[client/common] windows: fix native clang-cl build

doc/build_client_windows.rst

@@ -4,8 +4,8 @@ Build the Windows client
 ########################
 
 The Windows client uses ``clang-cl`` and the MSVC ABI. ANGLE continues to
-provide EGL and OpenGL ES, while MsQuic and its bundled OpenSSL are linked
-statically.
+provide EGL and OpenGL ES, while MsQuic and the vcpkg-provided OpenSSL are
+linked statically.
 
 Requirements
 ------------
@@ -14,7 +14,7 @@ Install the following tools:
 
 - Visual Studio 2022 Build Tools with the Desktop development with C++
   workload, Clang tools for Windows, and a Windows SDK
-- CMake 3.21 or newer
+- CMake 3.24 or newer
 - Ninja, with ``ninja.exe`` available on ``PATH``
 - Git
 - vcpkg
@@ -30,13 +30,23 @@ works before configuring the client.
 Building
 --------
 
-Open an x64 Native Tools command prompt or Developer PowerShell, then run:
+Open an x64 Native Tools command prompt. Alternatively, initialize a regular
+PowerShell session for an x64 host and target first (replace ``Community``
+with the installed Visual Studio edition when necessary):
+
+.. code:: powershell
+
+   $vsTools = 'C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\Tools'
+   & "$vsTools\Launch-VsDevShell.ps1" `
+     -Arch amd64 -HostArch amd64 -SkipAutomaticLocation
+
+Then run:
 
 .. code:: powershell
 
    git submodule update --init --recursive
    cd client
-   cmake --preset windows-clangcl
+   cmake --fresh --preset windows-clangcl
    cmake --build --preset windows-clangcl-release
 
 The executable is written beneath ``client/build/windows-clangcl``. The