tools: support full-icu by default

Instead of an English-only icudt64l.dat in the repo,
we now have icudt64l.dat.gz with all locales.

- updated READMEs and docs
- shrinker now copies source, and compresses (bzip2) the ICU data file
- configure expects deps/icu-small to be full ICU with a full
compressed data file

Fixes: https://github.com/nodejs/node/issues/19214
Co-Authored-By: Richard Lau <riclau@uk.ibm.com>
Co-Authored-By: Jan Olaf Krems <jan.krems@gmail.com>
Co-Authored-By: James M Snell <jasnell@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/29522

Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

1 files changed, 29 insertions, 18 deletions

diff --git a/BUILDING.md b/BUILDING.md
index 0e0379265f..aadba46020 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -35,21 +35,23 @@ file a new issue.
     * [Building Node.js](#building-nodejs-1)
   * [Android/Android-based devices (e.g. Firefox OS)](#androidandroid-based-devices-eg-firefox-os)
 * [`Intl` (ECMA-402) support](#intl-ecma-402-support)
-  * [Default: `small-icu` (English only) support](#default-small-icu-english-only-support)
   * [Build with full ICU support (all locales supported by ICU)](#build-with-full-icu-support-all-locales-supported-by-icu)
     * [Unix/macOS](#unixmacos)
     * [Windows](#windows-1)
-  * [Building without Intl support](#building-without-intl-support)
+  * [Trimmed: `small-icu` (English only) support](#trimmed-small-icu-english-only-support)
     * [Unix/macOS](#unixmacos-1)
     * [Windows](#windows-2)
-  * [Use existing installed ICU (Unix/macOS only)](#use-existing-installed-icu-unixmacOS-only)
-  * [Build with a specific ICU](#build-with-a-specific-icu)
+  * [Building without Intl support](#building-without-intl-support)
     * [Unix/macOS](#unixmacos-2)
     * [Windows](#windows-3)
+  * [Use existing installed ICU (Unix/macOS only)](#use-existing-installed-icu-unixmacOS-only)
+  * [Build with a specific ICU](#build-with-a-specific-icu)
+    * [Unix/macOS](#unixmacos-3)
+    * [Windows](#windows-4)
 * [Building Node.js with FIPS-compliant OpenSSL](#building-nodejs-with-fips-compliant-openssl)
 * [Building Node.js with external core modules](#building-nodejs-with-external-core-modules)
-  * [Unix/macOS](#unixmacos-3)
-  * [Windows](#windows-4)
+  * [Unix/macOS](#unixmacos-4)
+  * [Windows](#windows-5)
 * [Note for downstream distributors of Node.js](#note-for-downstream-distributors-of-nodejs)
 
 ## Supported platforms
@@ -598,31 +600,40 @@ $ make
 ## `Intl` (ECMA-402) support
 
 [Intl](https://github.com/nodejs/node/blob/master/doc/api/intl.md) support is
-enabled by default, with English data only.
+enabled by default.
 
-### Default: `small-icu` (English only) support
+### Build with full ICU support (all locales supported by ICU)
 
-By default, only English data is included, but
-the full `Intl` (ECMA-402) APIs.  It does not need to download
-any dependencies to function. You can add full
-data at runtime.
+This is the default option.
 
-### Build with full ICU support (all locales supported by ICU)
+#### Unix/macOS
 
-With the `--download=all`, this may download ICU if you don't have an
-ICU in `deps/icu`. (The embedded `small-icu` included in the default
-Node.js source does not include all locales.)
+```console
+$ ./configure --with-intl=full-icu
+```
+
+#### Windows
+
+```console
+> .\vcbuild full-icu
+```
+
+### Trimmed: `small-icu` (English only) support
+
+ In this configuration, only English data is included, but
+the full `Intl` (ECMA-402) APIs.  It does not need to download
+any dependencies to function. You can add full data at runtime.
 
 #### Unix/macOS
 
 ```console
-$ ./configure --with-intl=full-icu --download=all
+$ ./configure --with-intl=small-icu
 ```
 
 #### Windows
 
 ```console
-> .\vcbuild full-icu download-all
+> .\vcbuild small-icu
 ```
 
 ### Building without Intl support