diff --git a/Mk/Uses/cargo.mk b/Mk/Uses/cargo.mk
index 987818215665..2e361f771716 100644
--- a/Mk/Uses/cargo.mk
+++ b/Mk/Uses/cargo.mk
@@ -1,363 +1,368 @@
 # This file contains logic to ease porting of Rust packages or
 # binaries using the `cargo` command.
 #
 # Feature:	cargo
 # Usage:	USES=cargo
 # Valid ARGS:	none
 #
 # MAINTAINER: rust@FreeBSD.org
 
 .if !defined(_INCLUDE_USES_CARGO_MK)
 _INCLUDE_USES_CARGO_MK=	yes
 
 .if !empty(cargo_ARGS)
 IGNORE+=	USES=cargo takes no arguments
 .endif
 
 .sinclude "${MASTERDIR}/Makefile.crates"
 
 # List of static dependencies.  The format is cratename-version.
 # CARGO_CRATES will be downloaded from MASTER_SITE_CRATESIO.
 CARGO_CRATES?=
 
 # List of features to build (space separated list).
 # Use special token --no-default-features to disable default
 # features by passing it to cargo build/install/test.
 CARGO_FEATURES?=
 
 # Name of the local directory for vendoring crates.
 CARGO_VENDOR_DIR?=	${WRKSRC}/cargo-crates
 
 # Default path for cargo manifest.
 CARGO_CARGOTOML?=	${WRKSRC}/Cargo.toml
 CARGO_CARGOLOCK?=	${WRKSRC}/Cargo.lock
 
 # Save crates inside ${DISTDIR}/rust/crates by default.
 CARGO_DIST_SUBDIR?=	rust/crates
 
 # Generate list of DISTFILES.
 # Prefer canonical file extension .crate going forward
 .if make(makesum)
 CARGO_CRATE_EXT=	.crate
 .else
 # If there is a rust/crates/*.tar.gz in distinfo keep using the old
 # extension.  We need to delay eval until the last moment for
 # DISTINFO_FILE.  We cache the command output to avoid multiple
 # slow grep runs for every CARGO_CRATE_EXT access.
 CARGO_CRATE_EXT=	${defined(_CARGO_CRATE_EXT_CACHE):?${_CARGO_CRATE_EXT_CACHE}:${:!if ${GREP} -q '\(${CARGO_DIST_SUBDIR}/.*\.tar\.gz\)' "${DISTINFO_FILE}" 2>/dev/null; then ${ECHO_CMD} .tar.gz; else ${ECHO_CMD} .crate; fi!:_=_CARGO_CRATE_EXT_CACHE}}
 .endif
 # enumerate crates for unqiue and sane distfile group names
 _CARGO_CRATES:=	${empty(CARGO_CRATES):?:${CARGO_CRATES:range:@i@$i ${CARGO_CRATES:[$i]}@}}
 # split up crates into (index, crate, name, version) 4-tuples
 _CARGO_CRATES:=	${_CARGO_CRATES:C/^([-_a-zA-Z0-9]+)-([0-9].*)/\0 \1 \2/}
 .for _index _crate _name _version in ${_CARGO_CRATES}
 # Resolving CRATESIO alias is very inefficient with many MASTER_SITES, consume MASTER_SITE_CRATESIO directly
 MASTER_SITES+=	${MASTER_SITE_CRATESIO:S,%SUBDIR%,${_name}/${_version},:S,$,:_cargo_${_index},}
 DISTFILES+=	${CARGO_DIST_SUBDIR}/${_crate}${CARGO_CRATE_EXT}:_cargo_${_index}
 .endfor
 
 # Build dependencies.
 
 CARGO_BUILDDEP?=	yes
 .if ${CARGO_BUILDDEP:tl} == "yes"
 BUILD_DEPENDS+=	${RUST_DEFAULT}>=1.55.0:lang/${RUST_DEFAULT}
 .endif
 
