[Rcpp-devel] [PATCH] Be more liberal in accepting pre-processor defines for 64-bit HAS_LONG_LONG

[Simon Zehnder]

Would possibly something like

defined(__clang__) && defined(__cplusplus) && (__cplusplus == 201103L)
defined(__clang__) && defined(__STDC_VERSION__) && (__STDC_VERSION__ == 201112L)

do? The values given by g++ and clang++ to __cplusplus in C++11 mode match, as well as the values given by gcc and clang to __STDC_VERSION__ in C11 mode.

Here is also a commonly used site for search: http://sourceforge.net/p/predef/wiki/Home/

 
On Sep 14, 2013, at 9:08 PM, Dirk Eddelbuettel <edd at debian.org> wrote:

> 
> On 11 September 2013 at 19:05, Murray Stokely wrote:
> | The default llvm/clang compiler on MacOS X 10.8 doesn't get 64-bit support with
> | Rcpp because compilers.h is specifically looking for -std=c++0x as is required
> | by some versions of gcc.
> | 
> | This is overly restrictive as e.g. __LP64__ platforms with _LONG_LONG_MAX set
> | will also certainly have a suitable long long type.
> 
> __LP64__ is the opposite, and too generous. It gets eg turned on by my
> default (non -std=c++0x) build with g++.  
> 
> Per  http://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html it seems
> __LP64__ is a standard GNU extension.
> 
> So I think we need something better. Is there something that is true IFF both
> clang and c++11 are selected?
> 
> Dirk
> 
> | Patch attached or at :
> | 
> | http://www.stokely.org/patches/compiler.int64.diff
> | 
> |       - Murray
> | xuntyped binary data, compiler.int64 [Click mouse-2 to save to a file]
> | _______________________________________________
> | Rcpp-devel mailing list
> | Rcpp-devel at lists.r-forge.r-project.org
> | https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
> -- 
> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
> _______________________________________________
> Rcpp-devel mailing list
> Rcpp-devel at lists.r-forge.r-project.org
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel