Update the Floss build process to utilize the new GN flag target_os and
environmental variable TARGET_OS_VARIENT to include
libstructuredmetrics when building for ChromeOS. Correct GN syntaxes.

BUG: 232098615
Tag: #floss
Test: ./build.py --target test
Test: emerge-${BOARD} floss

Change-Id: I0bf960751643f12f7e1ef03c7aa844d112fbb5d5

On cross-compiles, the main build was failing because //bt:tools was
dependending on //bt/system:tools which doesn't exist on cross-compile
builds. Thus, move the condition to //bt:tools instead.

Bug: 201687614
Tag: #floss
Test: emerge-arm-generic floss on ChromeOS
Change-Id: I915ef8f8fa80f4642972a9aec960b428c581360d

Ran a sed rule to replace most instances of //bt to //bt/system in all
BUILD.gn and *.gni files. Also made some manual changes to include
directories using packetgen and dumpsys to include bt/system/gd instead
of just bt/gd. Added a new BUILD.gn at root that just points to
system/BUILD.gn.

On the Rust side, updated the Cargo.toml paths and build.rs includes for
topshim.

Bug: 205591223
Test: Run `./build.py`
Tag: #floss
Change-Id: Ib6b9b991f140742d765a1031c8f4085aba9ce552

This reverts commit ddd429fe.

As it turns out, we will need to change //bt to //bt/system after all
because the ChromeOS ebuild can't easily handle the subdirectory change
otherwise.

Bug: 205591223
Test: Run `./build.py`
Tag: #floss
Change-Id: I620221cb589712dfc1f84c7ea87a175634a86250

Bug: 205591223
Test: Run `./build.py`
Tag: #floss
Change-Id: Ibc75b1e171013a24826c8b5f5cbc7b8fbf605547

Due to the use of multiple build systems, link dependencies between C++
and Rust where C++ does the final linking will fail. Until we have full
Bazel build, we can't enable these tests again.

Bug: 190750167
Tag: #floss
Test: Build for Linux
Change-Id: Iadd7dafe9635f606c2289eb246e3e2eb4931e92c

Separate hci_hal_host (linux socket-based) and rootcanal
implementation, since they are different.  We get an entire packet
through linux socket, but we get a tcp stream from rootcanal, so
handling of the incoming packets are different.

Fix the crash when we block at reading HCI reset response.

Test: run gd on chrome os
Tag: #stability
Bug: 181909671
Change-Id: I194744e61cf20f003a117405a20570a94382bce6

Rather than using C++ binaries to link with Rust staticlib, we do it the
other way around. This allows us to write our dbus frontend with Rust
instead.

Bug: 179821440
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: I63037e0aaea152a4855e0a49971c1b2f9c312ac5

OS_GENERIC is used for host tests and Linux builds but it unfortunately
puts everything at the current working directory. Add a TARGET_FLOSS
define so that we can put them at absolute locations (i.e.
/etc/bluetooth).

Bug: 186442862
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: I1c9aaacd1b36b80523437b050d2232b7e5bba47c

While building for Linux on cloudtop, a few more problems were
identified in the build. There were a couple of missing #include and
some incomplete struct definitions in btm_int_types.h. Also put
statslog.h behind an #ifdef OS_ANDROID.

Bug: 184975659
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: Ic2272a3acfa66259e692db280b48b4ddadff2171

Move the dependency to use the target included in
//external/proto_logging instead. This will be provided via cros_workon
for ChromeOS and in the prepared platform-dir for Linux build.

Bug: 176847256
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: I86da8ca8e7b666ccdc4cc36680f90083bbe76dfb

For ChromeOS/Linux, we want to build a static libbluetooth to make it
easier to find build breakages earlier and to simplify some of the build
issues. This change adds a compile time define to choose between using
dlsym to load libbluetooth and using extern to access the symbols
directly.

Bug: 176847256
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: I818c0f4a7baf414e73dc6f6ae73bb3e3bc3f357f

This has a large number of fixes to build on Linux/ChromeOS. In general,
it is making sure the BUILD.gn and Android.bp for a directory structure
match and it has all the configs + deps needed to build.

Besides a number of simple fixups (missing headers), there are also
a few abstractions that need to be noted:

* All of audio HAL is stubbed out (using the host implementation)
* Parameter provider and system_properties (under gd/os) now have
  a linux variant that changes where configuration files are kept. The
  current location for linux is now /etc/systembt. This implementation
  was copied from the host versions (which seems to be used for host
  testing).

