installing crosstool-ng on fedora25 , kernel 4.8.6, crosstool-ng 1.22.0

1. cd crosstool-ng

    ./configure --enable-local

   make

   make install

2. ./ct-ng menuconfig

3. ./ct-ng build

    note:

    please replace the four files in crosstool-ng/.build/src/gcc-5.2.0/gcc/cp/,  Make-language.in, cfns.gperf, cfns.h , execpt.c,

    as mentioned in link

   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69959

   and

   https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=233720