libroot/arm: Add generic_stack_trace.

Fixes the link of libroot_debug. Now Haiku ARM bootstrap builds
complete successfully!

ARM: only enable C++11 for libroot, not globally

This resembles the x86_64 build, and fixes the compilation issues
with the bootloader stdio.h header.

Fixes #11144

kernel, libroot: use C++11 atomics in atomic_*()

The less assembler in our sources the better. These functions wouldn't
be used very much since SupportDef.h inlines them, but the symbols should
be available.

Signed-off-by: Paweł Dziepak <pdziepak@quarnos.org>

Reimplemented atomic_get_and_set in C++.

Signed-off-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

* C++ code written by pdziepak.

Import stdatomic.c from freebsd for ARM port

* Fixes missing atomic stuff that gcc requires
* The gcc build still fails further down, because of a mixup of
VFP/nonVFP objects (at least for beagle build).

More work towards hybrid support

* All packaging architecture dependent variables do now have a
respective suffix and are set up for each configured packaging
architecture, save for the kernel and boot loader variables, which
are still only set up for the primary architecture.
For convenience TARGET_PACKAGING_ARCH, TARGET_ARCH, TARGET_LIBSUPC++,
and TARGET_LIBSTDC++ are set to the respective values for the primary
packaging architecture by default.
* Introduce a set of MultiArch* rules to help with building targets for
multiple packaging architectures. Generally the respective targets are
(additionally) gristed with the packaging architecture. For libraries
the additional grist is usually omitted for the primary architecture
(e.g. libroot.so and <x86>libroot.so for x86_gcc2/x86 hybrid), so that
Jamfiles for targets built only for the primary architecture don't
need to be changed.
* Add multi-arch build support for all targets needed for the stage 1
cross devel package as well as for libbe (untested).

ARM/libroot: stub out the missing functions for now

This will get libroot.so to build, which should give us much more compilation
coverage for ARM now too. Will have to go through all the libroot code with
a tooth comb anyway once userland comes up...

(Will consider replacing the glibc mess with bsd for all non gcc2 platforms)

arm: added some missing arch bits and changed asm section for arm compat.

ARM: only enable C++11 for libroot, not globally

This resembles the x86_64 build, and fixes the compilation issues
with the bootloader stdio.h header.

Fixes #11144

kernel, libroot: use C++11 atomics in atomic_*()

The less assembler in our sources the better. These functions wouldn't
be used very much since SupportDef.h inlines them, but the symbols should
be available.

Signed-off-by: Paweł Dziepak <pdziepak@quarnos.org>

Reimplemented atomic_get_and_set in C++.

Signed-off-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

* C++ code written by pdziepak.

Import stdatomic.c from freebsd for ARM port

* Fixes missing atomic stuff that gcc requires
* The gcc build still fails further down, because of a mixup of
VFP/nonVFP objects (at least for beagle build).

More work towards hybrid support

* All packaging architecture dependent variables do now have a
respective suffix and are set up for each configured packaging
architecture, save for the kernel and boot loader variables, which
are still only set up for the primary architecture.
For convenience TARGET_PACKAGING_ARCH, TARGET_ARCH, TARGET_LIBSUPC++,
and TARGET_LIBSTDC++ are set to the respective values for the primary
packaging architecture by default.
* Introduce a set of MultiArch* rules to help with building targets for
multiple packaging architectures. Generally the respective targets are
(additionally) gristed with the packaging architecture. For libraries
the additional grist is usually omitted for the primary architecture
(e.g. libroot.so and <x86>libroot.so for x86_gcc2/x86 hybrid), so that
Jamfiles for targets built only for the primary architecture don't
need to be changed.
* Add multi-arch build support for all targets needed for the stage 1
cross devel package as well as for libbe (untested).

ARM/libroot: stub out the missing functions for now

This will get libroot.so to build, which should give us much more compilation
coverage for ARM now too. Will have to go through all the libroot code with
a tooth comb anyway once userland comes up...

(Will consider replacing the glibc mess with bsd for all non gcc2 platforms)

arm: added some missing arch bits and changed asm section for arm compat.