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-rw-r--r--Help/command/try_compile.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/Help/command/try_compile.rst b/Help/command/try_compile.rst
index 7e13ab166e..ca8fc77fab 100644
--- a/Help/command/try_compile.rst
+++ b/Help/command/try_compile.rst
@@ -156,7 +156,9 @@ the type of target used for the source file signature.
Set the :variable:`CMAKE_TRY_COMPILE_PLATFORM_VARIABLES` variable to specify
variables that must be propagated into the test project. This variable is
-meant for use only in toolchain files.
+meant for use only in toolchain files and is only honored by the
+``try_compile()`` command for the source files form, not when given a whole
+project.
If :policy:`CMP0067` is set to ``NEW``, or any of the ``<LANG>_STANDARD``,
``<LANG>_STANDARD_REQUIRED``, or ``<LANG>_EXTENSIONS`` options are used,