Remove all invocations of SetSubDirSupportedPlatformsBeOSCompatible.

ScreenSaver: Rename BuildScreenSaverDefaultSettingsView

...to just DefaultSettingsView

It is just as obvious what it does in context, but shorter.

Rename the function it contains from
BuildDefaultScreenSaverSettingsView to
BuildDefaultSettingsView

Use libstdc++, libsupc++ and libgcc from gcc_syslibs.

* Instead of faking libstdc++.so from libstdc++.a, use libstdc++.so
from the gcc_syslibs build feature for everything except x86_gcc2.
* Use libgcc_s.so from the gcc_syslibs build feature for everything but
x86_gcc2 (which still carries libgcc as part of libroot.so).
* Drop filtering of libgcc objects for libroot, as that is no longer
necessary since we're only using libgcc-as-single-object for libroot
with x86_gcc2, where the filtered object file doesn't exist. Should
the objects that used to be filtered cause any problems as part of
libgcc_s.so, we can always filter them as part of the gcc build.
* Use libsupc++.so from the gcc_syslibs build feature for everything but
x86_gcc2.
* Adjust all Jamfiles accordingly.
* Deactivate building of faked libstdc++.so for non-x86-gcc2. For
x86_gcc2, we still build libstdc++.so from the sources in the Haiku
source tree as part of the Haiku build .
* Put gcc_syslibs package onto the image, when needed.

GL: Remove OpenGL kit, x86 Mesa

* Depend on Mesa packages to provide functionality

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).

Update glu and mesa package

Also use the new build feature rules.

GL: Remove gcc2 no-warning hacks

* Solved in hrev45296 through updated package
* Resolves #8882

GL: Make sure to use GLU headers.

* The HEADERS_DEPENDENCY isn't needed
for GLU as Mesa is a dependency and requires
GLU to build
* I actually didn't break the build,
we were however using the Mesa GLU headers
with the external GLU lib which could be bad

glife: Enable in Jamfiles / build system

screen_savers: Initial import of GLife

* Donated to Haiku by author (Aaron Hill) under
the MIT license.
* Resources conveted to rdef
* Headers cleaned up
* Jamfile created

Use libstdc++, libsupc++ and libgcc from gcc_syslibs.

* Instead of faking libstdc++.so from libstdc++.a, use libstdc++.so
from the gcc_syslibs build feature for everything except x86_gcc2.
* Use libgcc_s.so from the gcc_syslibs build feature for everything but
x86_gcc2 (which still carries libgcc as part of libroot.so).
* Drop filtering of libgcc objects for libroot, as that is no longer
necessary since we're only using libgcc-as-single-object for libroot
with x86_gcc2, where the filtered object file doesn't exist. Should
the objects that used to be filtered cause any problems as part of
libgcc_s.so, we can always filter them as part of the gcc build.
* Use libsupc++.so from the gcc_syslibs build feature for everything but
x86_gcc2.
* Adjust all Jamfiles accordingly.
* Deactivate building of faked libstdc++.so for non-x86-gcc2. For
x86_gcc2, we still build libstdc++.so from the sources in the Haiku
source tree as part of the Haiku build .
* Put gcc_syslibs package onto the image, when needed.

GL: Remove OpenGL kit, x86 Mesa

* Depend on Mesa packages to provide functionality

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).

Update glu and mesa package

Also use the new build feature rules.

GL: Remove gcc2 no-warning hacks

* Solved in hrev45296 through updated package
* Resolves #8882

GL: Make sure to use GLU headers.

* The HEADERS_DEPENDENCY isn't needed
for GLU as Mesa is a dependency and requires
GLU to build
* I actually didn't break the build,
we were however using the Mesa GLU headers
with the external GLU lib which could be bad

glife: Enable in Jamfiles / build system

screen_savers: Initial import of GLife

* Donated to Haiku by author (Aaron Hill) under
the MIT license.
* Resources conveted to rdef
* Headers cleaned up
* Jamfile created