Comment 5 for bug 1497663

@ginggs g++-4.9.real belongs to package "hardening-wrapper", which is not installed by default nowadays. I installed it and then it works.

ls results before installing "hardening-wrapper"

$ ls -l /usr/bin/gcc*
lrwxrwxrwx 1 root root 5 Aug 1 21:32 /usr/bin/gcc -> gcc-5
-rwxr-xr-x 1 root root 837944 Aug 27 00:25 /usr/bin/gcc-4.9
-rwxr-xr-x 1 root root 886968 Sep 15 22:34 /usr/bin/gcc-5
lrwxrwxrwx 1 root root 8 Aug 1 21:32 /usr/bin/gcc-ar -> gcc-ar-5
-rwxr-xr-x 1 root root 26968 Aug 27 00:25 /usr/bin/gcc-ar-4.9
-rwxr-xr-x 1 root root 26976 Sep 15 22:34 /usr/bin/gcc-ar-5
lrwxrwxrwx 1 root root 8 Aug 1 21:32 /usr/bin/gcc-nm -> gcc-nm-5
-rwxr-xr-x 1 root root 26968 Aug 27 00:25 /usr/bin/gcc-nm-4.9
-rwxr-xr-x 1 root root 26976 Sep 15 22:34 /usr/bin/gcc-nm-5
lrwxrwxrwx 1 root root 12 Aug 1 21:32 /usr/bin/gcc-ranlib -> gcc-ranlib-5
-rwxr-xr-x 1 root root 26968 Aug 27 00:25 /usr/bin/gcc-ranlib-4.9
-rwxr-xr-x 1 root root 26976 Sep 15 22:34 /usr/bin/gcc-ranlib-5

$ ls -l /usr/bin/g++*
lrwxrwxrwx 1 root root 5 Aug 1 21:32 /usr/bin/g++ -> g++-5
-rwxr-xr-x 1 root root 837944 Aug 27 00:16 /usr/bin/g++-4.9
-rwxr-xr-x 1 root root 886968 Sep 15 21:40 /usr/bin/g++-5
-rwxr-xr-x 1 root root 288 Sep 28 2014 /usr/bin/g++-libc++