Eliminate CMake check when CMake isn't going to be used

build-test.cmd

@@ -164,8 +164,8 @@ if not exist "%__LogsDir%"                      md "%__LogsDir%"
 
 echo %__MsgPrefix%Checking prerequisites
 
-REM Eval the output from probe-win1.ps1
-for /f "delims=" %%a in ('powershell -NoProfile -ExecutionPolicy ByPass "& ""%__SourceDir%\pal\tools\probe-win.ps1"""') do %%a
+REM Eval the output from set-cmake-path.ps1
+for /f "delims=" %%a in ('powershell -NoProfile -ExecutionPolicy ByPass "& ""%__SourceDir%\pal\tools\set-cmake-path.ps1"""') do %%a
 
 REM =========================================================================================
 REM ===

build.cmd

@@ -320,8 +320,13 @@ REM Set the remaining variables based upon the determined build configuration
 
 echo %__MsgPrefix%Checking prerequisites
 
-REM Eval the output from probe-win1.ps1
-for /f "delims=" %%a in ('powershell -NoProfile -ExecutionPolicy ByPass "& ""%__SourceDir%\pal\tools\probe-win.ps1"""') do %%a
+set __CMakeNeeded=1
+if %__BuildNative%==0 if %__BuildNativeCoreLib%==0 if %__BuildTests%==0 set __CMakeNeeded=0
+if %__CMakeNeeded%==1 (
+    REM Eval the output from set-cmake-path.ps1
+    for /f "delims=" %%a in ('powershell -NoProfile -ExecutionPolicy ByPass "& ""%__SourceDir%\pal\tools\set-cmake-path.ps1"""') do %%a
+    REM echo Using CMake from %CMakePath%
+)
 
 REM NumberOfCores is an WMI property providing number of physical cores on machine
 REM processor(s). It is used to set optimal level of CL parallelism during native build step

src/pal/tools/gen-buildsys-win.bat

@@ -36,8 +36,8 @@ goto loop
 
 if defined CMakePath goto DoGen
 
-:: Eval the output from probe-win1.ps1
-for /f "delims=" %%a in ('powershell -NoProfile -ExecutionPolicy ByPass "& "%basePath%\probe-win.ps1""') do %%a
+:: Eval the output from set-cmake-path.ps1
+for /f "delims=" %%a in ('powershell -NoProfile -ExecutionPolicy ByPass "& "%basePath%\set-cmake-path.ps1""') do %%a
 
 :DoGen
 "%CMakePath%" "-DCMAKE_USER_MAKE_RULES_OVERRIDE=%basePath%\windows-compiler-override.txt" "-DCMAKE_INSTALL_PREFIX:PATH=$ENV{__CMakeBinDir}" "-DCLR_CMAKE_HOST_ARCH=%__Arch%" %__ExtraCmakeParams% -G "%__CmakeGenerator%" %__SourceDir%