[Bug rtl-optimization/31373] New: [4.2 Regression] -fsection-anchors causes multiple definitions

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

The testcase below causes multiple definitions if current_namespace with
compiling with -O on ppc and ppc64:

.LFE2:
        .size   _Z24add_defined_foreign_typev,.-_Z24add_defined_foreign_typev
        .section        ".bss"
        .align 2
        .set    .LANCHOR0,. + 0
        .type   current_namespace, @object
        .size   current_namespace, 4
current_namespace:
        .zero   4
        .type   current_namespace, @object
        .size   current_namespace, 4
current_namespace:
        .zero   4
        .section        .eh_frame,"a",@progbits

-fno-section-anchors fixes it.


void *f1();
void f2(void *);

static void *current_namespace = f1();

void *namespaced_name(void *ns = current_namespace);

void add_defined_foreign_type() {
  void *k;
  k = namespaced_name();
  f2(k); // make sure k isn't optimized out
}


-- 
           Summary: [4.2 Regression] -fsection-anchors causes multiple
                    definitions
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: blocker
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org
GCC target triplet: powerpc*-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31373