File: Allow-to-override-rust-LTO-flag.patch

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From: Mike Hommey <mh@glandium.org>
Date: Sun, 14 Aug 2022 15:05:23 +0900
Subject: Allow to override rust LTO flag

---
 config/makefiles/rust.mk | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/config/makefiles/rust.mk b/config/makefiles/rust.mk
index ba024e8..4621b2d 100644
--- a/config/makefiles/rust.mk
+++ b/config/makefiles/rust.mk
@@ -101,8 +101,9 @@ ifndef rustflags_sancov
 # Never enable when coverage is enabled to work around https://github.com/rust-lang/rust/issues/90045.
 ifndef MOZ_CODE_COVERAGE
 ifeq (,$(findstring gkrust_gtest,$(RUST_LIBRARY_FILE)))
-cargo_rustc_flags += -Clto$(if $(filter full,$(MOZ_LTO_RUST_CROSS)),=fat)
+cargo_rustc_flags += $(or $(DEBIAN_RUST_LTO),-Clto$(if $(filter full,$(MOZ_LTO_RUST_CROSS)),=fat))
 endif
+ifneq (-Clto=off,$(DEBIAN_RUST_LTO))
 # We need -Cembed-bitcode=yes for all crates when using -Clto.
 RUSTFLAGS += -Cembed-bitcode=yes
 endif
@@ -110,6 +111,7 @@ endif
 endif
 endif
 endif
+endif
 
 ifdef CARGO_INCREMENTAL
 export CARGO_INCREMENTAL