[Bug target/80627] New: The Dart is crashing when glibc is compiled with arch armv7-a

["tomas_paukrt at conel dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80627

            Bug ID: 80627
           Summary: The Dart is crashing when glibc is compiled with arch
                    armv7-a
           Product: gcc
           Version: 7.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tomas_paukrt at conel dot cz
  Target Milestone: ---

I have found out that the Dart (https://www.dartlang.org/) is occasionally
crashing when glibc 2.25 is cross-compiled with options "--with-arch=armv7-a
--with-tune=cortex-a8 --with-fpu=vfpv3 --with-float=softfp". I have tested GCC
4.9.4, 5.4.0, 6.3.0 and 7.1.0 and all these versions produced "libc.so.6" that
does not work with the Dart. When I change option "with-arch" to "armv6" then
cross-compiled "libc.so.6" works with the Dart.


This is output of the Dart when running on system with "libc.so.6" compiled for
arch "armv7-a":

Dumping native stack trace for thread 530
  [0x008cf920] Unknown symbol
  [0x008cf920] Unknown symbol
-- End of DumpStackTrace
Aborted