Tools/qmake/mkspecs/features/use_all_in_one_files.prf

# -------------------------------------------------------------------
# This feature enables the use of AllInOne.cpp files by adding them
# to SOURCES and removing the sources the corresponding files include
# from SOURCES, to avoid duplicated compilation units.
#
# See 'Tools/qmake/README' for an overview of the build system
# -------------------------------------------------------------------

# Globbing all does not work yet, not all AllInOne files build reliably yet.
# So instead we select them manually.
#collection = $$files($$_PRO_FILE_PWD_/*AllInOne.cpp, true)
collection = $$ALL_IN_ONE_SOURCES

for(collectionFile, collection) {
    lines = $$cat($$_PRO_FILE_PWD_/$$collectionFile, lines)
    for(line, lines) {
        line = $$find(line, "^.+include \"(.*)\"")
        isEmpty(line): next()
        line ~= s/^.+include \"(.*)\"/\\1/
        source = $$dirname(collectionFile)/$$line
        contains(SOURCES, $$source) {
            SOURCES -= $$source
            tookFromSources = true
        }
    }
    !isEmpty(tookFromSources): SOURCES *= $$collectionFile
}