Hi list, I have an issue caused by a warning in the qt5 brew version in osx when using Xcode generator
I can safely find the qt framework in the brew cellar: set(CMAKE_PREFIX_PATH /usr/local/opt/qt5) find_package(Qt5Widgets REQUIRED) and with this I can easily add this framework to my project by using target_link_libraries(myApp Qt5::Widgets) and this, as per documentation will cause to add all the -I<headers framework directories> when compiling the .o files for this target. The problem is that QT has some warning in their headers at the version 5.6 and 5.5.2_1 (that is all the qt5 the versions available in brew) and the -I<headers framework directory> it is not a system include parameter. So assuming that I cannot avoid to use the brew version and I cannot fix the problems in the qt5 headers, *How can I tell to cmake that these framework include directories are system include directories and thus they need to be included with -isystem in the xcode project?* I tryed to manually pass the flag to the compiler but the target_link_libraries function, when used with the framework, it will always put their include directories in front of mine without the isystem flag.
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