 # Location of cargo binary (default to lang/rust's Cargo binary)
 CARGO_CARGO_BIN?=	${LOCALBASE}/bin/cargo
 
 # Location of the cargo output directory.
 CARGO_TARGET_DIR?=	${WRKDIR}/target
 
+# Default target platform (affects some RUSTFLAGS if passed)
+CARGO_BUILD_TARGET?=	${ARCH:S/amd64/x86_64/:S/i386/i686/}-unknown-${OPSYS:tl}
+
 # Environment for cargo
 #  - CARGO_HOME: local cache of the registry index
 #  - CARGO_BUILD_JOBS: configure number of jobs to run
 #  - CARGO_TARGET_DIR: location of where to place all generated artifacts
 #  - RUST_BACKTRACE: produce backtraces when something in the build panics
 #  - RUSTC: path of rustc binary (default to lang/rust)
 #  - RUSTDOC: path of rustdoc binary (default to lang/rust)
 #  - RUSTFLAGS: custom flags to pass to all compiler invocations that Cargo performs
 CARGO_ENV+= \
 	CARGO_HOME=${WRKDIR}/cargo-home \
 	CARGO_BUILD_JOBS=${MAKE_JOBS_NUMBER} \
+	CARGO_BUILD_TARGET=${CARGO_BUILD_TARGET} \
 	CARGO_TARGET_DIR=${CARGO_TARGET_DIR} \
+	CARGO_TARGET_${CARGO_BUILD_TARGET:S/-/_/g:tu}_LINKER="${CC}" \
 	RUST_BACKTRACE=1 \
 	RUSTC=${LOCALBASE}/bin/rustc \
 	RUSTDOC=${LOCALBASE}/bin/rustdoc \
-	RUSTFLAGS="${RUSTFLAGS} -C linker=${CC:Q} ${LDFLAGS:C/.+/-C link-arg=&/}"
+	RUSTFLAGS="${RUSTFLAGS} ${LDFLAGS:C/.+/-C link-arg=&/}"
 
 # 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=/}
 .elif ${ARCH:Mpowerpc64*}
 RUSTFLAGS+=	${CFLAGS:M-mcpu=*:S/-mcpu=/-C target-cpu=/:S/power/pwr/}
 .else
 RUSTFLAGS+=	${CFLAGS:M-mcpu=*:S/-mcpu=/-C target-cpu=/}
 .endif
 
 .if defined(PPC_ABI) && ${PPC_ABI} == ELFv1
 USE_GCC?=	yes
 STRIP_CMD=	${LOCALBASE}/bin/strip # unsupported e_type with base strip
 .endif
 
 # Helper to shorten cargo calls.
 CARGO_CARGO_RUN= \
 	cd ${WRKSRC} && ${SETENV} ${MAKE_ENV} ${CARGO_ENV} \
 		${CARGO_CARGO_BIN}
 
 # User arguments for cargo targets.
 CARGO_BUILD_ARGS?=
 CARGO_INSTALL_ARGS?=
 CARGO_INSTALL_PATH?=	.
 CARGO_TEST_ARGS?=
 CARGO_UPDATE_ARGS?=
 
 # Use module targets ?
 CARGO_BUILD?=	yes
 CARGO_CONFIGURE?=	yes
 CARGO_INSTALL?=	yes
 CARGO_TEST?=	yes
 
 # Set CARGO_USE_GIT{HUB,LAB} to yes if your application requires
 # some dependencies from git repositories hosted on GitHub or
 # GitLab instances.  All Cargo.toml files will be patched to point
 # to the right offline sources based on what is defined in
 # {GH,GL}_TUPLE.  This makes sure that cargo does not attempt to
 # access the network during the build.
 CARGO_USE_GITHUB?=	no
 CARGO_USE_GITLAB?=	no
 
 # rustc stashes intermediary files in TMPDIR (default /tmp) which
 # might cause issues for users that for some reason space limit
 # their /tmp.  WRKDIR should have plenty of space.
 # Allow users and ports to still overwrite it.
 .if ${TMPDIR:U/tmp} == /tmp
 TMPDIR=		${WRKDIR}
 .endif
 
 # Manage crate features.
 .if !empty(CARGO_FEATURES:M--no-default-features)
 CARGO_BUILD_ARGS+=	--no-default-features
 CARGO_INSTALL_ARGS+=	--no-default-features
 CARGO_TEST_ARGS+=	--no-default-features
 .endif
 .if !empty(CARGO_FEATURES:N--no-default-features)
 CARGO_BUILD_ARGS+=	--features='${CARGO_FEATURES:N--no-default-features}'
 CARGO_INSTALL_ARGS+=	--features='${CARGO_FEATURES:N--no-default-features}'
 CARGO_TEST_ARGS+=	--features='${CARGO_FEATURES:N--no-default-features}'
 .endif
 
