66d21d4a30
We've considered these deprecated for a while, and have reduced where they may be used, but let's actually throw warnings and call them out specifically now. Bug: 130719878 Test: lunch aosp_arm; m nothing [see no warnings] Test: lunch aosp_crosshatch; m nothing [see LOCAL_COPY_HEADERS warnings] Test: lunch aosp_taimen; m nothing [see BUILD_COPY_HEADERS warnings] Change-Id: I8c12012366d84667de0d223bbde38d8b90419e36
69 lines
3.3 KiB
Markdown
69 lines
3.3 KiB
Markdown
# Deprecation of Make
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We've made significant progress converting AOSP from Make to Soong (Android.mk
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to Android.bp), and we're ready to start turning off pieces of Make. If you
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have any problems converting, please contact us via:
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* The [android-building@googlegroups.com] group.
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* Our [public bug tracker](https://issuetracker.google.com/issues/new?component=381517).
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* Or privately through your existing contacts at Google.
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## Status
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[build/make/core/deprecation.mk] is the source of truth, but for easy browsing:
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| Module type | State |
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| -------------------------------- | --------- |
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| `BUILD_AUX_EXECUTABLE` | Error |
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| `BUILD_AUX_STATIC_LIBRARY` | Error |
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| `BUILD_COPY_HEADERS` | Warning |
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| `BUILD_HOST_FUZZ_TEST` | Error |
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| `BUILD_HOST_NATIVE_TEST` | Error |
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| `BUILD_HOST_SHARED_LIBRARY` | Warning |
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| `BUILD_HOST_SHARED_TEST_LIBRARY` | Error |
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| `BUILD_HOST_STATIC_LIBRARY` | Warning |
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| `BUILD_HOST_STATIC_TEST_LIBRARY` | Error |
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| `BUILD_HOST_TEST_CONFIG` | Error |
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| `BUILD_NATIVE_BENCHMARK` | Error |
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| `BUILD_SHARED_TEST_LIBRARY` | Error |
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| `BUILD_STATIC_TEST_LIBRARY` | Error |
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| `BUILD_TARGET_TEST_CONFIG` | Error |
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| `BUILD_*` | Available |
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## Module Type Deprecation Process
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We'll be turning off `BUILD_*` module types as all of the users are removed
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from AOSP (and Google's internal trees). The process will go something like
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this, using `BUILD_PACKAGE` as an example:
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* Prerequisite: all common users of `BUILD_PACKAGE` have been removed (some
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device-specific ones may remain).
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* `BUILD_PACKAGE` will be moved from `AVAILABLE_BUILD_MODULE_TYPES` to
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`DEFAULT_WARNING_BUILD_MODULE_TYPES` in [build/make/core/deprecation.mk]. This
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will make referring to `BUILD_PACKAGE` a warning.
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* Any devices that still have warnings will have
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`BUILD_BROKEN_USES_BUILD_PACKAGE := true` added to their `BoardConfig.mk`.
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* `BUILD_PACKAGE` will be switched from `DEFAULT_WARNING_BUILD_MODULE_TYPES` to
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`DEFAULT_ERROR_BUILD_MODULE_TYPES`, which will turn referring to
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`BUILD_PACKAGE` into an error unless the device has overridden it.
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* At some later point, after all devices in AOSP no longer set
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`BUILD_BROKEN_USES_BUILD_PACKAGE`, `BUILD_PACKAGE` will be moved from
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`DEFAULT_ERROR_BUILD_MODULE_TYPES` to `OBSOLETE_BUILD_MODULE_TYPES` and the
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code will be removed. It will no longer be possible to use `BUILD_PACKAGE`.
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In most cases, we expect module types to stay in the default warning state for
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about two weeks before becoming an error by default. Then it will spend some
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amount of time in the default error state before moving to obsolete -- we'll
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try and keep that around for a while, but other development may cause those to
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break, and the fix may to be to obsolete them. There is no expectation that the
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`BUILD_BROKEN_USES_BUILD_*` workarounds will work in a future release, it's a
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short-term workaround.
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Just to be clear, the above process will happen on the AOSP master branch. So
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if you're following Android releases, none of the deprecation steps will be in
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Android Q, and the 2020 release will have jumped directly to the end for many
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module types.
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[android-building@googlegroups.com]: https://groups.google.com/forum/#!forum/android-building
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[build/make/core/deprecation.mk]: /core/deprecation.mk
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