| Building with GN+ninja |
| ====================== |
| |
| system/bt is buildable using the GN and and ninja buildtools from the Chromium |
| project. After setting up these tools, several third_party packages need to be |
| set up to build the stack. It's a simple matter of copying (or sym-linking) some |
| packages out of AOSP into "system/bt/third_party": |
| |
| From AOSP: |
| 1. "platform/external/libevent" => third_party/libevent. The relevant |
| headers here are "event.h" and "event-config.h". event-config.h from |
| external/libevent is only compatible on Android; this means that you will need |
| to generate a new one based on the current platform. Please follow the |
| instructions in external/libevent/README.android for instructions on how to |
| generate this file. |
| 2. "platform/external/libchrome" => third_party/libchrome. After that, remove |
| the BUILD.gn file that's in libchrome/base. This is a legacy file that only |
| works inside the Chromium project and we're using our own from secondary build |
| sources. |
| 3. "platform/external/modp_b64" => third_party/modp_b64 |
| 4. "platform/external/tinyxml2" => third_party/tinyxml2 |
| |
| From Chromium: |
| 1. "src/testing/gtest" => third_party/gtest |
| |
| You will also need a fresh checkout of platform/hardware/libhardware and |
| platform/system/core for some include dependencies. |
| |
| BUILD.gn files for all of these packages have already been set up under |
| "system/bt/build/secondary/third_party" (note: we don't have a BUILD.gn file for |
| modp_b64 since it comes with its own; as the package was imported into AOSP from |
| Chromium). To build, run: |
| |
| 1. 'gn args out/Default': This will prompt you to fill the contents of your |
| "args.gn" file. Set the two following variables: |
| a. libhw_include_path=<path to your "platform/hardware/libhardware/include"> |
| b. core_include_path=<path to your "platform/system/core/include"> |
| |
| Once done, this will create the *.ninja files for the entire project. |
| |
| 2. 'ninja -C out/Default all': This will build all targets (the shared library, |
| executables, tests, etc) and put them in out/Default (or whatever you named the |
| output directory. To build an individual target, replace "all" with the target |
| of your choice, e.g. 'ninja -C out/Default net_test_osi'. |