'RELENG_7_0_0_RELEASE'.

This commit was manufactured to restore the state of the 7.0-RELEASE image.

support for these. This is in line with gnu/lib/libgomp/config.h and
gnu/lib/libstdc++/config.h.

Reviewed by:	cognet, obrien
Approved by:	re (kensmith)

This was lost while migrating to gcc4.

Reported by:	Michael Reifenberger <mike at Reifenberger dot com>
Approved by:	re (blanket)

GCC.

Reported by: bz

that the build failure was caused by a computer/sources date/time
mismatch that caused GCC tools to be mistakenly rebuilt again at
an inappropriate time during buildworld, re-linking them against
new libraries instead of host's installed libraries and thus making
them not runnable by the host.  Normally they are only built in
the early stage of buildworld (build-tools) that links them against
shared libraries of the host, but if either the system clock or
modification date/time on source files is set incorrectly, make(1)
can be foolished into thinking that tools are stale and will rebuild
them again, now in the "target" environment which is not suitable
for building helper apps that are to be run during buildworld.

OK'ed by:	kan

Blame-to: cperciva

Also:
        Switch FreeBSD to use libgcc_s.so.1.

        Use dl_iterate_phdr to locate shared objects' exception frame
        info instead of depending on older register_frame_info machinery.
        This allows us to avoid depending on libgcc_s.so.1 in binaries
        that do not use exception handling directly. As an additional
        benefit it breaks circular libc <=> libgcc_s.so.1 dependency too.

        Build newly added libgomp.so.1 library, the runtime support
        bits for OpenMP.

        Build LGPLed libssp library. Our libc provides our own
        BSD-licensed SSP callbacks implementation, so this library
        is only built to benefit applications that have hadcoded
        knowledge of libssp.so and libssp_nonshared.a. When linked
        in from command line, these libraries override libc
        implementation.

'target'. Latter is problematic in particular as apparently FreeBSD's
bsd.prog.mk re-defines it under some circumstances. This causes an
unexpected failures like -dumpmachine not working for cc while working
fine for c++.

Do not re-define IN_GCC in multipe places, it gets inherited from
Makefile.in anyway.

PR:		gnu/110143
Submitted by:	usleepless at gmail