Pass `-Db_lto=false` globally to force-disable appending `-flto`
in projects that default to it. In Gentoo, users enable LTO via setting `*FLAGS` manually.

If a package really needs to pass `-Db_lto=true` because the build
system enables some custom logic based on it, `tc-is-lto` can be used
to determine whether LTO is enabled, and then `-Db_lto=true` can be
passed explicitly by the ebuild.

Signed-off-by: Michał Górny <mgorny@gentoo.org>
---
eclass/meson.eclass | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/eclass/meson.eclass b/eclass/meson.eclass
index f7cf8a0722ba..83bbcba40302 100644
--- a/eclass/meson.eclass
+++ b/eclass/meson.eclass
@@ -334,6 +334,10 @@ meson_src_configure() {
# It's Gentoo policy to not have builds die on blanket -Werror, as it's
# an upstream development matter. bug #754279.
-Dwerror=false
+
+ # Prevent projects from enabling LTO by default. In Gentoo, LTO is
+ # enabled via setting *FLAGS appropriately.
+ -Db_lto=false
)

if [[ -n ${EMESON_BUILDTYPE} ]]; then
--
2.43.0

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)