On 20/09/2013 03:04, Karl Millar wrote:
Romain,
Can you use int64_t and uint_t64 instead? IMHO that would be more useful
than long long anyway.
'Writing R Extensions' does say
'Do be very careful with passing arguments between R, C and FORTRAN
code. In particular, long in C will be 32-bit on some R platforms
(including 64-bit Windows), but 64-bit on most modern Unix and Linux
platforms. It is rather unlikely that the use of long in C code has been
thought through: if you need a longer type than int you should use a
configure test for a C99 type such as int_fast64_t (and failing that,
long long 42) and typedef your own type to be long or long long, or use
another suitable type (such as size_t).
Note that int64_t is not portable, even in C99, since its implementation
is optional.
On 20/09/2013 01:31, Patrick Welche wrote:
>
> Can you also add -std=c++0x or is that considered as bad as adding
> -Wno-long-long?
That is not portable. It is g++ specific and AFAIR not accepted by the
version of g++ used on OS X (which dates from 2007).
Karl
On Sep 19, 2013 5:33 PM, "Patrick Welche" <pr...@cam.ac.uk> wrote:
On Fri, Sep 20, 2013 at 12:51:52AM +0200, rom...@r-enthusiasts.com wrote:
In Rcpp we'd like to do something useful for types such as long long
and unsigned long long.
...
But apparently this is still not enough and on some versions of gcc
(e.g. 4.7 something), -pedantic still generates the warnings unless
we also use -Wno-long-long
Can you also add -std=c++0x or is that considered as bad as adding
-Wno-long-long?
(and why not use autoconf's AC_TYPE_LONG_LONG_INT and
AC_TYPE_UNSIGNED_LONG_LONG_INT for the tests?)
Cheers,
Patrick
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