[cfe-dev] Pragma message in Clang?

[Michael Spencer]

On Sun, Sep 26, 2010 at 9:12 AM, Matt Joiner <anacrolix at gmail.com> wrote:
> Thanks very much! I'll be watching the trunk with special interest.
>
> On Sun, Sep 26, 2010 at 10:42 PM, Michael Spencer <bigcheesegs at gmail.com> wrote:
>> On Sun, Sep 26, 2010 at 8:25 AM, Matt Joiner <anacrolix at gmail.com> wrote:
>>> It does, enabling it however seems to drop recognition (I assume C99
>>> is out the window) of _Bool:
>>>
>>> ./cpfs.h(27) :  error: unknown type name '_Bool'
>>>
>>> subprocess.CalledProcessError: Command '['clang', '-c', 'bitmap.c',
>>> '-o', '/tmp/bitmap.c.o.mbECeS', '-fms-extensions', '-Winline',
>>> '-Wshadow', '-Wextra', '-Wmissing-format-attribute', '-Wall',
>>> '-Wfloat-equal', '-fdiagnostics-show-option',
>>> '-Werror-implicit-function-declaration', '-Werror=return-type',
>>> '-fno-exceptions', '-std=gnu99', '-D_GNU_SOURCE',
>>> '-D_FILE_OFFSET_BITS=64', '-DCPFS_SIMD_ALIGNED', '-DCPFS_USE_SSSE3',
>>> '-DFUSE_USE_VERSION=28', '-O3', '-g', '-DNDEBUG',
>>> '-DCPFS_LOG_LEVEL=WARNING']' returned non-zero exit status 1
>>>
>>> I don't imagine this is intentional, or -fms-extensions is sneakily
>>> switching language to C++, or clobbering the C standard in use.
>>
>> The reason for this is because MSVC doesn't support _Bool and actually
>> typedefs it in some headers. I however would like a way for _Bool to
>> be used with -fms-extensions, but it would require special case code.
>>
>> As for the pragma, I assumed it was MSVC only. Adding it to
>> non-ms-extensions is trivial. I'll fix it today, just need to add
>> support for not requiring parens.
>>
>> - Michael Spencer
>>
>>> On Sun, Sep 26, 2010 at 9:50 PM, Francois Pichet <pichet2000 at gmail.com> wrote:
>>>> clang implements #pragma message but it is currently only enabled in
>>>> Microsoft mode (-fms-extensions).
>>>>
>>>> Since GCC also support it, it would make sense to enable it by default.
>>>>
>>>> On Sun, Sep 26, 2010 at 7:37 AM, Matt Joiner <anacrolix at gmail.com> wrote:
>>>>> What's Clang's equivalent to `#pragma message` as used in [GCC][1] and
>>>>> [MSVC][2]?
>>>>>
>>>>>  [1]: http://gcc.gnu.org/onlinedocs/gcc/Diagnostic-Pragmas.html#Diagnostic-Pragmas
>>>>>  [2]: http://msdn.microsoft.com/en-us/library/x7dkzch2.aspx
>>
>

Patch attached. Please verify.

- Michael Spencer
-------------- next part --------------
A non-text attachment was scrubbed...
Name: lexer-gcc-pragma-message.patch
Type: application/octet-stream
Size: 3815 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20100926/a4ae6d22/attachment.obj>