Unable to build on Cywgin

[kiranand]

This looks like an old issue but I am still running into it. I have tried all the existing fixes Google throws up but no joy. Please help.

configure: error: Package requirements (protobuf >= 2.6.0) were not met:

Package 'protobuf', required by 'virtual:world', not found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables protobuf_CFLAGS
and protobuf_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.