Use clang++ from HIP SDK on Windows as a C++ compiler

src/CMakeLists.txt

@@ -346,6 +346,8 @@ if(BUILD_DEV)
     target_compile_definitions(migraphx PUBLIC -DBUILD_DEV)
 endif()
 
+target_compile_definitions(migraphx PUBLIC MIGRAPHX_CXX_COMPILER="${CMAKE_CXX_COMPILER}")
+
 rocm_export_targets(
   TARGETS migraphx::migraphx_c
   NAMESPACE migraphx::

src/compile_src.cpp

@@ -61,7 +61,7 @@
 
     std::vector<std::string> args;
     if(not launcher.empty())
-        args.push_back(compiler);
+        args.push_back(compiler.string());
     args.insert(args.end(), params.begin(), params.end());
     td.execute(launcher.empty() ? compiler : launcher, args);
 

src/include/migraphx/compile_src.hpp

@@ -53,10 +53,10 @@ struct src_file
 
 struct MIGRAPHX_EXPORT src_compiler
 {
-    std::string compiler                      = "c++";
+    fs::path compiler                         = MIGRAPHX_CXX_COMPILER;
     std::vector<std::string> flags            = {};
     fs::path output                           = {};
-    std::string launcher                      = "";
+    fs::path launcher                         = {};
     std::string out_ext                       = ".o";
     std::function<fs::path(fs::path)> process = nullptr;
     std::vector<char> compile(const std::vector<src_file>& srcs) const;

src/include/migraphx/tmp_dir.hpp

@@ -40,6 +40,10 @@ struct MIGRAPHX_EXPORT tmp_dir
     tmp_dir(tmp_dir&&) = default;
 
     void execute(std::string_view cmd, const std::vector<std::string>& args = {}) const;
+    void execute(const fs::path& cmd, const std::vector<std::string>& args = {}) const
+    {
+        execute(std::string_view{cmd.string()}, args);
+    }
 
     tmp_dir(tmp_dir const&) = delete;
     tmp_dir& operator=(tmp_dir const&) = delete;

src/targets/gpu/CMakeLists.txt

@@ -252,6 +252,8 @@ else()
     endif()
 endif()
 
+target_compile_definitions(migraphx_gpu PUBLIC MIGRAPHX_CXX_COMPILER="${CMAKE_CXX_COMPILER}")
+
 # Check miopen find mode api
 
 include(CheckLibraryExists)