Always define static_assert(...) to do nothing

Summary:public
In order to make infer more resiliant to compilation failure,
make static_assert to do nothing.

As a bonus, set _FORTIFY_SOURCE inside same file instead of command line

Reviewed By: jvillard

Differential Revision: D3133446

fb-gh-sync-id: 590f4ad
fbshipit-source-id: 590f4ad

infer/lib/clang_wrappers/clang_wrapper

@@ -39,11 +39,7 @@ done
 # compiler can't elevate them to error level.
 COMMAND+=("-Wno-everything")
 
-
-# set _FORTIFY_SOURCE to 0 to prevent it from changing some function prototypes
-# https://securityblog.redhat.com/2014/03/26/fortify-and-you/
-# We always do it when building models so we should do same thing
-# when building any source code
-COMMAND+=("-D_FORTIFY_SOURCE=0")
+COMMAND+=("-include")
+COMMAND+=(${SCRIPT_DIR}/"global_defines.h")
 
 "${COMMAND[@]}"

infer/lib/clang_wrappers/global_defines.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2016 - present Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+// set _FORTIFY_SOURCE to 0 to prevent it from changing some function prototypes
+// https://securityblog.redhat.com/2014/03/26/fortify-and-you/
+// We always do it when building models so we should do same thing
+// when building any source code
+#define _FORTIFY_SOURCE 0
+
+// Make it harder for compilation to fail. When in the future, infer
+// wants to use this information, it can call some builtin instead of
+// the default static_assert
+#define static_assert(...)

infer/models/cpp/include/infer_model/common.h

@@ -13,8 +13,6 @@
 #include <cstdlib>
 #include <cstdio>
 
-#define static_assert(...)
-
 namespace infer_model {
 // code compiled with infer headers is not supposed to be executed
 struct AbortWhenRun {