GCC 7 on Solaris 11.4

How to get gcc-7 on Solaris 11.4?

root@solaris:~# pkg install gcc-7
           Packages to install: 14
           Mediators to change:  1
            Services to change:  1
       Create boot environment: No
Create backup boot environment: No

DOWNLOAD                      PKGS         FILES    XFER (MB)   SPEED
Completed                    14/14     1822/1822  332.0/332.0  423k/s

PHASE                                          ITEMS
Installing new actions                     2253/2253
Updating package state database                 Done 
Updating package cache                           0/0 
Updating image state                            Done 
Creating fast lookup database                   Done 
Updating package cache                           1/1 
root@solaris:~# 

root@solaris:~# gcc --version
gcc (GCC) 7.3.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

root@solaris:~# 

Older versions are available as well.