James Le Cuirot <chewi@gentoo.org> writes:

Signed-off-by: James Le Cuirot <chewi@gentoo.org>
---
eclass/cargo.eclass | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/eclass/cargo.eclass b/eclass/cargo.eclass
index 44d3f7ee31f59..9f0bffee0e048 100644
--- a/eclass/cargo.eclass
+++ b/eclass/cargo.eclass
@@ -532,7 +532,16 @@ cargo_src_configure() {
# host and target host respectively. Ensure these are set consistently between
# Cargo invocations, otherwise rebuilds will occur.
cargo_env() {
+ # Shadow flag variables so that filtering below remains local.
+ local flag
+ for flag in $(all-flag-vars); do
+ local -x "${flag}=${!flag}"
+ done
+
+ # Rust extensions are incompatible with C/C++ LTO compiler see e.g.
+ # https://bugs.gentoo.org/910220
filter-lto
+

Maybe mention in the commit message that this is what we do for
distutils-r1 too.

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