'QtCreator: Header files not found when using CMake

I have tried this on multiple platforms, experiencing the same issue every time.

I successfully build and run my C++ OpenFrameworks application using QtCreator - no problems are encountered.

Then, I successfully use qmake to generate the project file.

Yet when I attempt to make the executable, I receive the following error:

make
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -pipe -stdlib=libc++ -O2 -std=gnu++1z  -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk -mmacosx-version-min=12 -Wall -Wextra -fPIC -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -I/opt/homebrew/lib/QtGui.framework/Headers -I/opt/homebrew/lib/QtCore.framework/Headers -I. -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/System/Library/Frameworks/OpenGL.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/System/Library/Frameworks/AGL.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/System/Library/Frameworks/OpenGL.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/System/Library/Frameworks/AGL.framework/Headers -I/opt/homebrew/share/qt/mkspecs/macx-clang -F/opt/homebrew/lib -o main.o src/main.cpp
src/main.cpp:1:10: fatal error: 'ofMain.h' file not found
#include "ofMain.h"
         ^~~~~~~~~~
1 error generated.
make: *** [main.o] Error 1

I can go into the .pro file and add things to the include path manually, but I don't see why these includes aren't generated automatically?

qtcmakeqt-creatorqmake


Solution 1:[1]

I think I recognized your problem.
The file name is main.cpp in the src/ folder. Based on its location in the src/ folder, I think your ofMain.h file is also in the src/ folder. Now a question: did you add src/ to your include path? If not with the following line:

INCLUDEPATH += \
    src/

It should work now I hope.
Have a nice day!

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Tim Gromeyer

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