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-rwxr-xr-xsrc/ci/run.sh5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/ci/run.sh b/src/ci/run.sh
index 9a247fb60..9d98ce224 100755
--- a/src/ci/run.sh
+++ b/src/ci/run.sh
@@ -69,6 +69,11 @@ RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.codegen-units-std=1"
# space required for CI artifacts.
RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --dist-compression-formats=xz"
+# Enable the `c` feature for compiler_builtins, but only when the `compiler-rt` source is available.
+if [ "$EXTERNAL_LLVM" = "" ]; then
+ RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set build.optimized-compiler-builtins"
+fi
+
if [ "$DIST_SRC" = "" ]; then
RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --disable-dist-src"
fi