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c++qtqmake

Build multiple versions of a binary with qmake

I want to build two versions of my program, a "normal" version, and one in which the address sanitizer has been activated. As of now, I have this in my QSoas.pro

sanitizer {
  message("Activating the address sanitizer code")
  OBJECTS_DIR = build-snt
  QMAKE_CXXFLAGS += -fno-omit-frame-pointer -fsanitize=address
  LIBS += -fsanitize=address
  TARGET = $$join(TARGET,,,-snt)
}

This way, I can do:

~ qmake
~ make

to get the normal version, and

~ qmake CONFIG+=sanitizer
~ make

to get the version with the address sanitizer.

This is fine, but a little cumbersome, especially since I need in fact many other configuration options on the qmake command-line. Is there a way to have two targets, so that I could simply run

~ qmake
~ make
~ make my-sanitized-exe
Solution

  • The most natural way, IMO, is an out-of-source build. That is, create a subdirectory called "sanitizer", go into it, and build your Makefile(s) the same way you do it with cmake, meson etc.:

    mkdir sanitizer
cd sanitizer
qmake CONFIG+=sanitizer ../Qsoas.pro

    QMake natively supports out-of-source builds, so everything should be fine. However, if you need to distiguish between the source and build directories, you can use the variables $$PWD and $$OUT_PWD.

    See also qmake's manual for shadowed() function to translate the paths automatically.