On Wed, Jun 15, 2022 at 11:27 AM Chris Johns <ch...@contemporary.net.au> wrote: > > Hi, > > I am trying to build a cross-compiler on FreeBSD with --enable-lto because a > chip vendor is using it when building controller software that is part of a > system. > > The build I am using symlinks gmp, mpfr etc as source so they are built as > part > of the gcc build. > > The mpfr package is reporting ... > > build/mpfr/config.log:configure:17408: error: Link Time Optimisation is not > supported (see config.log for details). > > Should the enable option be passed to these packages?
You shouldn't need --enable-lto, it's effect (adding lto to the set of compiled languages) is already the default. You can use --enable-languages=default,lto to achieve the same effect without getting the mpfr side-effect. > I have assumed the enable option for LTO is for the cross compiler and not the > host gcc? it's for the built GCC, enabling LTO support (but not for enabling building GCC itself with LTO). Richard. > > Thanks > Chris
