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-rw-r--r--Help/variable/CMAKE_LANG_FLAGS.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/Help/variable/CMAKE_LANG_FLAGS.rst b/Help/variable/CMAKE_LANG_FLAGS.rst
index 14b2694..11864f8 100644
--- a/Help/variable/CMAKE_LANG_FLAGS.rst
+++ b/Help/variable/CMAKE_LANG_FLAGS.rst
@@ -15,3 +15,6 @@ This is initialized for each language from environment variables:
Initialized by the :envvar:`CUDAFLAGS` environment variable.
* ``CMAKE_Fortran_FLAGS``:
Initialized by the :envvar:`FFLAGS` environment variable.
+
+This value is a command-line string fragment. Therefore, multiple options
+should be separated by spaces, and options with spaces should be quoted.