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authorMarc Chevrier <marc.chevrier@gmail.com>2020-05-28 12:52:57 (GMT)
committerBrad King <brad.king@kitware.com>2020-05-28 16:56:59 (GMT)
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ALIAS target: cannot overwrite an existing target
Fixes: #19616
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+CMP0107
+-------
+
+It is not allowed to create an ``ALIAS`` target with the same name as an
+another target.
+
+In CMake 3.17 and below, an ``ALIAS`` target can overwrite silently an existing
+target with the same name.
+
+The ``OLD`` behavior for this policy is to allow target overwrite.
+
+The ``NEW`` behavior of this policy is to prevent target overwriting.
+
+This policy was introduced in CMake version 3.17. Use the
+:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.
+Unlike many policies, CMake version |release| does *not* warn
+when this policy is not set and simply uses ``OLD`` behavior.
+
+.. include:: DEPRECATED.txt