What's the minimum version of GCC required to build the latest Vim? Are there any patches to allow one to build it with even older versions of GCC?

Hi,

I maintain Vim packages in my Open Build Service home project, for example here are the packaging files I use to build it for CentOS/Fedora/Scientific Linux https://build.opensuse.org/package/show/home:fusion809/vim-redhat. I would like to build Vim for CentOS 5 and 6, but I cannot presently do this, because the build fails and I think the reason why is that GCC is too old. So I am here to ask what's the minimum version of GCC required to build the latest Vim (so 8.0) and are there any ways to build Vim with an older GCC? The build log (showing the error from building Vim on 64-bit CentOS 6) can be found here, if you're wondering whether it's a bug. 

Thanks for your time,
Brenton

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