[lfs-support] Ensuring a generic x86_64 build
paulgrogers at fastmail.fm
Mon Sep 18 15:20:02 PDT 2017
> I noticed this note about GMP:
> "The default settings of GMP produce libraries optimized for the host
> Using the default configure settings in the summary of build options I
> see "Host type: skylake-pc-linux-gnu". I then see gcc is using
> "-mtune=skylake" when compiling the GMP library. Now if I use
> configfsf.guess as mentioned in the LFS book, it will build with "Host
> type: x86_64-pc-linux-gnu". So I've made a note to recompile GMP when
> I move it to the older system.
Isn't that a PITA? But check out the "fat" option.
> Beyond GMP, is anyone aware of other LFS packages which, when using
> the default compilation options, could lead to binaries that are
> tightly coupled to the host build's processor? I'd like my build to
> be as generic as possible so that it can run on any other x86_64
I do too, just got into trouble over this and had to rebuild.
Apparently that is the only package (so far!) to be so presumptuous.
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