1 files changed, 30 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_gcc/build_sysroot/build_sysroot.sh b/compiler/rustc_codegen_gcc/build_sysroot/build_sysroot.sh
new file mode 100755
index 000000000..f293192a0
--- /dev/null
+++ b/compiler/rustc_codegen_gcc/build_sysroot/build_sysroot.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# Requires the CHANNEL env var to be set to `debug` or `release.`
+
+set -e
+cd $(dirname "$0")
+
+pushd ../ >/dev/null
+source ./config.sh
+popd >/dev/null
+
+# Cleanup for previous run
+#     v Clean target dir except for build scripts and incremental cache
+rm -r target/*/{debug,release}/{build,deps,examples,libsysroot*,native} 2>/dev/null || true
+rm Cargo.lock test_target/Cargo.lock 2>/dev/null || true
+rm -r sysroot/ 2>/dev/null || true
+
+# Build libs
+export RUSTFLAGS="$RUSTFLAGS -Z force-unstable-if-unmarked -Cpanic=abort"
+if [[ "$1" == "--release" ]]; then
+    sysroot_channel='release'
+    RUSTFLAGS="$RUSTFLAGS -Zmir-opt-level=3" cargo build --target $TARGET_TRIPLE --release
+else
+    sysroot_channel='debug'
+    cargo build --target $TARGET_TRIPLE --features compiler_builtins/c
+fi
+
+# Copy files to sysroot
+mkdir -p sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
+cp -r target/$TARGET_TRIPLE/$sysroot_channel/deps/* sysroot/lib/rustlib/$TARGET_TRIPLE/lib/