Add duplicate detection to project compilation

hal/targets.json

@@ -20,7 +20,8 @@
         "fpu": "double",
         "public": true,
         "default_build": "standard",
-        "release": true
+        "release": true,
+        "supported_toolchains": ["ARM"]
     },
     "CM4_UARM": {
         "inherits": ["Target"],

tools/build_api.py

@@ -452,6 +452,8 @@ def build_project(src_paths, build_path, target, toolchain_name,
         # Link Program
         res, _ = toolchain.link_program(resources, build_path, name)
 
+        resources.detect_duplicates()
+
         if report != None:
             end = time()
             cur_result["elapsed_time"] = end - start

tools/toolchains/__init__.py

@@ -120,6 +120,29 @@ class Resources:
 
         return self
 
+    def detect_duplicates(self):
+        dupe_dict = dict()
+        for filename in self.s_sources + self.c_sources + self.cpp_sources:
+            objname, _ = splitext(basename(filename))
+            dupe_dict.setdefault(objname, [])
+            dupe_dict[objname].append(filename)
+        for objname, filenames in dupe_dict.iteritems():
+            if len(filenames) > 1:
+                print "[ERROR] Object file %s.o is not unique!"\
+                    " It could be made from:" % objname
+                print columnate(filenames)
+        dupe_headers = dict()
+        for filename in self.headers:
+            headername = basename(filename)
+            dupe_headers.setdefault(headername, [])
+            dupe_headers[headername].append(headername)
+        for headername, locations in dupe_headers.iteritems():
+            if len(filenames) > 1:
+                print "[ERROR] Header file %s is not unique! It could be:" %\
+                    headername
+                print columnate(locations)
+
+
     def relative_to(self, base, dot=False):
         for field in ['inc_dirs', 'headers', 's_sources', 'c_sources',
                       'cpp_sources', 'lib_dirs', 'objects', 'libraries',