Improved resource path detection on systems without clang/clang++ installed

CMakeLists.txt

@@ -100,9 +100,7 @@ else()
   find_package(LibClang REQUIRED)
 endif()
 
-if(APPLE)
 add_definitions(-DLIBCLANG_LIBRARY_DIR="${LIBCLANG_LIBRARY_DIR}")
-endif()
 
 set(BUILD_TESTING_SAVED ${BUILD_TESTING})
 set(BUILD_TESTING OFF CACHE BOOL "Disable sub-project tests" FORCE)

src/compile_commands.cpp

@@ -107,6 +107,7 @@ std::vector<std::string> CompileCommands::get_arguments(const boost::filesystem:
   }
 #else
   static auto resource_path = []() -> std::string {
+    if(!filesystem::find_executable("clang++").empty()) {
       std::stringstream stdin_stream, stdout_stream;
       auto exit_status = Terminal::get().process(stdin_stream, stdout_stream, "clang++ -print-resource-dir");
       if(exit_status != 0)
@@ -115,6 +116,13 @@ std::vector<std::string> CompileCommands::get_arguments(const boost::filesystem:
       if(!path.empty())
         path.pop_back();
       return path;
+    }
+    else {
+      boost::system::error_code ec;
+      for(boost::filesystem::directory_iterator it(boost::filesystem::path(LIBCLANG_LIBRARY_DIR) / "clang", ec), end; it != end; ++it)
+        return it->path().string();
+    }
+    return {};
   }();
   if(!resource_path.empty()) {
     arguments.emplace_back("-resource-dir");