[Bug lto/69003] [4.9/5/6 Regression] Undefined reference with gcc -r incremental linking

[sirl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69003

--- Comment #6 from Franz Sirl <sirl at gcc dot gnu.org> ---
Yes, this fixes the testcase and also the real application it was derived from
here. No testsuite regressions on x86_64 either.