[Rpm-maint] [rpm-software-management/rpm] Use -flto=auto as a default for _lto_cflags. (#809)

Panu Matilainen notifications at github.com
Tue Aug 13 12:18:30 UTC 2019


...and one more note on the subject. The gcc manual says:

```
           The important thing to keep in mind is that to enable link-time
           optimizations you need to use the GCC driver to perform the link
           step.  GCC automatically performs link-time optimization if any of
           the objects involved were compiled with the -flto command-line
           option.  You can always override the automatic decision to do
           link-time optimization by passing -fno-lto to the link command.
```

So unlike some other things, this doesn't actually need a macro for easy disabling ability, people can just append -fno-lto to the packages where this is needed for whatever reason.

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