common/doc/building.md

rev 2693 : 8184338: switch minimum supported gcc version to 4.8

*** 390,404 ****
   Solaris            Oracle Solaris Studio 12.4 (with compiler version 5.13)
   Windows            Microsoft Visual Studio 2013 update 4
  
  ### gcc
  
! The minimum accepted version of gcc is 4.3. Older versions will not be accepted
! by `configure`.
! 
! However, gcc 4.3 is quite old and OpenJDK is not regularly tested on this
! version, so it is recommended to use a more modern gcc.
  
  OpenJDK 9 includes patches that should allow gcc 6 to compile, but this should
  be considered experimental.
  
  In general, any version between these two should be usable.
--- 390,401 ----
   Solaris            Oracle Solaris Studio 12.4 (with compiler version 5.13)
   Windows            Microsoft Visual Studio 2013 update 4
  
  ### gcc
  
! The minimum accepted version of gcc is 4.7. Older versions will generate a warning 
! by `configure` and are unlikely to work.
  
  OpenJDK 9 includes patches that should allow gcc 6 to compile, but this should
  be considered experimental.
  
  In general, any version between these two should be usable.