diff --git a/Mk/Uses/cargo.mk b/Mk/Uses/cargo.mk
--- a/Mk/Uses/cargo.mk
+++ b/Mk/Uses/cargo.mk
@@ -139,6 +139,11 @@
 CARGO_ENV+=	RUST_BACKTRACE=1
 .  endif
 
+.  if !defined(LTO_UNSAFE) || (defined(LTO_DISABLE_CHECK) && ${ARCH} == powerpc64) || (defined(LTO_DISABLE_CHECK) && ${ARCH} == riscv64)
+_CARGO_MSG=	"===>   Additional optimization to port applied"
+WITH_LTO=	yes
+.  endif
+
 # Adjust -C target-cpu if -march/-mcpu is set by bsd.cpu.mk
 .  if ${ARCH} == amd64 || ${ARCH} == i386
 RUSTFLAGS+=	${CFLAGS:M-march=*:S/-march=/-C target-cpu=/}
@@ -295,6 +300,9 @@
 # Check that the running kernel has COMPAT_FREEBSD11 required by lang/rust post-ino64
 	@${SETENV} CC="${CC}" OPSYS="${OPSYS}" OSVERSION="${OSVERSION}" WRKDIR="${WRKDIR}" \
 		${SH} ${SCRIPTSDIR}/rust-compat11-canary.sh
+.    if defined(_CARGO_MSG)
+	@${ECHO_MSG} ${_CARGO_MSG}
+.    endif
 	@${ECHO_MSG} "===>   Cargo config:"
 	@${MKDIR} ${WRKDIR}/.cargo
 	@: > ${WRKDIR}/.cargo/config.toml