installing libxcb - No package 'xproto' found

I am trying to install libxcb: I started with xcb-proto 1.11 with:

./configure --prefix=/usr

Which works without errors.

But when i try to install libXau-1.0.8 with:

./configure --prefix=/usr

I get the error:

checking for XAU... configure: error: Package requirements (xproto) were not met:

No package 'xproto' found
Consider adjusting the PKG_CONFIG_PATH environment variable,...

I am not sure if i missed some important parameter for the installation or something ?

Solution

Thank your for your help!

I was missing these two libs: libpthread-stubs and xproto