#if !defined(__ACC_CXX_PLACEMENT_NEW) && (__ACC_CXX_HAVE_PLACEMENT_NEW)
+#  define __ACC_CXX_PLACEMENT_NEW \
+            static void* operator new(size_t, void*);
+#endif
+#if !defined(__ACC_CXX_PLACEMENT_DELETE) && (__ACC_CXX_HAVE_PLACEMENT_DELETE)
+#  define __ACC_CXX_PLACEMENT_DELETE \
+            static void operator delete(void*, void*) ACC_CXX_NOTHROW { }
+#endif
+#if !defined(__ACC_CXX_PLACEMENT_NEW)
+#  define __ACC_CXX_PLACEMENT_NEW
+#endif
+#if !defined(__ACC_CXX_PLACEMENT_DELETE)
+#  define __ACC_CXX_PLACEMENT_DELETE
+#endif
+
+
+#if !defined(ACC_CXX_DISABLE_NEW_DELETE) && (defined(new) || defined(delete))
 #  define ACC_CXX_DISABLE_NEW_DELETE private:
 #endif
+
+#if !defined(ACC_CXX_DISABLE_NEW_DELETE) && !(__ACC_CXX_HAVE_ARRAY_NEW)
+/* for old compilers use `protected' instead of `private' */
+#  define ACC_CXX_DISABLE_NEW_DELETE \
+        protected: static void operator delete(void*) ACC_CXX_NOTHROW { } \
+        protected: static void* operator new(size_t); \
+        private:
+#endif
+
+#if !defined(ACC_CXX_DISABLE_NEW_DELETE)
+#  define ACC_CXX_DISABLE_NEW_DELETE \
+        protected: \
+            static void operator delete(void*) ACC_CXX_NOTHROW { } \
+            static void operator delete[](void*) ACC_CXX_NOTHROW { } \
+        private: \
+            static void* operator new(size_t); \
+            static void* operator new[](size_t);
+#  define ACC_CXX_DISABLE_NEW_DELETE_STRICT \
+        protected: \
+            static void operator delete(void*) ACC_CXX_NOTHROW { } \
+            static void operator delete[](void*) ACC_CXX_NOTHROW { } \
+            __ACC_CXX_PLACEMENT_DELETE \
+        private: \
+            static void* operator new(size_t); \
+            static void* operator new[](size_t); \
+            __ACC_CXX_PLACEMENT_NEW
+#endif
+
 #if !defined(ACC_CXX_DISABLE_NEW_DELETE_STRICT)
 #  define ACC_CXX_DISABLE_NEW_DELETE_STRICT ACC_CXX_DISABLE_NEW_DELETE
 #endif
diff --git a/src/acc/acc_lib.h b/src/acc/acc_lib.h
index cfc06ac6..3f35fa0a 100644
--- a/src/acc/acc_lib.h
+++ b/src/acc/acc_lib.h
@@ -245,7 +245,7 @@ typedef struct {
 } acc_rand48_t;
 ACCLIB_EXTERN(void, acc_srand48) (acc_rand48_t* r, acc_uint32l_t seed);
 ACCLIB_EXTERN(acc_uint32l_t, acc_rand48) (acc_rand48_t* r);
-#endif /* defined(acc_uint64l_t) */
+#endif
 
 #if defined(acc_uint64l_t)
 typedef struct {
@@ -253,7 +253,7 @@ typedef struct {
 } acc_rand64_t;
 ACCLIB_EXTERN(void, acc_srand64) (acc_rand64_t* r, acc_uint64l_t seed);
 ACCLIB_EXTERN(acc_uint32l_t, acc_rand64) (acc_rand64_t* r);
-#endif /* defined(acc_uint64l_t) */
+#endif
 
 
 #endif /* already included */
diff --git a/src/acc/acclib/bele.ch b/src/acc/acclib/bele.ch
index 5111b233..22d409f3 100644
--- a/src/acc/acclib/bele.ch
+++ b/src/acc/acclib/bele.ch
@@ -22,28 +22,28 @@
 // FIXME
 **************************************************************************/
 
