Fix QtCreator not finding CMake

buildrun.png

compiler.png

FixQtCreator.md

Problem Description

QtCreator complains on opening new CMakeLists.txt project that

No CMAKE_CXX_COMPILER could be found.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.

The full error log starts

Running "/usr/bin/cmake /home/adas/cs40/examples '-GCodeBlocks - Unix Makefiles' -DCMAKE_CXX_COMPILER:STRING= -DQT_QMAKE_EXECUTABLE:STRING=/usr/lib/x86_64-linux-gnu/qt5/bin/qmake" in /tmp/qtc-cmake-YX2DyA.
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is unknown
...

Indeed the CMAKE_CXX_COMPILER string is empty

Possible Fix

• Open qtcreator
• On the top menu, go to Tools->Options
• Select Build & Run icon on left side See the buildrun.png image above
• Select Kits on top tab
• Select Desktop (default)
• Select a legit compiler from the compiler menu, e.g., Clang x86 64bit
  • If no options show up in the drop down, you may need to select manage and manually add /usr/bing/clang++ See compiler.png above
• Select Apply

It works! So what caused this problem?

Glad you found this five year old note helpful. I don't know the cause of the problem. That's perhaps a Qt question.

Glad you found this five year old note helpful. I don't know the cause of the problem. That's perhaps a Qt question.

Ok, it's fine. This has helped me a lot. Thanks again! 😀