[Bug lto/53808] Undefined symbol when building a library with lto

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53808

--- Comment #13 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Jul 30 17:27:14 2014
New Revision: 213307

URL: https://gcc.gnu.org/viewcvs?rev=213307&root=gcc&view=rev
Log:
    PR lto/53808
    PR c++/61659
    * pt.c (push_template_decl_real): Set DECL_COMDAT on templates.
    (check_explicit_specialization): Clear it on specializations.
    * decl.c (duplicate_decls, start_decl): Likewise.
    (grokmethod, grokfndecl): Set DECL_COMDAT on inlines.
    * method.c (implicitly_declare_fn): Set DECL_COMDAT.  Determine
    linkage after setting the appropriate flags.
    * tree.c (decl_linkage): Don't check DECL_COMDAT.
    * decl2.c (mark_needed): Mark clones.
    (import_export_decl): Not here.

Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/decl2.c
    trunk/gcc/cp/method.c
    trunk/gcc/cp/pt.c
    trunk/gcc/cp/tree.c
    trunk/gcc/testsuite/g++.dg/opt/devirt4.C