Restore platform arguments

src/platform_posix.cc

@@ -259,6 +259,10 @@ bool IsSymLink(const std::string& path) {
   return lstat(path.c_str(), &buf) == 0 && S_ISLNK(buf.st_mode);
 }
 
+std::vector<const char*> GetPlatformClangArguments() {
+  return {};
+}
+
 void FreeUnusedMemory() {
 #if defined(__GLIBC__)
   malloc_trim(0);

src/platform_win.cc

@@ -129,6 +129,25 @@ bool IsSymLink(const std::string& path) {
   return false;
 }
 
+std::vector<const char*> GetPlatformClangArguments() {
+  //
+  // Found by executing
+  //
+  //   $ clang++ -E -x c++ - -v
+  //
+  // https://clang.llvm.org/docs/MSVCCompatibility.html
+  //
+  //
+  // These options are only needed if clang is targeting the msvc triple,
+  // which depends on how clang was build for windows. clang downloaded from
+  // releases.llvm.org defaults to msvc, so cquery does as well.
+  //
+  // https://github.com/cquery-project/cquery/issues/509 has more context.
+  //
+  return {"-fms-extensions", "-fms-compatibility",
+          "-fdelayed-template-parsing"};
+}
+
 void FreeUnusedMemory() {}
 
 bool RunObjectiveCIndexTests() {