* tree.h (DECL_EXTERNAL): Clarify documentation.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@108221 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6113f45..e67b713 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2005-12-08  Gabriel Dos Reis  <gdr@integrable-solutions.net>
+
+       * tree.h (DECL_EXTERNAL): Clarify documentation.
+
 2005-12-08  Andreas Krebbel  <krebbel1@de.ibm.com>
             Jakub Jelinek  <jakub@redhat.com>
 

diff --git a/gcc/tree.h b/gcc/tree.h
index 99c18f4..01e086d 100644 (file)
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -2144,7 +2144,12 @@ struct tree_memory_tag GTY(())
 #define DECL_LANG_SPECIFIC(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_specific)
 
 /* In a VAR_DECL or FUNCTION_DECL, nonzero means external reference:
-   do not allocate storage, and refer to a definition elsewhere.  */
+   do not allocate storage, and refer to a definition elsewhere.  Note that
+   this does not necessarily imply the entity represented by NODE
+   has no program source-level definition in this translation unit.  For
+   example, for a FUNCTION_DECL, DECL_SAVED_TREE may be non-NULL and
+   DECL_EXTERNAL may be true simultaneously; that can be the case for
+   a C99 "extern inline" function.  */
 #define DECL_EXTERNAL(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.decl_flag_2)
 
 /* In a VAR_DECL for a RECORD_TYPE, sets number for non-init_priority