On 07/04/2017 12:35, Toebs Douglass wrote: > On 07/04/17 00:54, Jonathan Wakely wrote: > >> On 6 April 2017 at 23:26, Toebs Douglass wrote: >> >>> Now, I may be wrong, but it seems to me when a new GCC is being >>> released, it will be compiled for sure with the most recently published >>> glibc, libmpfr, libgmp and libmpc. Similarly, it will be created with >>> the most recently release binutils. >> >> No, not necessarily. >> >> When GCC is released it's compiled by users, and so will use whatever >> glibc a user has on their machine. > > I may be wrong, but I think generally people using a distro will use and > only use the compiler and glibc which came with the distro. > > It is unusual for a person using a distro to compile a new GCC or glibc. On Ubuntu, it's possible to have several versions of GCC coexist. (For example, I use 4.8.x, 5.x, and 6.x on the same system.) I just installed the packages, of course. https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test Regards.