Genex: Add generator expressions $<DEVICE_LINK> and $<HOST_LINK>

These generator expressions can only be used in link options properties.
These expressions return the arguments respectively for device and host link
step, otherwise return an empty string.

2 files changed, 18 insertions, 0 deletions

diff --git a/Help/manual/cmake-generator-expressions.7.rst b/Help/manual/cmake-generator-expressions.7.rst
index 72de4ac..9e411a4 100644
--- a/Help/manual/cmake-generator-expressions.7.rst
+++ b/Help/manual/cmake-generator-expressions.7.rst
@@ -362,6 +362,18 @@ Variable Queries
     evaluation will give ``C`` as link language, so the second pass will
     correctly add target ``libother`` as link dependency.
 
+``$<DEVICE_LINK:list>``
+  Returns the list if it is the device link step, an empty list otherwise.
+  The device link step is controlled by :prop_tgt:`CUDA_SEPARABLE_COMPILATION`
+  and :prop_tgt:`CUDA_RESOLVE_DEVICE_SYMBOLS` properties. This expression can
+  only be used to specify link options.
+
+``$<HOST_LINK:list>``
+  Returns the list if it is the normal link step, an empty list otherwise.
+  This expression is mainly useful when a device link step is also involved
+  (see ``$<DEVICE_LINK:list>`` generator expression). This expression can only
+  be used to specify link options.
+
 String-Valued Generator Expressions
 ===================================
 
diff --git a/Help/release/dev/genex-DEVICE_LINK-HOST_LINK.rst b/Help/release/dev/genex-DEVICE_LINK-HOST_LINK.rst
new file mode 100644
index 0000000..ef275e7
--- /dev/null
+++ b/Help/release/dev/genex-DEVICE_LINK-HOST_LINK.rst
@@ -0,0 +1,6 @@
+genex-DEVICE_LINK-HOST_LINK
+---------------------------
+
+* To manage device and host link steps, the ``$<DEVICE_LINK:...>`` and
+  ``$<HOST_LINK:...>``
+  :manual:`generator expressions <cmake-generator-expressions(7)>` were added.