How is a Defines unset?

[Rdeserk]

In the Makefile, there are various defines.

DEFINES = -DFOO_SETTING_ONE -DFOO_SETTING_TWO

DEFINES = -DFOO_SETTING_ONE -DFOO_SETTING_TWO

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Does the following way of adding a "NO" work in all qmake Makefiles, or is there
another common way to unset a define?

DEFINES = -DNO_FOO_SETTING_ONE

DEFINES = -DNO_FOO_SETTING_ONE

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[wysota]

What do you mean by "adding a NO"? What you wrote adds a define called "NO_FOO_SETTING_ONE". If you want to remove a define then remove it from the variable:

DEFINES -= FOO_SETTING_ONE