Bug: 176847256
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: I1a6b3b362cedbe5f675794a115a330cc7f85f9c1

This adds GN builds for main/shim, along the way adding some fixes:
* Add message_loop_thread_bridge_header to use Rust's message loop
* Add some missing includes
* Build files for dumpsys
* Add gd/hci gn build

Bug: 176847216
Tag: #refactor
Test: atest --host bluetooth_test_common

Change-Id: Ide1edbb70076c4dcc4a4e6ee41303a9e315d52af

* Add missing GN files
* Move test targets under use.test
* Move non-standard codec targets under use.bt_nonstandard_codecs
* Add missing source files

Bug: 177961465
Tag: #refactor
Test: atest --host bluetooth_test_common

Change-Id: Ib7ba2705b2fd53d4c4d87916e99f35e7fce6c98e

Fix up all the .gn files so that they will compile on Linux. In order to
compile with GN, there is a new dependency on common-mk (currently part
of chromiumos/platform2) and most third-party libraries now use
pkg-config to include and link. As a result, all build paths are
prefixed with //bt now.

In addition, also disable building non standard codecs temporarily (i.e.
ldac, aptx, aac). We will add a way to enable them via build flags later
but we're disabling them entirely for now.

Bug: 176847216
Bug: 176846220
Tag: #refactor
Test: run --host bluetooth_test_gd
Test: run --host bluetooth_test_common
Change-Id: I85e5f8bd64c9ad074537cdd1393d373d5644aca0

* Health Device Profile (HDP) and MCAP protocol has been largely
  replaced by BLE. New applications should use Bluetooth Low Energy
  instead of legacy Bluetooth Health Device Profile

Bug: 111562841
Test: make, unit test, use Bluetooth
Change-Id: I3da1173a8a928af4b26a29e71746241c22af2236
Merged-In: I3da1173a8a928af4b26a29e71746241c22af2236
(cherry picked from commit 8e5dff56)

* Health Device Profile (HDP) and MCAP protocol has been largely
  replaced by BLE. New applications should use Bluetooth Low Energy
  instead of legacy Bluetooth Health Device Profile

Bug: 111562841
Test: make, unit test, use Bluetooth
Change-Id: I3da1173a8a928af4b26a29e71746241c22af2236

Test: Comment changes only; still compiles...
Change-Id: Id699a8170112f06e4a2c9f2e0f0834d1817ace4e

Also rename the build goal for both the library.

Bug: 67853426
Test: run Bluetooth
Change-Id: Ic5bd27f10ade0b068057049dd98c09e082cafee1

* Add a command line tool for MCAP related tests
* This tool can access the Bluetooth stack via a command line program
* Type "help" to obtain a list of available console commands in this
  Bluetooth
* Bluetooth must be disabled when this tool is running

Bug: 37867299
Test: make, PTS MCAP test
Change-Id: I106e6625ee8a29b7fdad88cdfeb99419054ef771

Test: manual
Change-Id: I5c86e96b9bb1cee5b535ea1fa6ba0b6d078a9b09
(cherry picked from commit 17f449dab52a6092422a0405e6fe589488661594)

Test: manual
Change-Id: I5c86e96b9bb1cee5b535ea1fa6ba0b6d078a9b09

uprev build/secondary/third_party/**/BUILD.gn"
Other BUILD.gn files were updated to match current state of project.

Change-Id: Ie895d25680d510f5e69e6f15553311f6671cdce3

uprev build/secondary/third_party/**/BUILD.gn"
Other BUILD.gn files were updated to match current state of project.

Change-Id: Ie895d25680d510f5e69e6f15553311f6671cdce3

This makes net_test_bluetooth compile.

Bug: 21584091

Change-Id: Id0c3d6bdcfd6f2c75c749e7f5a306645371fbb25

HciTransport checks for write-readiness before sending any packets
back to the HCI. Packets are maintained on a queue and only written
when the EPOLLOUT flag is set in the epoll_event.

Bug: 21586676
Change-Id: Iebd9599286b62746e2be7e424c522058ae978bb1

This patch makes the Bluetooth system service (service/) buildable using GN:

1. Added new BUILD.gn file for service/
2. Added conditional compilation for global config paths, with TODOs for
generalizing them later.
3. Added a shim for loading the Bluetooth library that calls hw_get_module on
Android and explicitly calls dlopen on OS_GENERIC.
4. Fixed compile warnings and errors.
5. Did some minor clean up in gatt_server.cpp for better readability.

Bug: 22124644
Change-Id: I3226537a3a5211a6762651a35707638df29956b0

BUG=21339022

Change-Id: I946fad7bf8116054f9081e064748793e79a6f85a

BUG=20491586