[Infer][Buck] Invoke buck with *//cxx.pch_enabled=false to disable the use of precompiled headers

Reviewed By: mzlee

Differential Revision: D4015308

fbshipit-source-id: 6c2a6fe

infer/lib/python/inferlib/capture/buck.py

@@ -128,6 +128,8 @@ class BuckAnalyzer:
             '*//infer.clang_compiler={clang}'.format(clang=clang_path),
             '--config',
             '*//infer.clang_plugin={plugin}'.format(plugin=plugin_path),
+            '--config',
+            '*//cxx.pch_enabled=false',
         ] + self.args.Xbuck
 
         if self.args.xcode_developer_dir is not None:

infer/src/integration/BuckCompilationDatabase.ml

@@ -163,7 +163,8 @@ let get_compilation_database changed_files =
   | buck :: build :: args ->
       (check_args_for_targets args;
        let args_with_flavor = add_flavor_to_targets args in
-       let buck_build = Array.of_list (buck :: build :: args_with_flavor) in
+       let buck_build = Array.of_list
+           (buck :: build :: "--config" :: "*//cxx.pch_enabled=false" :: args_with_flavor) in
        Process.create_process_and_wait buck_build;
        let buck_targets_list = buck :: "targets" :: "--show-output" :: args_with_flavor in
        let buck_targets = String.concat " " buck_targets_list in