Hi, Chris Lattner <clatt...@apple.com> skribis:
> On Jan 30, 2012, at 7:56 AM, Ludovic Courtès wrote: > >> Hello, >> >> Chris Lattner <clatt...@apple.com> skribis: >> >>> On Jan 20, 2012, at 5:24 PM, Jonathan Wakely <jwakely....@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. I understand. To put it another way, how are they defined? Thanks, Ludo’.
