qiBuild tips and tricks¶
Here is a few collections of tips and tricks when using the qibuild framework
The builtin documentation is directly generated from the source code, so it will always be accurate.
Trust it and use it!
You can use
To see a short description of all qibuild actions, and also
$ qibuild help <action>
To see the full help of the given action
First of, a reminder: you should never use subdirs, but use add_subdirectory instead
subdirs is deprecated, and, worse, the parsing order when using
is not defined!
Let’s assume you have a
foobar project, with two libraries,
bar depending on
You could end up write something like
# foobar/ CMakeLists.txt project(foobar) add_subdirectory(bar) add_subdirectory(foo)
# foobar/bar/CMakeLists.txt qi_create_lib(bar bar.cpp) qi_use_lib(bar foo)
# foobar/foo/CMakeLists.txt qi_create_lib(foo bar.cpp) qi_stage_lib(foo)
But then you will have this strange message:
$ qibuild configure foobar Could not find module FindFoo.cmake or a configuration file for package FOO. Adjust CMAKE_MODULE_PATH to find FindFOO.cmake or set FOO_DIR to the directory containing a CMake configuration file for FOO. The file will have one of the following names: FooConfig.cmake foo-config.cmake
This strange message will magically go away the next time you run
qibuild configure ...
Because CMake only parses the CMakeLists only once.
So by the time it gets through
it has not parsed
foo/CMakeLists.txt yet, so the
has not been staged yet.
But it does not stop the processing, and stages the
foo library anyway ...
So the basic rule should be:
Always clean up build/sdk when changing CMake dependencies
The fix is easy: make sure you stage the
foo library before using it:
# foobar/ CMakeLists.txt project(foobar) add_subdirectory(foo) add_subdirectory(bar)
qibuild will not change your compile flags at all.
If you work in a cross-platform environment, it is advised you
This will triggers compile warnings for all platforms (cl.exe and gcc.exe)
You can then use
$ qibuild configure --werror
To make sure compile warnings will be treated as errors for any following build of the same project.