Bug#872738: C++14 issue on power

I forgot to say, the __linux define is missing with -std=c++14 as I showed but I didn't say that explicitely. F.

Bug#872738: C++14 issue on power

For some reason there is no define of __linux on ppc64el : On ppc64el : $ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/powerpc64le-linux-gnu/7/lto-wrapper Target: powerpc64le-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 7.2.0-1'