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. -Chris
