Tell QMake to add a literal string to the Makefile

[ykozlov]

I know this is an old thread but because it's one of the first things that came up on Google on this topic I wanted to provide an answer.

For SUBDIRS projects the given answer is partially correct. To prevent the subprojects building in parallel to each other at all, just use CONFIG+=ordered. To prevent only some subprojects from building in parallel, use "depends" like so:

bproj.depends = aproj

bproj.depends = aproj

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Still, sometimes you need to prevent a given subproject from building its files in parallel. For example, I have some template heavy code where compiling each file takes all the system memory. I want to make just that subproject build serially. This is where GNU Make's "NOTPARALLEL" is useful. This gets qmake to add it to the Makefile:

unix {
  notparalleltarget.target = .NOTPARALLEL
  QMAKE_EXTRA_TARGETS += notparalleltarget
}

unix {
  notparalleltarget.target = .NOTPARALLEL
  QMAKE_EXTRA_TARGETS += notparalleltarget
}

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