Where in Qt Creator do I pass arguments to a compi

Question

Where in Qt Creator do I pass arguments to a compiler?
It isn't really that obvious.

Answer 1

In your Qmake project file probably

Answer 2

Depending on your build system it's either in your qmake project file(.pro, standard for new projects) or in one of the CMake files (CMakeLists.txt, used by KDE and several other projects).

Using .pro:

QMAKE_CXXFLAGS += -O2

Using CMake:

set( CMAKE_CXX_FLAGS "-g -Wall")

Answer 3

If your intention is to precompile some source code you can do like this:

/A/ In your .pro file you can add a line like this:

DEFINES += HOPLA

/B/ In you .cpp or .h file you can use it like this

#ifdef HOPLA
// Do something
#else
// Do something different
#endif

Answer 4

for C projects, add the following line in .pro file

QMAKE_CFLAGS += -std=c99

Answer 5

To add compiler flags, open your .pro file and add a line like this:

QMAKE_CXXFLAGS += -std=c++0x

For standard flags like debug vs. release etc. you should try to use the predefined qmake options (see QMake documentation) for the sake of platform and compiler-independency, as QMake will map them to the compiler-specific flags.