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-rw-r--r--Help/variable/CMAKE_LANG_FLAGS_INIT.rst6
1 files changed, 5 insertions, 1 deletions
diff --git a/Help/variable/CMAKE_LANG_FLAGS_INIT.rst b/Help/variable/CMAKE_LANG_FLAGS_INIT.rst
index a88d122..4a034e8 100644
--- a/Help/variable/CMAKE_LANG_FLAGS_INIT.rst
+++ b/Help/variable/CMAKE_LANG_FLAGS_INIT.rst
@@ -5,7 +5,11 @@ Value used to initialize the :variable:`CMAKE_<LANG>_FLAGS` cache entry
the first time a build tree is configured for language ``<LANG>``.
This variable is meant to be set by a :variable:`toolchain file
<CMAKE_TOOLCHAIN_FILE>`. CMake may prepend or append content to
-the value based on the environment and target platform.
+the value based on the environment and target platform. For example,
+the contents of a ``xxxFLAGS`` environment variable will be prepended,
+where ``xxx`` will be language-specific but not necessarily the same as
+``<LANG>`` (e.g. :envvar:`CXXFLAGS` for ``CXX``, :envvar:`FFLAGS` for
+``Fortran``, and so on).
See also the configuration-specific
:variable:`CMAKE_<LANG>_FLAGS_<CONFIG>_INIT` variable.