Only add ARDUINO=100 if it is not otherwise defined.

Author: James Foster

SampleProjects/TestSomething/.arduino-ci.yml

@@ -1,3 +1,26 @@
+platforms:
+
+  uno:
+    board: arduino:avr:uno
+    package: arduino:avr
+    gcc:
+      features:
+      defines:
+        - __AVR_ATmega328P__
+        - ARDUINO=10813
+      warnings:
+      flags:
+  due:
+    board: arduino:sam:arduino_due_x
+    package: arduino:sam
+    gcc:
+      features:
+      defines:
+        - __AVR_ATmega328__
+        - ARDUINO=10813
+      warnings:
+      flags:
+
 unittest:
   exclude_dirs:
     - excludeThis

lib/arduino_ci/cpp_library.rb

@@ -324,7 +324,7 @@ def build_for_test_with_configuration(test_file, aux_libraries, gcc_binary, ci_g
       executable = Pathname.new("unittest_#{base}.bin").expand_path
       File.delete(executable) if File.exist?(executable)
       arg_sets = []
-      arg_sets << ["-std=c++0x", "-o", executable.to_s, "-DARDUINO=10813"]
+      arg_sets << ["-std=c++0x", "-o", executable.to_s]
       if libasan?(gcc_binary)
         arg_sets << [ # Stuff to help with dynamic memory mishandling
           "-g", "-O1",
@@ -334,6 +334,9 @@ def build_for_test_with_configuration(test_file, aux_libraries, gcc_binary, ci_g
         ]
       end
       arg_sets << test_args(aux_libraries, ci_gcc_config)
+      if (arg_sets.flatten(1).index{|s| s.include?("-DARDUINO=")} == nil) 
+        arg_sets << ["-DARDUINO=100"]
+      end
       arg_sets << cpp_files_libraries(aux_libraries).map(&:to_s)
       arg_sets << [test_file.to_s]
       args = arg_sets.flatten(1)