Add config option that allows for weak mocked functions

docs/CMock_Summary.md

@@ -287,6 +287,9 @@ Defined in the yaml file, they look more like this:
 * `:mock_suffix`:
   The suffix to append to your mock files. Defaults to “”.
 
+* `:weak_mocks`:
+  When set to true, the generated mocks are defined as weak symbols. Defaults to false.
+
 * `:subdir`:
   Relative subdir for your mocks.  Set this to e.g. "sys" in order to
   create mock for `sys/types.h` in `:mock_path`/sys/

lib/cmock_config.rb

@@ -12,6 +12,7 @@ class CMockConfig
     :mock_path                   => 'mocks',
     :mock_prefix                 => 'Mock',
     :mock_suffix                 => '',
+    :weak_mocks                  => false,
     :subdir                      => nil,
     :plugins                     => [],
     :strippables                 => ['(?:__attribute__\s*\(+.*?\)+)'],

lib/cmock_generator.rb

@@ -6,7 +6,7 @@
 
 class CMockGenerator
 
-  attr_accessor :config, :file_writer, :module_name, :clean_mock_name, :mock_name, :utils, :plugins, :ordered
+  attr_accessor :config, :file_writer, :module_name, :clean_mock_name, :mock_name, :utils, :plugins, :weak, :ordered
 
   def initialize(config, file_writer, utils, plugins)
     @file_writer = file_writer
@@ -15,6 +15,7 @@ class CMockGenerator
     @config      = config
     @prefix      = @config.mock_prefix
     @suffix      = @config.mock_suffix
+    @weak        = @config.weak_mocks
     @ordered     = @config.enforce_strict_ordering
     @framework   = @config.framework.to_s
 
@@ -206,6 +207,9 @@ class CMockGenerator
     args_string += (", " + function[:var_arg]) unless (function[:var_arg].nil?)
 
     # Create mock function
+    if (@weak)
+        file << "#{function_mod_and_rettype} #{function[:name]}(#{args_string}) __attribute ((weak));\n"
+    end
     file << "#{function_mod_and_rettype} #{function[:name]}(#{args_string})\n"
     file << "{\n"
     file << "  UNITY_LINE_TYPE cmock_line = TEST_LINE_NUM;\n"

test/unit/cmock_generator_main_test.rb

@@ -44,6 +44,7 @@ describe CMockGenerator, "Verify CMockGenerator Module" do
     #no strict handling
     @config.expect :mock_prefix, "Mock"
     @config.expect :mock_suffix, ""
+    @config.expect :weak_mocks, false
     @config.expect :enforce_strict_ordering, nil
     @config.expect :framework, :unity
     @config.expect :includes, ["ConfigRequiredHeader1.h","ConfigRequiredHeader2.h"]
@@ -60,6 +61,7 @@ describe CMockGenerator, "Verify CMockGenerator Module" do
     #strict handling
     @config.expect :mock_prefix, "Mock"
     @config.expect :mock_suffix, ""
+    @config.expect :weak_mocks, false
     @config.expect :enforce_strict_ordering, true
     @config.expect :framework, :unity
     @config.expect :includes, nil
@@ -80,6 +82,7 @@ describe CMockGenerator, "Verify CMockGenerator Module" do
   it "create the top of a header file with optional include files from config and include file from plugin" do
     @config.expect :mock_prefix, "Mock"
     @config.expect :mock_suffix, ""
+    @config.expect :weak_mocks, false
     orig_filename = "PoutPoutFish.h"
     define_name = "MOCKPOUTPOUTFISH_H"
     mock_name = "MockPoutPoutFish"
@@ -116,6 +119,7 @@ describe CMockGenerator, "Verify CMockGenerator Module" do
     #no strict handling
     @config.expect :mock_prefix, "Mock"
     @config.expect :mock_suffix, ""
+    @config.expect :weak_mocks, false
     @config.expect :enforce_strict_ordering, nil
     @config.expect :framework, :unity
     @config.expect :includes, ["ConfigRequiredHeader1.h","ConfigRequiredHeader2.h"]
@@ -130,6 +134,7 @@ describe CMockGenerator, "Verify CMockGenerator Module" do
 
     @config.expect :mock_prefix, "Mock"
     @config.expect :mock_suffix, ""
+    @config.expect :weak_mocks, false
     orig_filename = "Pout-Pout Fish.h"
     define_name = "MOCKPOUT_POUT_FISH_H"
     mock_name = "MockPout_Pout_Fish"
@@ -165,6 +170,7 @@ describe CMockGenerator, "Verify CMockGenerator Module" do
   it "create the top of a header file with optional include files from config" do
     @config.expect :mock_prefix, "Mock"
     @config.expect :mock_suffix, ""
+    @config.expect :weak_mocks, false
     orig_filename = "PoutPoutFish.h"
     define_name = "MOCKPOUTPOUTFISH_H"
     mock_name = "MockPoutPoutFish"
@@ -199,6 +205,7 @@ describe CMockGenerator, "Verify CMockGenerator Module" do
   it "create the top of a header file with include file from plugin" do
     @config.expect :mock_prefix, "Mock"
     @config.expect :mock_suffix, ""
+    @config.expect :weak_mocks, false
     orig_filename = "PoutPoutFish.h"
     define_name = "MOCKPOUTPOUTFISH_H"
     mock_name = "MockPoutPoutFish"