add support for make flags to the build info script (#4672)

we can capture any flags provided to "make" via the $(MAKEFLAGS)
variable and pass them into the build info generator. This allows us to
store the command line overrides in a job_info

Author: zingale

Tools/C_scripts/AMReX_buildInfo.H

@@ -21,6 +21,7 @@ const char* buildInfoGetCXXFlags();
 const char* buildInfoGetFFlags();
 const char* buildInfoGetLinkFlags();
 const char* buildInfoGetLibraries();
+const char* buildInfoGetMakeFlags();
 const char* buildInfoGetAux(int i);
 int buildInfoGetNumModules();
 const char* buildInfoGetModuleName(int i);

Tools/C_scripts/makebuildinfo_C.py

@@ -96,6 +96,12 @@
   return libraries;
 }
 
+const char* buildInfoGetMakeFlags() {
+
+  static const char make_flags[] = "@@make_flags@@";
+  return make_flags;
+}
+
 const char* buildInfoGetAux(int i) {
 
   //static const char AUX1[] = "${AUX[1]}";
@@ -238,6 +244,10 @@ def get_git_hash(d, git_style):
 
     parser.add_argument("--libraries", help="libraries linked", type=str, default="")
 
+    parser.add_argument("--make_flags",
+                        help="the options provided to the make command",
+                        type=str, default="")
+
     parser.add_argument("--AUX",
                         help="auxiliary information (EOS, network path) (deprecated)",
                         type=str, default="")