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-rw-r--r--Help/manual/cmake-variables.7.rst1
-rw-r--r--Help/variable/CMAKE_LANG_COMPILER_FRONTEND_VARIANT.rst18
2 files changed, 19 insertions, 0 deletions
diff --git a/Help/manual/cmake-variables.7.rst b/Help/manual/cmake-variables.7.rst
index 17f04ab..a2103f7 100644
--- a/Help/manual/cmake-variables.7.rst
+++ b/Help/manual/cmake-variables.7.rst
@@ -71,6 +71,7 @@ Variables that Provide Information
/variable/CMAKE_JOB_POOL_PRECOMPILE_HEADER
/variable/CMAKE_JOB_POOLS
/variable/CMAKE_LANG_COMPILER_AR
+ /variable/CMAKE_LANG_COMPILER_FRONTEND_VARIANT
/variable/CMAKE_LANG_COMPILER_RANLIB
/variable/CMAKE_LANG_LINK_LIBRARY_SUFFIX
/variable/CMAKE_LINK_LIBRARY_SUFFIX
diff --git a/Help/variable/CMAKE_LANG_COMPILER_FRONTEND_VARIANT.rst b/Help/variable/CMAKE_LANG_COMPILER_FRONTEND_VARIANT.rst
new file mode 100644
index 0000000..128b1fb
--- /dev/null
+++ b/Help/variable/CMAKE_LANG_COMPILER_FRONTEND_VARIANT.rst
@@ -0,0 +1,18 @@
+CMAKE_<LANG>_COMPILER_FRONTEND_VARIANT
+--------------------------------------
+
+.. versionadded:: 3.14
+
+Identification string of the compiler frontend variant.
+
+Some compilers have multiple, different frontends for accepting command
+line options. (For example ``Clang`` originally only had a frontend
+compatible with the ``GNU`` compiler but since its port to Windows
+(``Clang-Cl``) it now also supports a frontend compatible with ``MSVC``.)
+When CMake detects such a compiler it sets this
+variable to what would have been the :variable:`CMAKE_<LANG>_COMPILER_ID` for
+the compiler whose frontend it resembles.
+
+.. note::
+ In other words, this variable describes what command line options
+ and language extensions the compiler frontend expects.