Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

META MODE: Don't create .meta files when symlinking sources into the obj directory.

Tracking these leads to situations where meta mode will consider the
file to be out of date if /bin/sh or /bin/ln are newer than the source
file. There's no reason for meta mode to do this as make is already
handling the rebuild dependency fine.

Sponsored by: EMC / Isilon Storage Division

Remove MK_ARM_EABI, the armeb issues have been fixed. The code to support
the oabi is still in the tree, but it is expected this will be removed
as developers work on surrounding code.

With this commit the ARM EABI is the only supported supported ABI by
FreeBSD on ARMa 32-bit processors.

X-MFC after: never
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D876

Allow libstdc++ and libsupc++ to compile with clang again, after the
bsd.*.mk infrastructure changes. Apparently, you must now modify
CXXFLAGS *before* including bsd.lib.mk, or your changes will be lost.

Use src.opts.mk in preference to bsd.own.mk except where we need stuff
from the latter.

To avoid having to explicitly test COMPILER_TYPE for setting
clang-specific or gcc-specific flags, introduce the following new
variables for use in Makefiles:

CFLAGS.clang
CFLAGS.gcc
CXXFLAGS.clang
CXXFLAGS.gcc

In bsd.sys.mk, these get appended to the regular CFLAGS or CXXFLAGS for
the right compiler.

MFC after: 1 week

After r255321, clang uses libc++ by default. This leads to a lot of
errors when you enable WITH_GNUCXX to build libstdc++, since it will
include C++ headers from the libc++ installation under ${WORLDTMP}, and
those are not compatible with libstdc++ at all.

To fix this, add -stdlib=libstdc++ to CXXFLAGS when building libstdc++
(and its companion libsupc++) with clang.

Approved by: re (delphij)

As it's done for libstdc++, use SJLJ-based exceptions on arm when we're not
using EABI, and use unwind-arm.h instead of unwind-generic.h when using EABI.

For building GNU libstdc++ and libsupc++, filter out libc++-specific and
-std= flags above c++98 or gnu++98 from CXXFLAGS *after* including
bsd.lib.mk, otherwise some additions to CXXFLAGS done in bsd.*.mk might
not be preserved.

MFC after: 1 week

For building libstdc++ and libsupc++, filter out any -stdlib=libc++
option from CXXFLAGS, otherwise these libraries will not build.
Similarly, filter out any -std=xxx options that aren't supported.

Submitted by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>
MFC after: 2 weeks

Make libsupc++ build as a shared library and make libstdc++ a filter library
for it.

This allows people to swap out libsupc++ for libcxxrt easily, so we can begin
the libstdc++ -> libc++ migration.

Approved by: dim (mentor)

Non-GCC gcc compatible compilers may provide the same multimedia intrinsic
headers as GCC, but of their own implementation. So put the GCC ones into
their own header "namespace".

Requested by: ed

Use the new PO_CXXFLAGS from r202807 to remove the '-ffunction-sections'
flag when compiling profiled objects as it's ignored by the compiler.
This removes the associated warning for each file compiled.

MFC after: 1 month

Update bmake glue to build GCC 4.2.

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.

Update libsupc++ to include missing files. This was fixed in libstdc++
a long time ago, but libsupc++ was left out somehow,

PR: gnu/99702
Submitted by: George Mitchell

Repeatability is Considered Good when building this library, too. (And
I think this is the last one which needs it.)

Bmake glue for GCC 3.4.2-prerelease.

Update bmake bits to build GCC 3.3.1-prerelease.

Add some build glue for libstdc++. I'm not a C++ person, but this seems
to work at least for the non-hairy stuff. The main wrinkle here is that
a whole mess of include files get installed and under different names.
An earlier version of this built a shadow include tree first in the obj
directory, but this depends on the 'make includes' functionality.

More tweaking is certainly going to be needed.

Added new bsd.incs.mk which handles installing of header files
via INCS. Implemented INCSLINKS (equivalent to SYMLINKS) to
handle symlinking include files. Allow for multiple groups of
include files to be installed, with the powerful INCSGROUPS knob.
Documentation to follow.

Added standard `includes' and `incsinstall' targets, use them
in Makefile.inc1. Headers from the following makefiles were
not installed before (during `includes' in Makefile.inc1):

kerberos5/lib/libtelnet/Makefile
lib/libbz2/Makefile
lib/libdevinfo/Makefile
lib/libform/Makefile
lib/libisc/Makefile
lib/libmenu/Makefile
lib/libmilter/Makefile
lib/libpanel/Makefile

Replaced all `beforeinstall' targets for installing includes
with the INCS stuff.

Renamed INCDIR to INCSDIR, for consistency with FILES and SCRIPTS,
and for compatibility with NetBSD. Similarly for INCOWN, INCGRP,
and INCMODE.

Consistently use INCLUDEDIR instead of /usr/include.

gnu/lib/libstdc++/Makefile and gnu/lib/libsupc++/Makefile changes
were only lightly tested due to the missing contrib/libstdc++-v3.
I fully tested the pre-WIP_GCC31 version of this patch with the
contrib/libstdc++.295 stuff.

These changes have been tested on i386 with the -DNO_WERROR "make
world" and "make release".

Bmake bits for Gcc 3.1.

Partially made possible by: Wilko.Bulte@compaq.com

GCC's libstdc++ version 3 has the "libgcc" like bits (start up / terminate
code, `new' handler, exception handling, etc.) split out into libsupc++.