[patch][libc++]using some undeclared functions with -std=c++98, -std=c++03 or -ansi

[David Chisnall]

On 23 Nov 2012, at 21:27, Dimitry Andric wrote:

> Note there are also other problems when compiling libc++ with -std=c++98
> and -std=c++03, such as complaints about namespacing and such.  I am not
> entirely sure libc++ is fully supported yet under those restrictions. :)

In theory, the libc++ headers that are part of the C++03 spec (i.e. not things like <stdatomic>) should work in C++98 / C++03 mode, however the implementation in libc++ must be compiled in C++11 mode.

To upstream this patch, the __LONG_LONG_SUPPORTED flag should be unconditionally set for non-FreeBSD flags in the __config file in libc++.  This will have no functionality change on other platforms.

David