isEmpty(PREFIX) { PREFIX = /usr/local } BINDIR = $$PREFIX/bin DATADIR = $$PREFIX/share DEFINES += DATADIR=\"$$DATADIR\" PKGDATADIR=\"$$PKGDATADIR\" # Building for local use -> LEVDIR and IMGDIR are empty isEmpty(LEVDIR) { LEVDIR = data } isEmpty(IMGDIR) { IMGDIR = img } # Building for the debian package -> LEVDIR is /usr/share/${APPNAME} etc. DEFINES += LEVDIR=\\\"$$LEVDIR\\\" IMGDIR=\\\"$$IMGDIR\\\"