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Completed another review pass, making more improvements
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@@ -38,6 +38,12 @@ If the user is working inside **Visual Studio** (not VS Code), prefer using the
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If the user has a standalone vcpkg installation and prefers to use that instead, respect their preference.
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### Shell Environment Variable Syntax
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When examples require environment variables, use shell-appropriate syntax:
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- PowerShell: `$env:VARIABLE = "value"`
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- Bash/Zsh: `export VARIABLE=value`
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---
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## Project Setup
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@@ -128,18 +134,10 @@ vcpkg install zlib:arm64-windows
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In manifest mode, set the triplet via CMake:
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```console
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cmake -B build -DVCPKG_TARGET_TRIPLET=x64-linux -DCMAKE_TOOLCHAIN_FILE=[vcpkg root]/scripts/buildsystems/vcpkg.cmake
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cmake -B build -DVCPKG_TARGET_TRIPLET=x64-linux -DCMAKE_TOOLCHAIN_FILE=<vcpkg-root>/scripts/buildsystems/vcpkg.cmake
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```
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Or set the environment variable:
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```powershell
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$env:VCPKG_DEFAULT_TRIPLET = "x64-linux"
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```
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```bash
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export VCPKG_DEFAULT_TRIPLET=x64-linux
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```
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Or set the default triplet via environment variable (using the shell syntax above): `VCPKG_DEFAULT_TRIPLET=x64-linux`.
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### Bulk-Adding Multiple Dependencies
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@@ -162,13 +160,9 @@ Then run `vcpkg install` (manifest mode) or the above command to install all at
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Place test-only dependencies under an opt-in feature. The `"host"` field is reserved for build tools that must run on the host architecture:
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```json
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{
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"dependencies": [
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"fmt",
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"spdlog"
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],
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"dependencies": ["fmt"],
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"features": {
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"tests": {
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"description": "Build tests",
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"dependencies": ["gtest"]
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}
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}
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@@ -183,40 +177,30 @@ Activate with: `vcpkg install --x-feature=tests` or in CMake: `-DVCPKG_MANIFEST_
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### Setting Versions for Individual Dependencies
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In `vcpkg.json`, prefer using `"version>="` as a minimum version constraint over overrides. Example:
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Prefer `"version>="` for minimum-version constraints:
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```json
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{
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"dependencies": [
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{
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"name": "fmt",
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"version>=": "10.2.0"
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}
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],
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"dependencies": [{ "name": "fmt", "version>=": "10.2.0" }],
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"builtin-baseline": "<commit-sha>"
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}
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```
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If the user insists on hard-coding a version and is okay dealing with ABI compatibility issues manually, use overrides instead:
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Use `overrides` only when a hard pin is required:
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```json
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{
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"dependencies": ["fmt"],
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"overrides": [
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{
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"name": "fmt",
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"version": "10.2.0"
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}
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],
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"overrides": [{ "name": "fmt", "version": "10.2.0" }],
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"builtin-baseline": "<commit-sha>"
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}
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```
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The `builtin-baseline` is **very important** when using versioning. Suggest baselines at minimum as a way to set all library versions to a known-good state, and use overrides only when necessary.
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Always include `builtin-baseline` when using versioning.
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**Key points:**
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- `overrides` takes precedence over all version constraints, including transitive ones
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- You **must** have a `builtin-baseline` set for overrides to work
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- The version must exist in the selected vcpkg registry's version database; an override may select a version older than the baseline version
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- Use `vcpkg x-history zlib` to see available versions
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- `overrides` take precedence over all version constraints, including transitive ones.
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- `builtin-baseline` is required for overrides.
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- Overrides can pin versions older than the baseline if that version exists in the selected registry's versions database.
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- Use `vcpkg x-history <port>` to inspect available versions.
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---
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@@ -229,12 +213,8 @@ vcpkg install <packages>:arm64-linux
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```
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Or set the triplet in CMake:
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```powershell
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cmake -B build -DVCPKG_TARGET_TRIPLET=arm64-linux -DCMAKE_TOOLCHAIN_FILE=$env:VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake
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```
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```bash
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cmake -B build -DVCPKG_TARGET_TRIPLET=arm64-linux -DCMAKE_TOOLCHAIN_FILE=$VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake
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```console
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cmake -B build -DVCPKG_TARGET_TRIPLET=arm64-linux -DCMAKE_TOOLCHAIN_FILE=<vcpkg-root>/scripts/buildsystems/vcpkg.cmake
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```
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You may need a cross-compilation toolchain installed (e.g., `aarch64-linux-gnu-gcc`).
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@@ -246,39 +226,16 @@ vcpkg install <packages>:arm64-windows
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### Building for Android (NDK)
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1. Set environment variables:
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```powershell
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$env:ANDROID_NDK_HOME = "C:\path\to\ndk"
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$env:VCPKG_DEFAULT_TRIPLET = "arm64-android"
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```
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```bash
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export ANDROID_NDK_HOME=/path/to/ndk
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export VCPKG_DEFAULT_TRIPLET=arm64-android
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```
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2. Install packages:
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1. Install packages:
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```console
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vcpkg install <packages>:arm64-android
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```
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Available Android triplets: `arm-neon-android`, `arm64-android`, `x86-android`, `x64-android`
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3. In CMake:
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```powershell
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cmake -B build `
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-DCMAKE_TOOLCHAIN_FILE=$env:VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake `
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-DVCPKG_TARGET_TRIPLET=arm64-android `
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-DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=$env:ANDROID_NDK_HOME/build/cmake/android.toolchain.cmake `
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-DANDROID_ABI=arm64-v8a `
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-DANDROID_PLATFORM=android-24
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2. In CMake:
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```console
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cmake -B build -DCMAKE_TOOLCHAIN_FILE=<vcpkg-root>/scripts/buildsystems/vcpkg.cmake -DVCPKG_TARGET_TRIPLET=arm64-android -DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=<android-ndk>/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=android-24
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```
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```bash
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cmake -B build \
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-DCMAKE_TOOLCHAIN_FILE=$VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake \
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-DVCPKG_TARGET_TRIPLET=arm64-android \
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-DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=$ANDROID_NDK_HOME/build/cmake/android.toolchain.cmake \
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-DANDROID_ABI=arm64-v8a \
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-DANDROID_PLATFORM=android-24
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```
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For expanded CI and shell-specific examples, see `references/ci.md`.
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