[libmicrohttpd] Build problems under Ubuntu

[Peter Spiess-Knafl]

Hello!

I built a JSON-RPC framework which I currently try to move from mongoose
to libmicrohttpd.

Everything builds fine under Debian Jessie. But on the travis-ci agent,
which runs Ubuntu 12.04 Server I get the following compile error:

/usr/include/microhttpd.h:497:3: error: unknown type name 'intptr_t'

Build log can be found here:

https://travis-ci.org/cinemast/libjson-rpc-cpp/jobs/39444160#L143

The corresponding source code can be found here:
https://github.com/cinemast/libjson-rpc-cpp/blob/feature/libmicrohttpd/src/jsonrpccpp/server/connectors/httpserver.h
https://github.com/cinemast/libjson-rpc-cpp/blob/feature/libmicrohttpd/src/jsonrpccpp/server/connectors/httpserver.cpp

Has anyone any ideas on that?

Thanks in advance,
Peter