A minimal project to show an intelligence include error.
Open the project with clang 12.0 configuration on MacOS.
There will be a squiggle under #import <Accelerate/Accelerate.h>
The error message should say: cannot open source file "cblas.h" (dependency of "Accelerate.framework/Headers/Accelerate.h")C/C++(1696)
Squiggle underneath #include <stdlib.h>
. You can get rid of this squiggle by deactivating precompiled headers in the CMakeLists.txt (which of course is not desireable in a real project)