 .if !defined(WITH_DEBUG)
 CARGO_BUILD_ARGS+=	--release
 CARGO_TEST_ARGS+=	--release
 .else
 CARGO_INSTALL_ARGS+=	--debug
 .endif
 
 .if ${_CARGO_CRATES:Mcmake}
 BUILD_DEPENDS+=	cmake:devel/cmake
 .endif
 
 .if ${_CARGO_CRATES:Mgettext-sys}
 CARGO_ENV+=	GETTEXT_BIN_DIR=${LOCALBASE}/bin \
 		GETTEXT_INCLUDE_DIR=${LOCALBASE}/include \
 		GETTEXT_LIB_DIR=${LOCALBASE}/lib
 .endif
 
 .if ${_CARGO_CRATES:Mjemalloc-sys}
 BUILD_DEPENDS+=	gmake:devel/gmake
 .endif
 
 .if ${_CARGO_CRATES:Mlibgit2-sys}
 # Use the system's libgit2 instead of building the bundled version
 CARGO_ENV+=	LIBGIT2_SYS_USE_PKG_CONFIG=1
 .endif
 
 .if ${_CARGO_CRATES:Mlibssh2-sys}
 # Use the system's libssh2 instead of building the bundled version
 CARGO_ENV+=	LIBSSH2_SYS_USE_PKG_CONFIG=1
 .endif
 
 .if ${_CARGO_CRATES:Monig_sys}
 # onig_sys always prefers the system library but will try to link
 # statically with it.  Since devel/oniguruma doesn't provide a static
 # library it'll link to libonig.so instead.  Strictly speaking setting
 # RUSTONIG_SYSTEM_LIBONIG is not necessary, but will force onig_sys to
 # always use the system's libonig as returned by `pkg-config oniguruma`.
 CARGO_ENV+=	RUSTONIG_SYSTEM_LIBONIG=1
 .endif
 
 .if ${_CARGO_CRATES:Mopenssl-src}
 DEV_WARNING+=	"Please make sure this port uses the system OpenSSL and consider removing CARGO_CRATES=${CARGO_CRATES:Mopenssl-src-[0-9]*} (a vendored copy of OpenSSL) from the build, e.g., by patching Cargo.toml appropriately."
 .endif
 
 .if ${_CARGO_CRATES:Mopenssl-sys}
 # Make sure that openssl-sys can find the correct version of OpenSSL
 CARGO_ENV+=	OPENSSL_LIB_DIR=${OPENSSLLIB} \
 		OPENSSL_INCLUDE_DIR=${OPENSSLINC}
 .endif
 
 .if ${_CARGO_CRATES:Mpkg-config}
 .include "${USESDIR}/pkgconfig.mk"
 .endif
 
 .for _index _crate _name _version in ${_CARGO_CRATES}
 # Split up semantic version and try to sanitize it by removing
 # pre-release identifier (-) or build metadata (+)
 .  if ${_version:S/./ /:S/./ /:C/[-+].*//:_:[#]} == 3
 .    for _major _minor _patch in $_
 # FreeBSD 12.0 changed ABI: r318736 and r320043
 # https://github.com/rust-lang/libc/commit/78f93220d70e
 # https://github.com/rust-lang/libc/commit/969ad2b73cdc
 .      if ${_name} == libc && ${_major} == 0 && (${_minor} < 2 || (${_minor} == 2 && ${_patch} < 38))
 DEV_ERROR+=	"CARGO_CRATES=${_crate} may be unstable on FreeBSD 12.0. Consider updating to the latest version \(higher than 0.2.37\)."
 .      endif
 .      if ${_name} == libc && ${_major} == 0 && (${_minor} < 2 || (${_minor} == 2 && ${_patch} < 49))
 DEV_ERROR+=	"CARGO_CRATES=${_crate} may be unstable on aarch64 or not build on armv6, armv7, powerpc64. Consider updating to the latest version \(higher than 0.2.49\)."
 .      endif
 # FreeBSD 12.0 updated base OpenSSL in r339270:
 # https://github.com/sfackler/rust-openssl/commit/276577553501
 .      if ${_name} == openssl && !exists(${PATCHDIR}/patch-openssl-1.1.1) && ${_major} == 0 && (${_minor} < 10 || (${_minor} == 10 && ${_patch} < 4))
 DEV_WARNING+=	"CARGO_CRATES=${_crate} does not support OpenSSL 1.1.1. Consider updating to the latest version \(higher than 0.10.3\)."
 .      endif
 .    endfor
 .  endif
 .endfor
 
