implemented a new localPassc pragma (#12706)

doc/manual.rst

@@ -6560,18 +6560,31 @@ The ``link`` pragma can be used to link an additional file with the project:
 
 PassC pragma
 ------------
-The ``passC`` pragma can be used to pass additional parameters to the C
-compiler like you would using the commandline switch ``--passC``:
+The ``passc`` pragma can be used to pass additional parameters to the C
+compiler like you would using the commandline switch ``--passc``:
 
 .. code-block:: Nim
-  {.passC: "-Wall -Werror".}
+  {.passc: "-Wall -Werror".}
 
 Note that you can use ``gorge`` from the `system module <system.html>`_ to
 embed parameters from an external command that will be executed
 during semantic analysis:
 
 .. code-block:: Nim
-  {.passC: gorge("pkg-config --cflags sdl").}
+  {.passc: gorge("pkg-config --cflags sdl").}
+
+
+LocalPassc pragma
+-----------------
+The ``localPassc`` pragma can be used to pass additional parameters to the C
+compiler, but only for the C/C++ file that is produced from the Nim module
+the pragma resides in:
+
+.. code-block:: Nim
+  # Module A.nim
+  # Produces: A.nim.cpp
+  {.localPassc: "-Wall -Werror".} # Passed when compiling A.nim.cpp
+
 
 PassL pragma
 ------------