Building against ICU in debug and release

[supagu]

I am trying to build Qt with ICU (so I can use webkit), I have built both a debug and release version of ICU libraries
but the problem is, Qt uses the release ICU libraries even in the debug build

this is how I configure Qt:
configure {other options here} -icu -I {debug include path} -L {debug lib path} -I {release include path} -L {release lib path}

One thing I tried to do was to perform two separate builds of Qt, one that builds only release libraries (-release configure option)
and a build that only builds debug libraries (-debug configure option).
But got stuck here as the debug build would also perform a release build if I used the -debug configure option.

How can I get a debug build building against debug ICU and the release build building against release ICU?

[supagu]

I worked it out, if I add -debug or -release to my make command then I can just do two separate builds of qt. One for debug which uses debug ICU and another build for release which uses release ICU