 _USES_extract+=	600:cargo-extract
 cargo-extract:
 # target for preparing crates directory.  It will put all crates in
 # the local crates directory.
 	@${ECHO_MSG} "===>  Moving crates to ${CARGO_VENDOR_DIR}"
 	@${MKDIR} ${CARGO_VENDOR_DIR}
 .for _crate in ${CARGO_CRATES}
 	@${MV} ${WRKDIR}/${_crate} ${CARGO_VENDOR_DIR}/${_crate}
 	@${PRINTF} '{"package":"%s","files":{}}' \
 		$$(${SHA256} -q ${DISTDIR}/${CARGO_DIST_SUBDIR}/${_crate}${CARGO_CRATE_EXT}) \
 		> ${CARGO_VENDOR_DIR}/${_crate}/.cargo-checksum.json
 	@if [ -r ${CARGO_VENDOR_DIR}/${_crate}/Cargo.toml.orig ]; then \
 		${MV} ${CARGO_VENDOR_DIR}/${_crate}/Cargo.toml.orig \
 			${CARGO_VENDOR_DIR}/${_crate}/Cargo.toml.orig-cargo; \
 	fi
 .endfor
 
 _CARGO_GIT_PATCH_CARGOTOML=
 .if ${CARGO_USE_GITHUB:tl} == "yes"
 .  for _group in ${GH_TUPLE:C@^[^:]*:[^:]*:[^:]*:(([^:/]*)?)((/.*)?)@\2@}
 .    if empty(CARGO_GIT_SUBDIR:M${_group}\:*)
 _CARGO_GIT_PATCH_CARGOTOML:= ${_CARGO_GIT_PATCH_CARGOTOML} \
 	-e "s@git *= *['\"](https|http|git)://github.com/${GH_ACCOUNT_${_group}}/${GH_PROJECT_${_group}}(\.git)?/?[\"']@path = \"${WRKSRC_${_group}}\"@"
 .    else
 .      for _group2 _crate _subdir in ${CARGO_GIT_SUBDIR:M${_group}\:*:S,:, ,g}
 _CARGO_GIT_PATCH_CARGOTOML:= ${_CARGO_GIT_PATCH_CARGOTOML} \
 	-e "/^${_crate} =/ s@git *= *['\"](https|http|git)://github.com/${GH_ACCOUNT_${_group}}/${GH_PROJECT_${_group}}(\.git)?/?[\"']@path = \"${WRKSRC_${_group}}/${_subdir}\"@"
 .	endfor
 .    endif
 .  endfor
 .endif
 .if ${CARGO_USE_GITLAB:tl} == "yes"
 .  for _group in ${GL_TUPLE:C@^(([^:]*://[^:/]*(:[0-9]{1,5})?(/[^:]*[^/])?:)?)([^:]*):([^:]*):([^:]*)(:[^:/]*)((/.*)?)@\8@:S/^://}
 .    if empty(CARGO_GIT_SUBDIR:M${_group}\:*)
 _CARGO_GIT_PATCH_CARGOTOML:= ${_CARGO_GIT_PATCH_CARGOTOML} \
 	-e "s@git *= *['\"]${GL_SITE_${_group}}/${GL_ACCOUNT_${_group}}/${GL_PROJECT_${_group}}(\.git)?/?['\"]@path = \"${WRKSRC_${_group}}\"@"
 .    else
 .      for _group2 _crate _subdir in ${CARGO_GIT_SUBDIR:M${_group}\:*:S,:, ,g}
 _CARGO_GIT_PATCH_CARGOTOML:= ${_CARGO_GIT_PATCH_CARGOTOML} \
 	-e "/^${_crate} = / s@git *= *['\"]${GL_SITE_${_group}}/${GL_ACCOUNT_${_group}}/${GL_PROJECT_${_group}}(\.git)?/?['\"]@path = \"${WRKSRC_${_group}}/${_subdir}\"@"
 .      endfor
 .    endif
 .  endfor
 .endif
 
 .if !empty(_CARGO_GIT_PATCH_CARGOTOML)
 _USES_patch+=	600:cargo-patch-git
 
 cargo-patch-git:
 	@${FIND} ${WRKDIR} -name Cargo.toml -type f -exec \
 		${SED} -i.dist -E ${_CARGO_GIT_PATCH_CARGOTOML} {} +
 .endif
 
