[Bug bootstrap/64693] New: [5 Regression] PCH failed with LTO + profiledbootstrap

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64693

            Bug ID: 64693
           Summary: [5 Regression] PCH failed with LTO + profiledbootstrap
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com

On Linux/x86-64, r216320 configured with

--prefix=/usr/5.0.0 --enable-clocale=gnu --with-system-zlib --enable-shared
--with-demangler-in-ld --with-build-config=bootstrap-lto --disable-werror
--with-fpmath=sse --enable-languages=c,c++,fortran,java,lto,objc

and built with "make -j8 profiledbootstra" gave many PCH failures:

https://gcc.gnu.org/ml/gcc-regression/2014-10/msg00392.html

r216301 is OK.  r219883 still has those failures:

https://gcc.gnu.org/ml/gcc-testresults/2015-01/msg02251.html