Bug#914688: Default defines discrepancy

[Adrian Bunk <bunk@debian.org>]

Control: forwaded -1 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28314

On Mon, Nov 26, 2018 at 12:28:28PM +0000, Dimitri John Ledkov wrote:
> xnox@diamond:~$ g++ -std=c++14 -dM -E -x c++ - < /dev/null | grep linux
> #define __linux__ 1
> #define __gnu_linux__ 1
> 
> xnox@diamond:~$ g++ -std=gnu++14 -dM -E -x c++ - < /dev/null | grep linux
> #define __linux 1
> #define __linux__ 1
> #define __gnu_linux__ 1
> #define linux 1
> 
> The same is not observed on other architectures. And for some reason,
> boost cares about "linux" or "__linux", and is not sensitive to
> "__linux__" nor "__gnu_linux__".

https://bugs.launchpad.net/ubuntu/+source/gcc-4.9/+bug/1349907/comments/1

> Regards,
> 
> Dimitri.

cu
Adrian

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