Add a features.h to auto enable _DEFAULT_SOURCE

Unless __STRICT_ANSI__ is defined (as it is when running the compiler in
--std=c89 or --std=c99, but not when running it without any specific
args), we can enable these by default and behave like most other
systems. I don't know why no one has done this yet despite suggesting it
multiple times and people prefer to #define _BSD_SOURCE manually
everywhere.

Remove all places in our Jamfiles and sources where it had been defined.
_DEFAULT_SOURCE is now enabled by default for all sources of Haiku, since we
let the compiler use GNU extensions (no strict C standard specified on
command line)

Use _DEFAULT_SOURCE as the define name to match current versions of
glibc. Enable it if _BSD_SOURCE is #defined in compiler flags, for
backward compatibility.

Change-Id: I6db04da5f6db437723cdfba3478f5094a69d7727
Reviewed-on: https://review.haiku-os.org/c/1633
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

Protect all BSD extensions with _BSD_SOURCE

* Do not define the symbols by default, as they are not in the default
libraries.
* Adjust jamfiles of all code using BSD extensions to define
_BSD_SOURCE.
* This makes Haiku slightly more compliant to standard C/POSIX.

Build media add-ons for secondary arch.

Fixes #10049.

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.

* merged 32bit-wchar_t branches of buildtools and haiku back into
the respective trunk

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31443 a95241bf-73f2-0310-859d-f6bbb57e9c96

Code style cleanup / honored 80 column line length limit. Modified FireWireDVAddOn to use BObjectList.
Feel free to chime in if I missed any style violations.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28000 a95241bf-73f2-0310-859d-f6bbb57e9c96

Add the current version of JiSheng Zhang's firewire_dv media add-on to the
build. This is mostly complete, excepting BBufferConsumer's virtuals are not
yet implemented, and needs more testing to ensure that the encoded stream is
correctly read from the camera, though based off preliminary tests by Francois,
detection/publishing at least seems to work.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27965 a95241bf-73f2-0310-859d-f6bbb57e9c96

Protect all BSD extensions with _BSD_SOURCE

* Do not define the symbols by default, as they are not in the default
libraries.
* Adjust jamfiles of all code using BSD extensions to define
_BSD_SOURCE.
* This makes Haiku slightly more compliant to standard C/POSIX.

Build media add-ons for secondary arch.

Fixes #10049.

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.

* merged 32bit-wchar_t branches of buildtools and haiku back into
the respective trunk

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31443 a95241bf-73f2-0310-859d-f6bbb57e9c96

Code style cleanup / honored 80 column line length limit. Modified FireWireDVAddOn to use BObjectList.
Feel free to chime in if I missed any style violations.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28000 a95241bf-73f2-0310-859d-f6bbb57e9c96

Add the current version of JiSheng Zhang's firewire_dv media add-on to the
build. This is mostly complete, excepting BBufferConsumer's virtuals are not
yet implemented, and needs more testing to ensure that the encoded stream is
correctly read from the camera, though based off preliminary tests by Francois,
detection/publishing at least seems to work.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27965 a95241bf-73f2-0310-859d-f6bbb57e9c96