[clang] only pass `--Xclang` args to driver commands

Summary:
Not all clang commands are happy with all arguments, but the driver is usually
the place we want to add arguments to.

Reviewed By: martinoluca

Differential Revision: D9421403

fbshipit-source-id: fa6d39a9b

infer/src/clang/ClangCommand.ml

@@ -190,7 +190,9 @@ let mk ~is_driver quoting_style ~prog ~args =
   let sanitized_args =
     filter_and_replace_unsupported_args ~blacklisted_flags:clang_blacklisted_flags
       ~blacklisted_flags_with_arg args
-    @ List.rev Config.clang_extra_flags
+  in
+  let sanitized_args =
+    if is_driver then sanitized_args @ List.rev Config.clang_extra_flags else sanitized_args
   in
   {exec= prog; orig_argv= sanitized_args; argv= sanitized_args; quoting_style; is_driver}
 

infer/tests/build_systems/assembly/Makefile

@@ -7,7 +7,7 @@ TESTS_DIR = ../..
 
 ANALYZER = checkers
 CLANG_OPTIONS = -c
-INFER_OPTIONS = --report-custom-error --developer-mode --project-root ../codetoanalyze
+INFER_OPTIONS = --report-custom-error --developer-mode --project-root ../codetoanalyze --Xclang -U --Xclang __SSE2__
 INFERPRINT_OPTIONS = --issues-tests
 
 SOURCES = \