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Alexander Aprelev dbe8f6a9df Revert "[build] Rely on default host os TARGET_OS unless cross-compiling." 
This reverts commit 4167867bb2 as it
breaks arm gen_snapshot that are build on linux:

```
$  python tools/build.py -mrelease -aarm --os=android dart process_test runtime_precompiled
using /run/user/276040/goma_aam as tmpdir
Auto update is skipped because latest/MANIFEST was updated recently.
Using goma VERSION=181 (latest)
GOMA version 2cc1b3e007b13ab21f982568ba6518c1c29d09e5@1567062346

goma is already running.

ninja -C out/ReleaseAndroidARM -j1000 -l64 dart process_test runtime_precompiled
ninja: Entering directory `out/ReleaseAndroidARM'
[1/1] Regenerating ninja files
current_toolchain //build/toolchain/android:clang_arm
host_toolchain //build/toolchain/linux:clang_x86
dart_host_toolchain //build/toolchain/linux:clang_x86
current_toolchain //build/toolchain/linux:clang_x86
host_toolchain //build/toolchain/linux:clang_x86
dart_host_toolchain //build/toolchain/linux:clang_x86
...

$ python tools/test.py -n dartkp-android-release-arm ffi/data_not_asan_test
...
--- Command "precompiler" (took 39ms):
DART_CONFIGURATION=ReleaseAndroidARM out/ReleaseAndroidARM/clang_x86/gen_snapshot --snapshot-kind=app-aot-elf --elf=/usr/local/google/home/aam/p/d/dart-sdk/sdk/out/ReleaseAndroidARM/generated_compilations/dartkp/tests_ffi_data_not_asan_test/out.aotsnapshot --no-sim-use-hardfp --ignore-unrecognized-flags --packages=/usr/local/google/home/aam/p/d/dart-sdk/sdk/.packages /usr/local/google/home/aam/p/d/dart-sdk/sdk/out/ReleaseAndroidARM/generated_compilations/dartkp/tests_ffi_data_not_asan_test/out.dill

exit code:
255

stderr:
error: import of dart:ffi is not supported in the current Dart runtime

--- Re-run this test:
python tools/test.py -n dartkp-android-release-arm ffi/data_not_asan_test

```

Change-Id: Ib1d3d11fc7bdb138557cee363681718bc5e88e24
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/118474
Reviewed-by: Alexander Aprelev <aam@google.com>
2019-09-23 23:04:55 +00:00
.github Update new issue template. 2019-04-30 18:14:21 +00:00
benchmarks [vm/benchmark] Add *Bytes suffix to Isolate SendReceive benchmark 2019-09-05 15:25:33 +00:00
build Compile with -lpthread by default on linux. 2019-09-16 19:58:31 +00:00
client Remove old annotated_steps buildbot scripts and dispatcher 2017-05-23 16:17:02 +02:00
docs Updated spec_parser such that it runs with ANTLR v4 2019-03-19 14:06:26 +00:00
pkg Fix NPE when extension override is invoked without a call method (issue 38505) 2019-09-23 22:42:10 +00:00
runtime Revert "[build] Rely on default host os TARGET_OS unless cross-compiling." 2019-09-23 23:04:55 +00:00
samples Remove the old "preview Dart 2" flags from the test runner. 2019-09-05 16:59:43 +00:00
samples-dev Mass format python with yapf 2019-08-05 20:34:31 +00:00
sdk Fix some dart sdk documentation issues 2019-09-23 21:52:07 +00:00
sdk_nnbd Re-adding dart sdk version comment 2019-09-20 23:26:39 +00:00
tests Reland "[dartdevc] fix for const / overridden fields" 2019-09-23 21:31:49 +00:00
third_party [vm] Update wasmer and resolve a TODO. 2019-09-19 22:49:44 +00:00
tools [SDK] Adds dart2exe to create standalone executables. 2019-09-23 12:00:08 +00:00
utils [bazel] Sort certain things when compiling in incremental mode (take 2) 2019-09-20 13:12:55 +00:00
.clang-format VM: Re-format to use at most one newline between functions 2017-07-13 08:08:37 -07:00
.gitattributes Remove the Dart 1 tests. 2018-10-11 23:45:18 +00:00
.gitconfig [infra] Add documentation to .gitconfig 2018-06-11 18:24:16 +00:00
.gitignore Reland "[llvm] Add initial scaffolding" 2019-07-30 20:34:31 +00:00
.gn Starting work on full GN build 2016-09-23 07:47:36 -07:00
.mailmap fix my name in .mailmap 2018-09-11 01:45:52 +00:00
.packages [SDK] Adds dart2exe to create standalone executables. 2019-09-23 12:00:08 +00:00
.style.yapf Mass format python with yapf 2019-08-05 20:34:31 +00:00
.vpython [infra] Add .vpython spec to fix gsutil on the bots (#31065) 2018-10-11 15:11:35 +00:00
AUTHORS [ VM ] Updated splay-tree licenses, added V8 project authors to AUTHORS 2019-04-30 19:50:46 +00:00
BUILD.gn Add defined() guard for checkout_llvm build flag 2019-08-09 19:00:24 +00:00
CHANGELOG.md bump to linter 0.1.98 2019-09-23 22:19:00 +00:00
codereview.settings Update codereview.settings to Gerrit (dart-review.googlesource.com) 2017-09-04 12:52:09 +00:00
CONTRIBUTING.md Change wiki link to follow contents moved. 2019-01-12 18:46:22 +00:00
DEPS bump to linter 0.1.98 2019-09-23 22:19:00 +00:00
LICENSE Remove third_party licenses from LICENSE 2019-08-21 07:43:34 +00:00
PATENT_GRANT Rename patent file 2019-08-16 12:03:17 +00:00
PRESUBMIT.py [infra] Check whether sdk and sdk_nnbd are in sync on presubmit. 2019-09-11 10:42:35 +00:00
README.dart-sdk remove docgen from the sdk 2015-09-18 13:18:10 -07:00
README.md Update README.md 2019-08-16 12:24:02 +00:00
WATCHLISTS Auto-CC dart2js on changes to the js_runtime sdk. 2019-09-12 18:17:38 +00:00

README.md

Dart

A client-optimized language for fast apps on any platform

Dart is:

  • Optimized for UI: Develop with a programming language specialized around the needs of user interface creation

  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app

  • Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web

Dart has flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:

  • Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.

  • Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).

Dart platforms illustration

License & patents

Dart is free and open source.

See LICENSE and PATENT_GRANT.

Using Dart

Visit the dart.dev to learn more about the language, tools, getting started, and more.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

Building Dart

If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.

There are more documents on our wiki.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.