On 7/27/2015 10:36 AM, Jeffrey Walton wrote:
On Mon, Jul 27, 2015 at 9:48 AM, Edward Diener
<eldlistmailingz@xxxxxxxxxxxxxx> wrote:
On 7/27/2015 4:34 AM, Jonathan Wakely wrote:
On 27 July 2015 at 05:17, Edward Diener wrote:
Try
#if defined(__GXX_EXPERIMENTAL_CXX0X__) || (__cplusplus >= 201103L)
// C++11 is in effect
#endif
GCC 4.8 defines __cplusplus to the correct YYYYMMDD value so this is
not necessary.
I meant it as a general solution for any version of gcc. It is what Boost
config uses.
__GXX_EXPERIMENTAL_CXX0X breaks on Apple platforms and some Clang
based gear. Been there, done that....
I do say "I meant it as a general solution for any version of gcc."
Boost detects clang, and any other gcc derivative, separately from gcc,
so the code I presented has nothing to do with clang, since it is in a
header file where the compiler is known to be gcc. I agree that if you
could be compiling for clang or another gcc derivative compiler the code
I presented may not by itself be enough if that compiler either defined
__GXX_EXPERIMENTAL_CXX0X__ when C++11 support is not implemented or if
that compiler has some other specific way of indicating C++11 support.
if __GXX_EXPERIMENTAL_CXX0X is defined on Apple platforms for gcc when
C++11 is not supported I would definitely like to know more about that
scenario.
