[Bug binutils/27206] .symver overrides .weak

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27206

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Tom Kacvinsky from comment #6)
> For compatibility reasons, I want to update my automated build machine, but
> build GCC and auxiliary support libraries in such a fashion that we can
> target older Linux distributions That is, build on a machine with a newer
> glibc, but still be able to run the resulting binaries on a system with an
> older glibc, which is reverse of building on an older system and running on
> a newer system.
> 

You can use a cross compiler to that.  Check scripts/build-many-glibcs.py
in glibc source to see how to build a toolchain with a different glibc.

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