Debug bzip2 on static musl

Author: zanieb

cpython-unix/build-bzip2.sh

@@ -15,6 +15,20 @@ else
     AR=ar
 fi
 
+# Copy compiler-rt builtins library for static aarch64-musl builds
+if [ "${TARGET_TRIPLE}" = "aarch64-unknown-linux-musl" ] && [ "${CC}" = "musl-clang" ] && [ -n "${STATIC}" ]; then
+    # musl-clang eliminates default library search paths, so copy compiler-rt builtins to accessible location
+    for lib in ${TOOLS_PATH}/${TOOLCHAIN}/lib/clang/*/lib/linux/libclang_rt.builtins-aarch64.a; do
+        if [ -e "$lib" ]; then
+            filename=$(basename "$lib")
+            if [ -e "${TOOLS_PATH}/host/lib/${filename}" ]; then
+                echo "warning: ${filename} already exists"
+            fi
+            cp "$lib" ${TOOLS_PATH}/host/lib/
+        fi
+    done
+fi
+
 tar -xf bzip2-${BZIP2_VERSION}.tar.gz
 
 pushd bzip2-${BZIP2_VERSION}