We discovered this issue while importing newer gcc 4.1* into NetBSD tree and
saw that suddently it no longer thinks COMDAT is supported.
I've tracked it down to the following change:
http://gcc.gnu.org/viewcvs?view=rev&revision=99395
that changed configure.ac to check $ld_date to decide if COMDAT is supported.
There are two problems with that change:
1) Released versions of binutils 2.16* do NOT have date in the ld version
string:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/ldver.c?rev=1.10&content-type=text/x-cvsweb-markup&cvsroot=src
fprintf (stdout, _("GNU ld version %s\n"), BFD_VERSION_STRING);
2) The above change to confgiure unconditionally overrides
gcc_cv_as_comdat_group and gcc_cv_as_comdat_group_percent passed via
environment
so we cannot even work around the problem #1 by supplying correct values
--
Summary: Misdetection of COMDAT group support
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: uwe at netbsd dot org
GCC build triplet: i386--netbsdelf
GCC host triplet: i386--netbsdelf
GCC target triplet: i386--netbsdelf
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30598
