Hi. On Fri, Feb 23, 2018 at 05:57:59PM +0000, Bas Ali wrote: > > Hi, > Just to need help for what concerning to build or/and install an older GCC on > a new Debian Distro (e.g 8.8 or 9.3) > The goal is to be able to compile and build binaries on the New Debian with > an older GCC to keep backcompatibility of binaries program previously built > on Debian 7 (32bits Wheezy) using the built-in GCC (4.7.2). Ideally the two > binaries built from a Debian 7 32bits and from Debian 8 64bits will be the > same byte a byte.
That could be much more complex than using old GCC. These guys - [1] - are trying to solve much easier problem - and they aren't there yet. > At this moment I know that it possible (but maybe not the good solution ?) to > build a 4.7.2 GCC source with the Built-in GCC of a Debian 8.8 (64bits > Jessie) but it appears that for > 4.5 GCC there is a need to build too other > packages (MPC, MPFR,..) separately (using some option to built on good > directory). Being lazy, I solve such problems with good old chroot. I mean, why go into all this trouble by compiling a toolchain from the source if someone did it already. You need something built for Debian 7 i386? Make a chroot of Debian 7 i386 and build you binaries there. Making chroot by hand sounds too complex? Use LXC, they have a nice easy way to set up pretty much any major Linux distribution in a container. [1] https://wiki.debian.org/ReproducibleBuilds Reco