 .if ${CARGO_CONFIGURE:tl} == "yes"
 _USES_configure+=	250:cargo-configure
 
 # configure hook.  Place a config file for overriding crates-io index
 # by local source directory.
 cargo-configure:
 # Check that the running kernel has COMPAT_FREEBSD11 required by lang/rust post-ino64
 	@${SETENV} CC="${CC}" OPSYS="${OPSYS}" OSVERSION="${OSVERSION}" WRKDIR="${WRKDIR}" \
 		${SH} ${SCRIPTSDIR}/rust-compat11-canary.sh
 	@${MKDIR} ${WRKDIR}/.cargo
 	@${ECHO_CMD} "[source.cargo]" > ${WRKDIR}/.cargo/config
 	@${ECHO_CMD} "directory = '${CARGO_VENDOR_DIR}'" >> ${WRKDIR}/.cargo/config
 	@${ECHO_CMD} "[source.crates-io]" >> ${WRKDIR}/.cargo/config
 	@${ECHO_CMD} "replace-with = 'cargo'" >> ${WRKDIR}/.cargo/config
 	@if ! ${GREP} -qF '[profile.release]' ${CARGO_CARGOTOML}; then \
 		${ECHO_CMD} "" >> ${CARGO_CARGOTOML}; \
 		${ECHO_CMD} "[profile.release]" >> ${CARGO_CARGOTOML}; \
 		${ECHO_CMD} "opt-level = 2" >> ${CARGO_CARGOTOML}; \
 		${ECHO_CMD} "debug = false" >> ${CARGO_CARGOTOML}; \
 	fi
 	@${CARGO_CARGO_RUN} update \
 		--manifest-path ${CARGO_CARGOTOML} \
 		--verbose \
 		--verbose \
 		${CARGO_UPDATE_ARGS}
 .endif
 
 .if !target(do-build) && ${CARGO_BUILD:tl} == "yes"
 do-build:
 	@${CARGO_CARGO_RUN} build \
 		--manifest-path ${CARGO_CARGOTOML} \
 		--verbose \
 		--verbose \
 		${CARGO_BUILD_ARGS}
 .endif
 
 .if !target(do-install) && ${CARGO_INSTALL:tl} == "yes"
 do-install:
 .  for path in ${CARGO_INSTALL_PATH}
 	@${CARGO_CARGO_RUN} install \
 		--no-track \
 		--path "${path}" \
 		--root "${STAGEDIR}${PREFIX}" \
 		--verbose \
 		--verbose \
 		${CARGO_INSTALL_ARGS}
 .  endfor
 .endif
 
 .if !target(do-test) && ${CARGO_TEST:tl} == "yes"
 do-test:
 	@${CARGO_CARGO_RUN} test \
 		--manifest-path ${CARGO_CARGOTOML} \
 		--verbose \
 		--verbose \
 		${CARGO_TEST_ARGS}
 .endif
 
 #
 # Helper targets for port maintainers
 #
 
 # cargo-crates will output the crates list from Cargo.lock.  If there
 # is no Cargo.lock for some reason, try and generate it first.
 cargo-crates: extract
 	@if [ ! -r "${CARGO_CARGOLOCK}" ]; then \
 		${ECHO_MSG} "===> ${CARGO_CARGOLOCK} not found.  Trying to generate it..."; \
 		${CARGO_CARGO_RUN} generate-lockfile \
 			--manifest-path ${CARGO_CARGOTOML} \
 			--verbose; \
 	fi
 	@${SETENV} USE_GITHUB=${USE_GITHUB} USE_GITLAB=${USE_GITLAB} GL_SITE=${GL_SITE} \
 		${AWK} -f ${SCRIPTSDIR}/split-url.awk -f ${SCRIPTSDIR}/cargo-crates.awk ${CARGO_CARGOLOCK}
 
 # cargo-crates-licenses will try to grab license information from
 # all downloaded crates.
 cargo-crates-licenses: configure
 	@${FIND} ${CARGO_VENDOR_DIR} -name 'Cargo.toml' -maxdepth 2 \
 		-exec ${GREP} -H '^license' {} \; \
 		| ${SED} \
 		-e 's@^${CARGO_VENDOR_DIR}/@@' \
 		-e 's@/Cargo.toml:license.*= *"@|@' \
 		-e 's@"$$@@g' | sort | /usr/bin/column -t -s '|'
 .endif