To enable windows xp support, we must do two things:
1. linker flag must be /SUBSYSTEM:CONSOLE,5.01 or
/SUBSYSTEM:WINDOWS,5.01. For x64, the version is 5.02.
2. Do not use Windows Kit 8. Win SDK v7.1A is recommended. Prepend the
right include paths and lib paths to INCLUDE and LIB before
building.
The Windows XP target support is enabled by passing "-target xp" to
configure.
Task-number: QTBUG-29939
Change-Id: I84c8439606cc2a9d27d64947702846faa4f1e4a2
Reviewed-by: Lucas Wang <wbsecg1@gmail.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