-ACCLIB_EXTERN(unsigned, acc_get_be16) (const acc_hvoid_p);
-ACCLIB_EXTERN(acc_uint32l_t, acc_get_be24) (const acc_hvoid_p);
-ACCLIB_EXTERN(acc_uint32l_t, acc_get_be32) (const acc_hvoid_p);
+ACCLIB_PUBLIC(unsigned, acc_get_be16) (const acc_hvoid_p);
+ACCLIB_PUBLIC(acc_uint32l_t, acc_get_be24) (const acc_hvoid_p);
+ACCLIB_PUBLIC(acc_uint32l_t, acc_get_be32) (const acc_hvoid_p);
 
-ACCLIB_EXTERN(void, acc_set_be16) (acc_hvoid_p, unsigned v);
-ACCLIB_EXTERN(void, acc_set_be24) (acc_hvoid_p, acc_uint32l_t v);
-ACCLIB_EXTERN(void, acc_set_be32) (acc_hvoid_p, acc_uint32l_t v);
+ACCLIB_PUBLIC(void, acc_set_be16) (acc_hvoid_p, unsigned v);
+ACCLIB_PUBLIC(void, acc_set_be24) (acc_hvoid_p, acc_uint32l_t v);
+ACCLIB_PUBLIC(void, acc_set_be32) (acc_hvoid_p, acc_uint32l_t v);
 
-ACCLIB_EXTERN(unsigned, acc_get_le16) (const acc_hvoid_p);
-ACCLIB_EXTERN(acc_uint32l_t, acc_get_le24) (const acc_hvoid_p);
-ACCLIB_EXTERN(acc_uint32l_t, acc_get_le32) (const acc_hvoid_p);
+ACCLIB_PUBLIC(unsigned, acc_get_le16) (const acc_hvoid_p);
+ACCLIB_PUBLIC(acc_uint32l_t, acc_get_le24) (const acc_hvoid_p);
+ACCLIB_PUBLIC(acc_uint32l_t, acc_get_le32) (const acc_hvoid_p);
 
-ACCLIB_EXTERN(void, acc_set_le16) (acc_hvoid_p, unsigned v);
-ACCLIB_EXTERN(void, acc_set_le24) (acc_hvoid_p, acc_uint32l_t v);
-ACCLIB_EXTERN(void, acc_set_le32) (acc_hvoid_p, acc_uint32l_t v);
+ACCLIB_PUBLIC(void, acc_set_le16) (acc_hvoid_p, unsigned v);
+ACCLIB_PUBLIC(void, acc_set_le24) (acc_hvoid_p, acc_uint32l_t v);
+ACCLIB_PUBLIC(void, acc_set_le32) (acc_hvoid_p, acc_uint32l_t v);
 
 #if defined(acc_uint64l_t)
-ACCLIB_EXTERN(acc_uint64l_t, acc_get_be64) (const acc_hvoid_p);
-ACCLIB_EXTERN(void, acc_set_be64) (acc_hvoid_p, acc_uint64l_t v);
+ACCLIB_PUBLIC(acc_uint64l_t, acc_get_be64) (const acc_hvoid_p);
+ACCLIB_PUBLIC(void, acc_set_be64) (acc_hvoid_p, acc_uint64l_t v);
 
-ACCLIB_EXTERN(acc_uint64l_t, acc_get_le64) (const acc_hvoid_p);
-ACCLIB_EXTERN(void, acc_set_le64) (acc_hvoid_p, acc_uint64l_t v);
+ACCLIB_PUBLIC(acc_uint64l_t, acc_get_le64) (const acc_hvoid_p);
+ACCLIB_PUBLIC(void, acc_set_le64) (acc_hvoid_p, acc_uint64l_t v);
 #endif