Workaround is to add this block to ios_app/build-rust-xcode.sh
# From https://github.com/TimNN/cargo-lipo/issues/41#issuecomment-774793892
if [[ -n "${DEVELOPER_SDK_DIR:-}" ]]; then
# Assume we're in Xcode, which means we're probably cross-compiling.
# In this case, we need to add an extra library search path for build scripts and proc-macros,
# which run on the host instead of the target.
# (macOS Big Sur does not have linkable libraries in /usr/lib/.)
export LIBRARY_PATH="${DEVELOPER_SDK_DIR}/MacOSX.sdk/usr/lib:${LIBRARY_PATH:-}"
fi
Workaround is to add this block to
ios_app/build-rust-xcode.sh