Clear --help=language and --help=common interaction.

	PR c/93886
	PR c/93887
	* doc/invoke.texi: Clarify --help=language and --help=common
	interaction.

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index caa854d..a08bdaf 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2020-03-04  Martin Liska  <mliska@suse.cz>
+
+       PR c/93886
+       PR c/93887
+       * doc/invoke.texi: Clarify --help=language and --help=common
+       interaction.
+
 2020-03-04  Jakub Jelinek  <jakub@redhat.com>
 
        PR tree-optimization/94001

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 54375eb..f51729d 100644 (file)
--- 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 select @samp{common} class.
 
 @item @samp{common}
 Display the options that are common to all languages.