Qt does not compile on HP-UX with aCC 3.60

The following error is encountered

aCC -c -AA +DAportable -w -D_STRICT_ANSI_ -D_HPUX_SOURCE -I/BAGJAS/BAGJAST/Agent/openssl/include -g -DQT_EDITION=QT_EDITION_DESKTOP -DQT_NO_CONCURRENT -DQT_BOOTSTRAPPED -DQT_UIC -DQT_LITE_UNICODE -DQT_NO_DATASTREAM -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_UNICODETABLES -DQT_NO_LIBRARY -DQT_NO_SYSTEMLOCALE -DQT_NO_GEOM_VARIANT -DQT_NO_USING_NAMESPACE -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_TO_ASCII -DQT_NO_QT3_SUPPORT -DQT_UIC_CPP_GENERATOR -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../../../mkspecs/hpux-acc -I. -I../../corelib/arch/generic -I../../../include -I. -I../../../include/QtCore -I../../../include/QtXml -I../../xml -I. -Icpp -I. -I../../3rdparty/zlib -I.uic/debug-static -o .obj/debug-static/cppwritedeclaration.o cpp/cppwritedeclaration.cpp
Warning: 1 future errors were detected and suppressed. Either remove the '-w' option or add a '+p' option to detect and fix them before they become fatal errors in a future release.

This can be fixed by changing "-w" to "+p" in the qmake.conf file.