# Requires the CHANNEL env var to be set to `debug` or `release.`
set -e
-cd $(dirname "$0")
-pushd ../ >/dev/null
source ./config.sh
-popd >/dev/null
+
+dir=$(pwd)
+
+# Use rustc with cg_clif as hotpluggable backend instead of the custom cg_clif driver so that
+# build scripts are still compiled using cg_llvm.
+export RUSTC=$dir"/cg_clif_build_sysroot"
+export RUSTFLAGS=$RUSTFLAGS" --clif"
+
+cd $(dirname "$0")
# Cleanup for previous run
# v Clean target dir except for build scripts and incremental cache
-rm -r target/*/{debug,release}/{build,deps,examples,libsysroot*,native} || true
-rm Cargo.lock 2>/dev/null || true
-rm -r sysroot 2>/dev/null || true
+rm -r target/*/{debug,release}/{build,deps,examples,libsysroot*,native} 2>/dev/null || true
+
+# We expect the target dir in the default location. Guard against the user changing it.
+export CARGO_TARGET_DIR=target
# Build libs
-export RUSTFLAGS="$RUSTFLAGS -Z force-unstable-if-unmarked"
-if [[ "$1" == "--release" ]]; then
+export RUSTFLAGS="$RUSTFLAGS -Zforce-unstable-if-unmarked -Cpanic=abort"
+if [[ "$1" != "--debug" ]]; then
sysroot_channel='release'
- RUSTFLAGS="$RUSTFLAGS -Zmir-opt-level=3" cargo build --target $TARGET_TRIPLE --release
+ # FIXME Enable incremental again once rust-lang/rust#74946 is fixed
+ # FIXME Enable -Zmir-opt-level=2 again once it doesn't ice anymore
+ CARGO_INCREMENTAL=0 RUSTFLAGS="$RUSTFLAGS" cargo build --target $TARGET_TRIPLE --release
else
sysroot_channel='debug'
cargo build --target $TARGET_TRIPLE
fi
# Copy files to sysroot
-mkdir -p sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
-cp target/$TARGET_TRIPLE/$sysroot_channel/deps/*.rlib sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
+mkdir -p $dir/sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
+cp -a target/$TARGET_TRIPLE/$sysroot_channel/deps/* $dir/sysroot/lib/rustlib/$TARGET_TRIPLE/lib/