Set /opt/hcc correctly if HCC_HOME not defined

[ROCm/hip commit: a24361df6f]

projects/hip/CMakeLists.txt

@@ -1,12 +1,12 @@
 cmake_minimum_required(VERSION 2.6)
 project(hip_hcc)
 
+# preserve HCC_HOME env in the generated
 set (HCC_HOME $ENV{HCC_HOME})
 if (NOT DEFINED HCC_HOME)
-    set(HCC_HOME "/opt/hcc")
+    set (HCC_HOME /opt/hcc)
 endif()
 
-
 MESSAGE ("HCC_HOME=" ${HCC_HOME})
 
 set(HSA_PATH "/opt/hsa")
@@ -18,10 +18,10 @@ endif ()
 include_directories(${PROJECT_SOURCE_DIR}/include)
 
 set(CMAKE_CXX_COMPILER "${HCC_HOME}/bin/hcc")
-set(CMAKE_C_COMPILER "${HCC_HOME}/bin/hcc")
+set(CMAKE_C_COMPILER   "${HCC_HOME}/bin/hcc")
 
-set(CMAKE_C_FLAGS " -hc -I${HCC_HOME}/include -I${HSA_PATH}/include -I${HIP_PATH}/include -stdlib=libc++ ")
 set(CMAKE_CXX_FLAGS " -hc -I${HCC_HOME}/include -I${HSA_PATH}/include -I${HIP_PATH}/include -stdlib=libc++ ")
+set(CMAKE_C_FLAGS   " -hc -I${HCC_HOME}/include -I${HSA_PATH}/include -I${HIP_PATH}/include -stdlib=libc++ ")
 
 set(SOURCE_FILES src/hip_hcc.cpp src/staging_buffer.cpp)