pkg-config on macOS doesn't detect exact protobuf-lite version

checking protobuf-lite matches /Users/videolanci/sandbox/bin/protoc version 3.21.1... Unknown version comparison operator '==' after package name 'protobuf-lite' in file '(command line arguments)' no

compared to builds on Linux

checking protobuf-lite matches /opt/tools/bin/protoc version 3.21.1... yes

It doesn't like this line.

PROTOBUF_TEST="protobuf-lite == ${PROTOBUF_VERSION}"