fixed simple build on Windows

Author: CommanderPho

README.md

@@ -80,34 +80,6 @@ export LD_LIBRARY_PATH=~/Qt/6.8.3/gcc_64/lib:$LD_LIBRARY_PATH
 
 Alternatively, build CLI-only with `-DLSLTEMPLATE_BUILD_GUI=OFF` to avoid the Qt dependency.
 
-### Single-command build and run
-
-From the repo root, one command can configure, build, install, and start the server. Dependencies (liblsl, hidapi, tiny-AES-c) are fetched automatically. Requires CMake 3.25+ and PowerShell Core (`pwsh`) for the run script.
-
-**Windows (PowerShell):**
-
-```powershell
-# Build self-contained install only
-cmake --workflow --preset emotiv
-cmake --install build --config Release
-
-# Build and start collecting data (single command)
-pwsh ./run.ps1
-```
-
-**Linux / macOS:**
-
-```bash
-# Build self-contained install only
-cmake --workflow --preset emotiv
-cmake --install build --config Release
-
-# Build and start collecting data (single command)
-pwsh ./run.ps1
-```
-
-The preset builds only `emotiv_lsl` (no Qt/CLI). The executable and bundled LSL library end up in `build/install/`.
-
 ### Quick Start
 
 ```bash
@@ -235,6 +207,30 @@ For automated signing and notarization, the workflow expects these secrets from
 1. Go to Organization Settings → Secrets and variables → Actions
 2. For each secret, click to edit and under "Repository access" select the repositories that need access
 
-## License
+### Single-command build and run
+
+From the repo root, one command can configure, build, install, and start the server. Dependencies (liblsl, hidapi, tiny-AES-c) are fetched automatically. Requires CMake 3.25+ and PowerShell Core (`pwsh`) for the run script.
+
+**Windows (PowerShell):**
+
+```powershell
+# Build self-contained install only
+cmake --workflow --preset emotiv
+cmake --install build --config Release
 
-MIT License - see LICENSE
+# Build and start collecting data (single command)
+pwsh ./run.ps1
+```
+
+**Linux / macOS:**
+
+```bash
+# Build self-contained install only
+cmake --workflow --preset emotiv
+cmake --install build --config Release
+
+# Build and start collecting data (single command)
+pwsh ./run.ps1
+```
+
+The preset builds only `emotiv_lsl` (no Qt/CLI). The executable and bundled LSL library end up in `build/install/`.

run.ps1

@@ -9,14 +9,34 @@
   the binary), then launches emotiv_lsl. All C++ dependencies (liblsl, hidapi,
   tiny-AES-c) are fetched automatically by CMake on first run.
 
+  If a stale CMakeCache.txt exists from a different generator, it is removed
+  automatically before configuring so the build stays consistent cross-platform.
+
 .EXAMPLE
   pwsh ./run.ps1
 #>
 
 Set-StrictMode -Version Latest
 $ErrorActionPreference = 'Stop'
 
-$root = $PSScriptRoot
+$root         = $PSScriptRoot
+$cacheFile    = Join-Path $root "build" "CMakeCache.txt"
+$wantedGen    = if ($IsWindows) { "Visual Studio 17 2022" } else { "Ninja" }
+
+# Tell CMake which generator to use (preset has none specified so this env var
+# is the authoritative source on all platforms).
+$env:CMAKE_GENERATOR = $wantedGen
+
+# Remove stale cache when the stored generator doesn't match the wanted one.
+# This happens after a previous build with a different generator.
+# Object files in build/ are also removed so CMake starts clean.
+if (Test-Path $cacheFile) {
+    $cachedGen = (Select-String -Path $cacheFile -Pattern '^CMAKE_GENERATOR:INTERNAL=(.+)').Matches.Groups[1].Value
+    if ($cachedGen -and $cachedGen -ne $wantedGen) {
+        Write-Host "==> Stale cache detected (was: $cachedGen, want: $wantedGen). Clearing build/ for clean configure." -ForegroundColor Yellow
+        Remove-Item -Recurse -Force (Join-Path $root "build")
+    }
+}
 
 Write-Host "==> cmake --workflow --preset emotiv" -ForegroundColor Cyan
 cmake --workflow --preset emotiv