utils: build Foundation macros for distribution

This adds a build of the Foundation macros for distribution in the
toolchain.

Author: compnerd

utils/build.ps1

@@ -292,7 +292,8 @@ function Get-TargetProjectBinaryCache($Arch, [TargetComponent]$Project) {
 
 enum HostComponent {
   Compilers = 5
-  System = 10
+  FoundationMacros = 10
+  System
   ToolsSupportCore
   LLBuild
   Yams
@@ -323,6 +324,7 @@ function Get-HostProjectCMakeModules([HostComponent]$Project) {
 enum BuildComponent {
   BuildTools
   Compilers
+  FoundationMacros
 }
 
 function Get-BuildProjectBinaryCache([BuildComponent]$Project) {
@@ -1455,10 +1457,58 @@ function Build-Foundation([Platform]$Platform, $Arch, [switch]$Test = $false) {
         _SwiftFoundation_SourceDIR = "$SourceCache\swift-foundation";
         _SwiftFoundationICU_SourceDIR = "$SourceCache\swift-foundation-icu";
         _SwiftCollections_SourceDIR = "$SourceCache\swift-collections"
+        SwiftFoundation_MACRO = "$(Get-BuildProjectBinaryCache FoundationMacros)\bin"
       } + $TestingDefines)
   }
 }
 
+function Build-FoundationMacros() {
+  [CmdletBinding(PositionalBinding = $false)]
+  param
+  (
+    [Parameter(Position = 0, Mandatory = $true)]
+    [Platform]$Platform,
+    [Parameter(Position = 1, Mandatory = $true)]
+    [hashtable]$Arch,
+    [switch] $Build = $false
+  )
+
+  $FoundationMacrosBinaryCache = if ($Build) {
+    Get-BuildProjectBinaryCache FoundationMacros
+  } else {
+    Get-HostProjectBinaryCache FoundationMacros
+  }
+
+  $SwiftSDK = $null
+  if ($Build) {
+    $SwiftSDK = $HostArch.SDKInstallRoot
+  }
+
+  $Targets = if ($Build) {
+    @("default")
+  } else {
+    @("default", "install")
+  }
+
+  $InstallDir = $null
+  if (-not $Build) {
+    $InstallDir = "$($Arch.ToolchainInstallRoot)\usr"
+  }
+
+  Build-CMakeProject `
+    -Src $SourceCache\swift-foundation\Sources\FoundationMacros `
+    -Bin $FoundationMacrosBinaryCache `
+    -InstallTo:$InstallDir `
+    -Arch $Arch `
+    -Platform $Platform `
+    -UseBuiltCompilers Swift `
+    -SwiftSDK:$SwiftSDK `
+    -BuildTargets $Targets `
+    -Defines @{
+      SwiftSyntax_DIR = (Get-HostProjectCMakeModules Compilers);
+    }
+}
+
 function Build-XCTest([Platform]$Platform, $Arch, [switch]$Test = $false) {
   $DispatchBinaryCache = Get-TargetProjectBinaryCache $Arch Dispatch
   $FoundationBinaryCache = Get-TargetProjectBinaryCache $Arch Foundation
@@ -2057,11 +2107,17 @@ if (-not $SkipBuild) {
     # Build platform: SDK, Redist and XCTest
     Invoke-BuildStep Build-Runtime Windows $Arch
     Invoke-BuildStep Build-Dispatch Windows $Arch
+    Invoke-BuildStep Build-FoundationMacros -Build Windows $BuildArch
     Invoke-BuildStep Build-Foundation Windows $Arch
     Invoke-BuildStep Build-XCTest Windows $Arch
   }
 }
 
+if (-not $SkipBuild) {
+  # Build Macros for distribution
+  Invoke-BuildStep Build-FoundationMacros Windows $HostArch
+}
+
 if (-not $ToBatch) {
   if ($HostArch -in $WindowsSDKArchs) {
     $RuntimeInstallRoot = [IO.Path]::Combine((Get-InstallDir $HostArch), "Runtimes", $ProductVersion)