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-rw-r--r--scripts/setup_rust_fork.sh4
-rwxr-xr-xscripts/test_bootstrap.sh4
2 files changed, 6 insertions, 2 deletions
diff --git a/scripts/setup_rust_fork.sh b/scripts/setup_rust_fork.sh
index 3e48fb006de..bbb8a010d96 100644
--- a/scripts/setup_rust_fork.sh
+++ b/scripts/setup_rust_fork.sh
@@ -4,7 +4,9 @@ set -e
 # Compiletest expects all standard library paths to start with /rustc/FAKE_PREFIX.
 # CG_CLIF_STDLIB_REMAP_PATH_PREFIX will cause cg_clif's build system to pass
 # --remap-path-prefix to handle this.
-CG_CLIF_STDLIB_REMAP_PATH_PREFIX=/rustc/FAKE_PREFIX ./y.sh build
+# CG_CLIF_FORCE_GNU_AS will force usage of as instead of the LLVM backend of rustc as we
+# the LLVM backend isn't compiled in here.
+CG_CLIF_FORCE_GNU_AS=1 CG_CLIF_STDLIB_REMAP_PATH_PREFIX=/rustc/FAKE_PREFIX ./y.sh build
 
 echo "[SETUP] Rust fork"
 git clone https://github.com/rust-lang/rust.git || true
diff --git a/scripts/test_bootstrap.sh b/scripts/test_bootstrap.sh
index 791d457993d..a8f6d7a2024 100755
--- a/scripts/test_bootstrap.sh
+++ b/scripts/test_bootstrap.sh
@@ -11,5 +11,7 @@ rm -r compiler/rustc_codegen_cranelift/{Cargo.*,src}
 cp ../Cargo.* compiler/rustc_codegen_cranelift/
 cp -r ../src compiler/rustc_codegen_cranelift/src
 
-./x.py build --stage 1 library/std
+# CG_CLIF_FORCE_GNU_AS will force usage of as instead of the LLVM backend of rustc as we
+# the LLVM backend isn't compiled in here.
+CG_CLIF_FORCE_GNU_AS=1 ./x.py build --stage 1 library/std
 popd