Fixes to get cmake working on windows. (#161)

* Fixes to get cmake working on windows.

* Update bld.bat

Author: diptorupd

backends/CMakeLists.txt

@@ -13,7 +13,7 @@ function (check_for_dpcpp)
         set (dpcpp_cmd "${DPCPP_ROOT}/bin/dpcpp")
         set (dpcpp_arg "--version")
     elseif(UNIX)
-        set (dpcpp_cmd "dpcpp")
+        set (dpcpp_cmd "${DPCPP_ROOT}/bin/dpcpp")
         set (dpcpp_arg "--version")
     else()
         message(FATAL_ERROR "Unsupported system.")

conda-recipe/bld.bat

@@ -1,5 +1,8 @@
-call "%ONEAPI_ROOT%compiler\latest\env\vars.bat"
-IF ERRORLEVEL 1 exit /b 1
+call "%ONEAPI_ROOT%\compiler\latest\env\vars.bat"
+IF %ERRORLEVEL% NEQ 0 (
+	echo "oneAPI compiler activation failed"
+	exit /b 1
+)
 REM conda uses %ERRORLEVEL% but FPGA scripts can set it. So it should be reseted.
 set ERRORLEVEL=
 
@@ -10,7 +13,7 @@ rmdir /S /Q build_cmake
 mkdir build_cmake
 cd build_cmake
 
-set "DPCPP_ROOT=%ONEAPI_ROOT%compiler\latest\windows"
+set "DPCPP_ROOT=%ONEAPI_ROOT%\compiler\latest\windows"
 set "INSTALL_PREFIX=%cd%\..\install"
 
 rmdir /S /Q "%INSTALL_PREFIX%"
@@ -20,7 +23,7 @@ cmake -G Ninja ^
     "-DCMAKE_INSTALL_PREFIX=%INSTALL_PREFIX%" ^
     "-DCMAKE_PREFIX_PATH=%LIBRARY_PREFIX%" ^
     "-DDPCPP_ROOT=%DPCPP_ROOT%" ^
-    "%SRC_DIR%/backends"
+    "%SRC_DIR%\backends"
 IF %ERRORLEVEL% NEQ 0 exit /b 1
 
 ninja -n

conda-recipe/run_test.bat

@@ -1,12 +1,15 @@
-call "%ONEAPI_ROOT%/compiler/latest/env/vars.bat"
-IF ERRORLEVEL 1 exit 1
+call "%ONEAPI_ROOT%\compiler\latest\env\vars.bat"
+IF %ERRORLEVEL% NEQ 0 (
+	echo "oneAPI compiler activation failed%"
+	exit /b 1
+)
 REM conda uses %ERRORLEVEL% but FPGA scripts can set it. So it should be reseted.
 set ERRORLEVEL=
 
 @echo on
 
 "%PYTHON%" -c "import dpctl"
-IF %ERRORLEVEL% NEQ 0 exit 1
+IF %ERRORLEVEL% NEQ 0 exit /b 1
 
 "%PYTHON%" -m unittest -v dpctl.tests
-IF %ERRORLEVEL% NEQ 0 exit 1
+IF %ERRORLEVEL% NEQ 0 exit /b 1