Index: Mk/bsd.port.mk
===================================================================
--- Mk/bsd.port.mk
+++ Mk/bsd.port.mk
@@ -2106,6 +2106,7 @@
 .endif
 
 .include "${PORTSDIR}/Mk/bsd.ccache.mk"
+.include "${PORTSDIR}/Mk/bsd.sccache.mk"
 
 .if !make(makesum)
 FETCH_ENV?=		SSL_NO_VERIFY_PEER=1 SSL_NO_VERIFY_HOSTNAME=1
Index: Mk/bsd.sccache.mk
===================================================================
--- /dev/null
+++ Mk/bsd.sccache.mk
@@ -0,0 +1,43 @@
+# Add wrapper for sccache. Note the binary needs to be provided
+# by the system, as to avoid a chicken-egg problem in lang/rust
+# which can benefit greatly from this. So other than ccache, we
+# won't pull in a dpeendency on the port itself.
+#
+# User settable:
+#
+# - SCCACHE_DIR		- path to the sccache directory
+# - SCCACHE_BIN		- path to the sccache binary - defaults to ${SCCACHE_DIR}/sccache
+#                         this makes it easy to inject sccache into poudriere
+# - SCCACHE_SIZE	- size of the cache - defaults to 16G
+#
+# Usable by ports:
+#
+# - SCCACHE_ENABLED - set if SCCACHE is usable
+# - NO_SCCACHE      - disable sccache for the port
+#
+#
+
+COMMANDS_Include_MAINTAINER=	portmgr@FreeBSD.org
+
+.if !defined(_SCCACHE_INCLUDED)
+_SCCACHE_INCLUDED=	yes
+_SCCACHE_SIZE_DEFAULT=	16G
+
+.  if defined(SCCACHE_DIR)
+SCCACHE_BIN?=		${SCCACHE_DIR}/sccache
+.  endif
+
+.  if !defined(NO_SCCACHE)
+.    if defined(SCCACHE_BIN) && exists(${SCCACHE_BIN})
+SCCACHE_ENABLED=	y
+SCCACHE_SIZE?=		${_SCCACHE_SIZE_DEFAULT}
+
+_SCCACHE_ENV=		RUSTC_WRAPPER="${SCCACHE_BIN}" \
+			SCCACHE_DIR="${SCCACHE_DIR}" \
+			SCCACHE_SIZE="${SCCACHE_SIZE}"
+
+CONFIGURE_ENV+=		${_SCCACHE_ENV}
+MAKE_ENV+=		${_SCCACHE_ENV}
+.    endif
+.  endif
+.endif
Index: lang/rust/Makefile
===================================================================
--- lang/rust/Makefile
+++ lang/rust/Makefile
@@ -161,6 +161,9 @@
 	@${ECHO_CMD} 'target=[${_RUST_TARGETS:@.target.@"${.target.}"@:ts,}]' >> ${WRKSRC}/config.toml
 	@${ECHO_CMD} 'cargo="${WRKDIR}/bootstrap/bin/cargo"' >> ${WRKSRC}/config.toml
 	@${ECHO_CMD} 'rustc="${WRKDIR}/bootstrap/bin/rustc"' >> ${WRKSRC}/config.toml
+.if defined(SCCACHE_ENABLED)
+	@${ECHO_CMD} 'rustc-wrapper="${SCCACHE_BIN}"' >> ${WRKSRC}/config.toml
+.endif
 	@${ECHO_CMD} 'tools=[${_RUST_TOOLS:@.tool.@"${.tool.}"@:ts,}]' >> ${WRKSRC}/config.toml
 	@${ECHO_CMD} '[install]' >> ${WRKSRC}/config.toml
 	@${ECHO_CMD} 'prefix="${PREFIX}"' >> ${WRKSRC}/config.toml
@@ -221,6 +224,18 @@
 	@${ECHO_CMD} 'missing-tools=true' >> ${WRKSRC}/config.toml
 .endif
 
+.if defined(SCCACHE_ENABLE)
+EXTRA_PATCHES+=	${FILES_DIR}/extra-patch-sccache
+.endif
+
+pre-configure:
+.if defined(SCCACHE_ENABLE)
+	${REINPLACE_CMD} -e 's|%%SCCACHE_DIR%%|${SCCACHE_DIR}|' \
+		         -e 's|%%SCCACHE_BIN%%|${SCCACHE_BIN}|' \
+			 -e 's|%%SCCACHE_SIZE%%|${SCCACHE_SIZE}|' \
+			 ${CONFIGURE_WRKSRC}/src/bootstrap/builder.rs
+.endif
+
 do-build:
 	@cd ${WRKSRC} && \
 		${SETENV} ${MAKE_ENV} ${PYTHON_CMD} x.py build --jobs=${MAKE_JOBS_NUMBER}
Index: lang/rust/files/extra-patch-sccache
===================================================================
--- /dev/null
+++ lang/rust/files/extra-patch-sccache
@@ -0,0 +1,12 @@
+--- src/bootstrap/builder.rs.orig	2021-07-20 13:51:10 UTC
++++ src/bootstrap/builder.rs
+@@ -1068,6 +1068,9 @@ impl<'a> Builder<'a> {
+         if cmd != "clippy" {
+             cargo.env("RUSTC", self.out.join("bootstrap/debug/rustc"));
+         }
++        cargo.env("RUSTC_WRAPPER", "%%SCCACHE_BIN%%");
++        cargo.env("SCCACHE_DIR", "%%SCCACHE_DIR%%");
++        cargo.env("SCCACHE_CACHE_SIZE", "%%SCCACHE_SIZE%%");
+ 
+         // Dealing with rpath here is a little special, so let's go into some
+         // detail. First off, `-rpath` is a linker option on Unix platforms