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[Bug target/81879] Bad compilation of small program if LTO is used
- From: "freddy77 at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 21 Aug 2017 10:39:10 +0000
- Subject: [Bug target/81879] Bad compilation of small program if LTO is used
- Auto-submitted: auto-generated
- References: <bug-81879-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81879
--- Comment #3 from Frediano Ziglio <freddy77 at gmail dot com> ---
I noted that during the link the resolution file using -static or not is
different
without -static
750 6dacea834fb099d1 PREVAILING_DEF_IRONLY _ZNKSt5ctypeIcE8do_widenEc
753 6dacea834fb099d1 PREVAILING_DEF main
738 6dacea834fb099d1 RESOLVED_EXEC
_ZNKSt9basic_iosIcSt11char_traitsIcEE5widenEc
743 6dacea834fb099d1 RESOLVED_EXEC
_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
797 6dacea834fb099d1 UNDEF _ZSt4cout
761 6dacea834fb099d1 RESOLVED_EXEC _ZNSt8ios_base4InitD1Ev
766 6dacea834fb099d1 RESOLVED_EXEC _ZNKSt5ctypeIcE13_M_widen_initEv
771 6dacea834fb099d1 RESOLVED_EXEC _ZSt16__throw_bad_castv
776 6dacea834fb099d1 RESOLVED_EXEC _ZNSo5flushEv
782 6dacea834fb099d1 RESOLVED_EXEC _ZNSo3putEc
788 6dacea834fb099d1 RESOLVED_EXEC atexit
791 6dacea834fb099d1 RESOLVED_EXEC _ZNSt8ios_base4InitC1Ev
with -static
750 1b64a3a32ab1e36a PREEMPTED_REG _ZNKSt5ctypeIcE8do_widenEc
753 1b64a3a32ab1e36a PREVAILING_DEF main
738 1b64a3a32ab1e36a RESOLVED_EXEC
_ZNKSt9basic_iosIcSt11char_traitsIcEE5widenEc
743 1b64a3a32ab1e36a RESOLVED_EXEC
_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
797 1b64a3a32ab1e36a RESOLVED_EXEC _ZSt4cout
761 1b64a3a32ab1e36a RESOLVED_EXEC _ZNSt8ios_base4InitD1Ev
766 1b64a3a32ab1e36a RESOLVED_EXEC _ZNKSt5ctypeIcE13_M_widen_initEv
771 1b64a3a32ab1e36a RESOLVED_EXEC _ZSt16__throw_bad_castv
776 1b64a3a32ab1e36a RESOLVED_EXEC _ZNSo5flushEv
782 1b64a3a32ab1e36a RESOLVED_EXEC _ZNSo3putEc
788 1b64a3a32ab1e36a RESOLVED_EXEC atexit
791 1b64a3a32ab1e36a RESOLVED_EXEC _ZNSt8ios_base4InitC1Ev
Specifically the _ZNKSt5ctypeIcE8do_widenEc (our missing function) in the
failing case is PREEMPTED_REG while with the successful one is
PREVAILING_DEF_IRONLY.