diff options
Diffstat (limited to 'gcc/cp/decl2.c')
| -rw-r--r-- | gcc/cp/decl2.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/gcc/cp/decl2.c b/gcc/cp/decl2.c index 07bdd92de93..b2123f2decb 100644 --- a/gcc/cp/decl2.c +++ b/gcc/cp/decl2.c @@ -1996,19 +1996,30 @@ decl_needed_p (tree decl) COMDAT until that point. */ gcc_assert (at_eof); - /* All entities with external linkage that are not COMDAT should be + /* All entities with external linkage that are not COMDAT/EXTERN should be emitted; they may be referred to from other object files. */ - if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl)) + if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl) && !DECL_REALLY_EXTERN (decl)) return true; - /* If this entity was used, let the back end see it; it will decide - whether or not to emit it into the object file. */ - if (TREE_USED (decl)) - return true; /* Functions marked "dllexport" must be emitted so that they are visible to other DLLs. */ if (flag_keep_inline_dllexport && lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl))) return true; + + /* When not optimizing, do not bother to produce definitions for extern + symbols. */ + if (DECL_REALLY_EXTERN (decl) + && ((TREE_CODE (decl) != FUNCTION_DECL + && !optimize) + || (TREE_CODE (decl) == FUNCTION_DECL + && !opt_for_fn (decl, optimize))) + && !lookup_attribute ("always_inline", decl)) + return false; + + /* If this entity was used, let the back end see it; it will decide + whether or not to emit it into the object file. */ + if (TREE_USED (decl)) + return true; /* Virtual functions might be needed for devirtualization. */ if (flag_devirtualize && TREE_CODE (decl) == FUNCTION_DECL |