[cfe-dev] Pragma message in Clang?

[Michael Spencer]

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