@@ -56,29 +56,38 @@ about them. The improvements since the 3.5 release include:
suggestion in more cases, and can now successfully recover in more
situations where the suggestion changes how an expression is parsed.
- ...
New Compiler Flags
------------------
The ``-fpic`` option now uses small pic on PowerPC.
The option ....
The __EXCEPTIONS macro
----------------------
``__EXCEPTIONS`` is now defined when landing pads are emitted, not when c++ exceptions are enabled. The two can be different in Objective-C files: If C++ exceptions are disabled but Objective-C exceptions are enabled, landing pads will be emitted. Clang 3.6 is switching the behavior of ``__EXCEPTIONS``. Clang 3.5 confusingly changed the behavior of ``has_feature(cxx_exceptions)``, which used to be set if landing pads were emitted, but is now set if C++ exceptions are enabled. So there are 3 cases:
``__EXCEPTIONS`` is now defined when landing pads are emitted, not when
C++ exceptions are enabled. The two can be different in Objective-C files:
If C++ exceptions are disabled but Objective-C exceptions are enabled,
landing pads will be emitted. Clang 3.6 is switching the behavior of
``__EXCEPTIONS``. Clang 3.5 confusingly changed the behavior of
``has_feature(cxx_exceptions)``, which used to be set if landing pads were
emitted, but is now set if C++ exceptions are enabled. So there are 3 cases:
Clang before 3.5:
``__EXCEPTIONS`` is set if C++ exceptions are enabled, ``cxx_exceptions`` enabled if C++ or ObjC exceptions are enabled
``__EXCEPTIONS`` is set if C++ exceptions are enabled, ``cxx_exceptions``
enabled if C++ or ObjC exceptions are enabled
Clang 3.5:
``__EXCEPTIONS`` is set if C++ exceptions are enabled, ``cxx_exceptions`` enabled if C++ exceptions are enabled
``__EXCEPTIONS`` is set if C++ exceptions are enabled, ``cxx_exceptions``
enabled if C++ exceptions are enabled
Clang 3.6:
``__EXCEPTIONS`` is set if C++ or ObjC exceptions are enabled, ``cxx_exceptions`` enabled if C++ exceptions are enabled
``__EXCEPTIONS`` is set if C++ or ObjC exceptions are enabled,
``cxx_exceptions`` enabled if C++ exceptions are enabled
To reliably test if C++ exceptions are enabled, use ``__EXCEPTIONS && __has_feature(cxx_exceptions)``, else things won't work in all versions of clang in Objective-C++ files.
To reliably test if C++ exceptions are enabled, use
``__EXCEPTIONS && __has_feature(cxx_exceptions)``, else things won't work in
all versions of Clang in Objective-C++ files.
New Pragmas in Clang
@@ -148,6 +157,7 @@ C++ Language Changes in Clang
- Clang will put individual ``.init_array/.ctors`` sections in
comdats, reducing code duplication and speeding up startup.
C++17 Feature Support
^^^^^^^^^^^^^^^^^^^^^
@@ -178,20 +188,10 @@ For more details on C++ feature support, see
`the C++ status page <http://clang.llvm.org/cxx_status.html>`_.
Objective-C Language Changes in Clang
-------------------------------------
...
OpenCL C Language Changes in Clang
----------------------------------
...
OpenMP Language Changes in Clang
--------------------------------
Clang 3.6 contains codegen for many individual OpenMP pragmas, but combinations are not completed as yet.
Clang 3.6 contains codegen for many individual OpenMP pragmas, but combinations are not completed yet.
We plan to continue codegen code drop aiming for completion in 3.7. Please see this link for up-to-date
