Updated plugins

sources_non_forked/ale/doc/ale-c.txt

@@ -133,7 +133,42 @@ g:ale_c_cc_options                                         *g:ale_c_cc_options*
   Type: |String|
   Default: `'-std=c11 -Wall'`
 
-  This variable can be change to modify flags given to the C compiler.
+  This variable can be changed to modify flags given to the C compiler.
+
+
+g:ale_c_cc_use_header_lang_flag               *g:ale_c_cc_use_header_lang_flag*
+                                              *b:ale_c_cc_use_header_lang_flag*
+  Type: |Number|
+  Default: `-1`
+
+  By default, ALE will use `'-x c-header'` instead of `'-x c'` for header files
+  when using Clang.
+
+  This variable can be changed to manually activate or deactivate this flag
+  for header files.
+
+  - When set to `-1`, the default beviour is used, `'-x c-header'` is used with
+    Clang and `'-x c'` is used with other compilers.
+  - When set to `0`, the flag is deactivated, `'-x c'` is always used
+    independently of the compiler.
+  - When set to `1`, the flag is activated, `'-x c-header'` is always used
+    independently of the compiler.
+
+  Gcc does not support `'-x c-header'` when using `'-'` as input filename,
+  which is what ALE does. This why, by default, ALE only uses `'-x c-header'`
+  with Clang.
+
+
+g:ale_c_cc_header_exts                                 *g:ale_c_cc_header_exts*
+                                                       *b:ale_c_cc_header_exts*
+  Type: |List|
+  Default: `['h']`
+
+  This variable can be changed to modify the list of extensions of the files
+  considered as header files.
+
+  This variable is only used when `'-x c-header'` is used instead of `'-x c'`,
+  see |ale_c_cc_use_header_lang_flag|.
 
 
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