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Re: Dealing with compilers that pretend to be GCC
On Jan 30, 2012, at 7:56 AM, Ludovic Courtès wrote:
> Hello,
>
> Chris Lattner <clattner@apple.com> skribis:
>
>> On Jan 20, 2012, at 5:24 PM, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
>>
>>> On 21 January 2012 00:32, Vincent Lefevre wrote:
>>>> On 2012-01-20 23:28:07 +0000, Jonathan Wakely wrote:
>>>>> May I politely suggest that this is the wrong place to complain about
>>>>> other compilers pretending to be GCC :)
>>>>
>>>> I think that's the fault of GCC, which should have defined a macro
>>>> for each extension.
>>>
>>> And what about the fact other compilers haven't defined such a macro
>>> for each extension they implement, whether it comes from GCC or not,
>>> is that GCC's fault too?
>>
>> If fact, some do:
>> http://clang.llvm.org/docs/LanguageExtensions.html#feature_check
>
> That seems like a very useful approach to solve the problem.
>
> The docs say that ‘__has_builtin’ & co. are macros. What do they expand to?
0 or 1.
-Chris