[gcc(refs/users/marxin/heads/PR93886-help-language-and-common)] Clear --help=language and --help=common interaction.

[Martin Liska]

https://gcc.gnu.org/g:31379d4a0d47c86e1c93d3e6e5018a4b07f26cce

commit 31379d4a0d47c86e1c93d3e6e5018a4b07f26cce
Author: Martin Liska <mliska@suse.cz>
Date:   Mon Mar 2 14:25:05 2020 +0100

    Clear --help=language and --help=common interaction.
    
    gcc/ChangeLog:
    
    2020-03-02  Martin Liska  <mliska@suse.cz>
    
    	PR c/93886
    	PR c/93887
    	* doc/invoke.texi: Clarify --help=language and --help=common
    	interaction.

Diff:
---
 gcc/doc/invoke.texi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 4f88fe6..e43d954 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1665,7 +1665,8 @@ option.
 @item @var{language}
 Display the options supported for @var{language}, where
 @var{language} is the name of one of the languages supported in this
-version of GCC@.
+version of GCC@.  If an option is supported by all languages, one needs
+to use @var{common} qualifier instead.
 
 @item @samp{common}
 Display the options that are common to all languages.