target_sources() command converts relative paths to absolute.
In CMake 3.13 and above, the
target_sources() command now converts relative source file paths to absolute paths in the following cases:
SOURCE_DIRproperty differs from
A path that begins with a generator expression is always left unmodified.
This policy provides compatibility with projects that have not been updated to expect this behavior. The
OLD behavior for this policy is to leave all relative source file paths unmodified. The
NEW behavior of this policy is to convert relative paths to absolute according to above rules.
This policy was introduced in CMake version 3.13. CMake version 3.15.2 warns when the policy is not set and uses
OLD behavior. Use the
cmake_policy() command to set it to
OLD behavior of a policy is
deprecated by definition and may be removed in a future version of CMake.
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