[Bug 51051] Build fails when LTO is enabled

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51051

--- Comment #10 from Rafał Mużyło  ---
Unless ebuild enforces it differently (my reading of the build says it's not
the case here), portage will use whatever compiler is set as default unless the
user has custom settings for the package.

So, for most people on Gentoo, unless they've set 'mingw' useflag and/or set
their default compiler to clang, it's still non-PE build with gcc. LTO is an
explicit user's choice, as nothing about it is in the ebuild.