How do I set compiler flags per target in qmake for C++?

In qmake, you can set specific compiler flags for different targets by utilizing the `QMAKE_CXXFLAGS` variable within the respective target's scope. This allows for fine-tuning of compilation options based on the needs of each target in your project.

Here's how you can set different compiler flags for your application and library targets:

TEMPLATE = subdirs SUBDIRS += app lib app { # Application target TEMPLATE = app SOURCES += main.cpp QMAKE_CXXFLAGS += -Wall -O2 } lib { # Library target TEMPLATE = lib SOURCES += library.cpp QMAKE_CXXFLAGS += -fPIC -O3 }

In this example, the application target, `app`, has compiler flags set to `-Wall` for warnings and `-O2` for optimization level 2, while the library target, `lib`, has `-fPIC` for position-independent code and `-O3` for high-level optimizations.


C++ qmake compiler flags project configuration multiple targets

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