[Bug testsuite/51919] New: g++.dg/pch/mangle1.* test FAILs without LTO

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51919

             Bug #: 51919
           Summary: g++.dg/pch/mangle1.* test FAILs without LTO
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ro@gcc.gnu.org
                CC: jason@gcc.gnu.org
              Host: alpha-dec-osf5.1b
            Target: alpha-dec-osf5.1b
             Build: alpha-dec-osf5.1b


The new g++.dg/pch/mangle1.* test FAILs on Tru64 UNIX, which has no LTO
support:

FAIL: ./mangle1.H  -g (test for excess errors)
FAIL: g++.dg/pch/mangle1.C -g
FAIL: g++.dg/pch/mangle1.C -g assembly comparison
FAIL: ./mangle1.H  -O2 -g (test for excess errors)
FAIL: g++.dg/pch/mangle1.C -O2 -g
FAIL: g++.dg/pch/mangle1.C -O2 -g assembly comparison
FAIL: ./mangle1.H  -O2 (test for excess errors)
FAIL: g++.dg/pch/mangle1.C -O2
FAIL: g++.dg/pch/mangle1.C -O2 assembly comparison

Compiling mangle1.H gives

FAIL: ./mangle1.H  -g (test for excess errors)
Excess errors:
cc1plus: error: LTO support has not been enabled in this configuration

This one can be avoided with dg-require-effective-target lto.

The next two failures

pch file 'mangle1.H.gch' missing
FAIL: g++.dg/pch/mangle1.C -g
assembly file 'mangle1.s' missing

can not, unfortunately.  It seems that dg-pch.exp doesn't check for dg- 
directives in mangle1.C.

FAIL: g++.dg/pch/mangle1.C -g assembly comparison