How to separate "wince" and "windows" in .pro files?

[lampard2013]

I use printsupport module in my project.but my wince library does not support it, So When I compile windows7 version,I need to include it ,in WinCE version I want to exclude it.
I do not know how to do it in .pro file. I search the document, it seems that ,only win32/unix/mac can be used.

[at1970]

for qt 5.3
...
TARGET = foo

wince*: {
SIGNATURE_FILE = somepath\customSignature.pfx
}
...