-> DARCH, update nv opencl version link

Author: wenju-he

libclc/CMakeLists.txt

@@ -390,7 +390,7 @@ foreach( t ${LIBCLC_TARGETS_TO_BUILD} )
     # 1.2 is Clang's default OpenCL C language standard to compile for.
     set( opencl_lang_std "CL1.2" )
 
-    if ( ${DARCH} STREQUAL spirv )
+    if ( DARCH STREQUAL spirv )
       set( opencl_lang_std "CL3.0" )
       set( build_flags -O0 -finline-hint-functions -DCLC_SPIRV )
       set( opt_flags )
@@ -399,7 +399,7 @@ foreach( t ${LIBCLC_TARGETS_TO_BUILD} )
       if( ARCH STREQUAL spirv64 )
         set( MACRO_ARCH SPIRV64 )
       endif()
-    elseif( ${DARCH} STREQUAL clspv )
+    elseif( DARCH STREQUAL clspv )
       # Refer to https://github.com/google/clspv for OpenCL version.
       set( opencl_lang_std "CL3.0" )
       set( build_flags "-Wno-unknown-assumption" -DCLC_CLSPV )
@@ -408,13 +408,13 @@ foreach( t ${LIBCLC_TARGETS_TO_BUILD} )
       if( ARCH STREQUAL clspv64 )
         set( MACRO_ARCH CLSPV64 )
       endif()
-    elseif( ${DARCH} STREQUAL nvptx )
-      # Refer to https://www.khronos.org/opencl/ for OpenCL version in NV implementation.
+    elseif( DARCH STREQUAL nvptx )
+      # Refer to https://developer.nvidia.com/opencl for OpenCL version.
       set( opencl_lang_std "CL3.0" )
       set( build_flags )
       set( opt_flags -O3 )
       set( MACRO_ARCH ${ARCH} )
-    elseif( ${DARCH} STREQUAL amdgcn OR ${DARCH} STREQUAL amdgcn-amdhsa )
+    elseif( DARCH STREQUAL amdgcn OR DARCH STREQUAL amdgcn-amdhsa )
       # Refer to https://github.com/ROCm/clr/tree/develop/opencl for OpenCL version.
       set( opencl_lang_std "CL2.0" )
       set( build_flags )