Change: [CMake] Improve 'In-source build' error message #8955
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Motivation / Problem
Once you tried to run cmake from source dir, you will constantly get the
In-source builds not allowed. Please run \"cmake ..\" from the bin directory
message, even if you follow what it says.That's because cmake created a CMakeCache.txt in source dir with "wrong" binary dir, and cmake will always use it.
Description
Add a hint to the error message to delete "broken" CMakeCache.txt
Limitations
Checklist for review
Some things are not automated, and forgotten often. This list is a reminder for the reviewers.