Fix hip-config.cmake for CMAKE_CXX_COMPILER=g++ (#2035)

* Fix hip-config.cmake for CMAKE_CXX_COMPILER=g++

Change-Id: I84ae83a5d223853706dd36834b7962ffe9573c1f

* Fix HIP_CXX_COMPILER

Change-Id: I4e2523b560113420af1ab877a0bc48ca2e9e957a

* Fix hip-config.cmake

Change-Id: Ida4ef8f40fed83d5f659a9a9835b1f521cb6a374

* Add inlineall option to hip::device in hip-config.cmake

Change-Id: Ib51f82d0b9e38d2137df65c940592413e22ba07a

[ROCm/hip commit: 75a5088446]

projects/hip/hip-config.cmake.in

@@ -51,8 +51,11 @@ set_and_check(hip_HIPCC_EXECUTABLE "${hip_BIN_INSTALL_DIR}/hipcc")
 set_and_check(hip_HIPCONFIG_EXECUTABLE "${hip_BIN_INSTALL_DIR}/hipconfig")
 
 if(HIP_COMPILER STREQUAL "clang")
-  if(CMAKE_CXX_COMPILER MATCHES ".*hipcc")
-    execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version
+  if(NOT HIP_CXX_COMPILER)
+    set(HIP_CXX_COMPILER ${CMAKE_CXX_COMPILER})
+  endif()
+  if(HIP_CXX_COMPILER MATCHES ".*hipcc")
+    execute_process(COMMAND ${HIP_CXX_COMPILER} --version
                     OUTPUT_STRIP_TRAILING_WHITESPACE
                     OUTPUT_VARIABLE HIP_CLANG_CXX_COMPILER_VERSION_OUTPUT)
     if(HIP_CLANG_CXX_COMPILER_VERSION_OUTPUT MATCHES "InstalledDir:[\t\r\n][\t\r\n]*([^\t\r\n])")
@@ -60,9 +63,11 @@ if(HIP_COMPILER STREQUAL "clang")
     else()
       set(HIP_CLANG_ROOT /opt/rocm/llvm)
     endif()
-  else()
-    get_filename_component(HIP_CLANG_ROOT "${CMAKE_CXX_COMPILER}" PATH)
+  elseif (HIP_CXX_COMPILER MATCHES ".*clang\\+\\+")
+    get_filename_component(HIP_CLANG_ROOT "${HIP_CXX_COMPILER}" PATH)
     get_filename_component(HIP_CLANG_ROOT "${HIP_CLANG_ROOT}" PATH)
+  else()
+    set(HIP_CLANG_ROOT /opt/rocm/llvm)
   endif()
   file(GLOB HIP_CLANG_INCLUDE_SEARCH_PATHS ${HIP_CLANG_ROOT}/lib/clang/*/include)
   find_path(HIP_CLANG_INCLUDE_PATH stddef.h
@@ -137,6 +142,12 @@ if(HIP_COMPILER STREQUAL "clang")
     INTERFACE_COMPILE_OPTIONS -x hip --hip-device-lib-path=${AMD_DEVICE_LIBS_PREFIX}/lib
   )
 
+  if (HIP_CXX_COMPILER MATCHES ".*clang\\+\\+")
+    set_property(TARGET hip::device APPEND PROPERTY
+      INTERFACE_COMPILE_OPTIONS -mllvm -amdgpu-early-inline-all=true -mllvm -amdgpu-function-calls=false
+    )
+  endif()
+
   set_property(TARGET hip::device APPEND PROPERTY
     INTERFACE_LINK_LIBRARIES --hip-device-lib-path=${AMD_DEVICE_LIBS_PREFIX}/lib --hip-link
   )