Modify some documentation details

Closes https://github.com/dart-lang/sdk/pull/60287

GitOrigin-RevId: 284881fea53ecb86aeba413fe3e60089287ea311
Change-Id: Iaf695a524ec7bc7d604b7b176b77155a9707d662
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/414481
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>

README.md

@@ -57,7 +57,7 @@ There are more documents in our repo at [docs](https://github.com/dart-lang/sdk/
 
 ## Contributing to Dart
 
-The easiest way to contribute to Dart is to [file issues][dartbug].
+The easiest way to contribute to Dart is to [file issues][issues].
 
 You can also contribute patches, as described in [Contributing][contrib].
 
@@ -69,12 +69,12 @@ Future plans for Dart are included in the combined Dart and Flutter
 [building]: https://github.com/dart-lang/sdk/blob/main/docs/Building.md
 [codelabs]: https://dart.dev/codelabs
 [contrib]: https://github.com/dart-lang/sdk/blob/main/CONTRIBUTING.md
-[dartbug]: http://dartbug.com
+[issues]: https://github.com/dart-lang/sdk/issues
 [lang]: https://dart.dev/guides/language/language-tour
 [license]: https://github.com/dart-lang/sdk/blob/main/LICENSE
 [patent_grant]: https://github.com/dart-lang/sdk/blob/main/PATENT_GRANT
 [pubsite]: https://pub.dev
 [repo]: https://github.com/dart-lang/sdk
-[roadmap]: https://github.com/flutter/flutter/wiki/Roadmap
+[roadmap]: https://github.com/flutter/flutter/blob/master/docs/roadmap/Roadmap.md
 [tools]: https://dart.dev/tools
 [website]: https://dart.dev

docs/Building-Dart-SDK-for-ARM-or-RISC-V.md

@@ -2,6 +2,8 @@
 
 The Dart VM runs on a variety of ARM processors on Linux and Android. This document explains how to build the Dart VM and SDK to target these platforms.
 
+> **Note**: You must follow the steps in [Building.md](https://github.com/dart-lang/sdk/blob/main/docs/Building.md) to set up the environment and properly fetch the source code. Cloning the repository or obtaining the source code through other means will not result in a successful build.
+
 # Cross-compiling
 
 The build scripts download a Clang toolchain that can target IA32, X64, ARM, ARM64 or RISCV64 and run on an X64 or ARM64 host. For these cases, you do not need to install a cross-compiler yourself. For other cases, like building on a RISCV64 host or targeting RISCV32, you will need to manually install a toolchain.

docs/README.md

@@ -14,7 +14,7 @@ Important pages include:
 - [Testing](Testing.md)
 
 Also, check out the combined
-[Dart and Flutter roadmap](https://github.com/flutter/flutter/wiki/Roadmap)
+[Dart and Flutter roadmap](https://github.com/flutter/flutter/blob/master/docs/roadmap/Roadmap.md)
 on the Flutter wiki.
 
 ## Process pages