Andriy Golovnya - 2013-02-03

BUILD_H = src/build.h
QMAKE_EXTRA_VARIABLES += BUILD_H
PRE_TARGETDEPS += build_h

build_h.target = build_h
build_h.commands = perl ./make_build_svn.pl $(EXPORT_BUILD_H)
QMAKE_EXTRA_TARGETS += build_h

It should be there! Can you post Qt version information (qmake -v or so)?
The build.h generator is also requires perl and svn. Can you check if your system has them?