win: ensure ollama paths come first (#10549)

For all search path env vars make sure our dirs are first
to avoid potentially finding other incompatible libraries
on the users system.

Also fixes a minor build script glitch for windows rocm

llm/server.go

@@ -325,7 +325,9 @@ func NewLlamaServer(gpus discover.GpuInfoList, modelPath string, f *ggml.GGML, a
 			pathEnv = "LD_LIBRARY_PATH"
 		}
 
-		var libraryPaths []string
+		// Note: we always put our dependency paths first
+		// since these are the exact version we compiled/linked against
+		libraryPaths := []string{discover.LibOllamaPath}
 		if libraryPath, ok := os.LookupEnv(pathEnv); ok {
 			libraryPaths = append(libraryPaths, filepath.SplitList(libraryPath)...)
 		}
@@ -335,13 +337,11 @@ func NewLlamaServer(gpus discover.GpuInfoList, modelPath string, f *ggml.GGML, a
 			c := compatible[0]
 			if libpath, ok := libs[c]; ok {
 				slog.Debug("adding gpu library", "path", libpath)
-				libraryPaths = append(libraryPaths, libpath)
+				libraryPaths = append([]string{libpath}, libraryPaths...)
 				ggmlPaths = append(ggmlPaths, libpath)
 			}
 		}
 
-		// Note: we always put the dependency path first
-		// since this was the exact version we compiled/linked against
 		if gpus[0].DependencyPath != nil {
 			slog.Debug("adding gpu dependency paths", "paths", gpus[0].DependencyPath)
 			// assume gpus from the same library have the same dependency path

scripts/build_windows.ps1

@@ -121,7 +121,7 @@ function buildOllama() {
         if ($env:HIP_PATH) {
             write-host "Building ROCm backend libraries"
             if (-Not (get-command -ErrorAction silent ninja)) {
-                $NINJA_DIR=(gci -path (Get-CimInstance MSFT_VSInstance -Namespace root/cimv2/vs)[0].InstallLocation -r -fi ninja.exe) | split-path -parent
+                $NINJA_DIR=(gci -path (Get-CimInstance MSFT_VSInstance -Namespace root/cimv2/vs)[0].InstallLocation -r -fi ninja.exe).Directory.FullName
                 $env:PATH="$NINJA_DIR;$env:PATH"
             }
             $env:HIPCXX="${env:HIP_PATH}\bin\clang++.exe"