Merge branch 'master' into fix-clang-analizer-warnings

* master:
  update add_confict document; ref #2391
  Update document by regenerating it.
  Add :doc task to run document generator.
  Add document for `add_conflict` and `add_conflicts`.

Rakefile

@@ -123,3 +123,8 @@ task :deep_clean => ["clean"] do
   end
   puts "Cleaned up mrbgems build folder"
 end
+
+desc 'generate document'
+task :doc do
+  load "#{MRUBY_ROOT}/doc/language/generator.rb"
+end

doc/language/Core.md

@@ -1328,6 +1328,12 @@ ISO Code | Source File | C Function
 --- | --- | ---
 15.3.1.2.5 | src/kernel.c | mrb_f_block_given_p_m
 
+#### local_variables
+
+ISO Code | Source File | C Function
+--- | --- | ---
+15.3.1.2.7 | src/kernel.c | mrb_local_variables
+
 #### raise
 
 ISO Code | Source File | C Function
@@ -1498,6 +1504,12 @@ ISO Code | Source File | C Function
 --- | --- | ---
 15.3.1.3.26 | src/kernel.c | mrb_obj_is_kind_of_m
 
+#### local_variables
+
+ISO Code | Source File | C Function
+--- | --- | ---
+15.3.1.3.28 | src/kernel.c | mrb_local_variables
+
 #### methods
 
 ISO Code | Source File | C Function

doc/mrbgems/README.md

@@ -161,6 +161,22 @@ Its format is same as argument of method `MRuby::Build#gem`, expect that it can'
 When a special version of depedency is required,
 use `MRuby::Build#gem` in *build_config.rb* to override default gem.
 
+If you have conflicting GEMs use either or both of the following methods
+* `spec.add_conflict(gem, *requirements)`
+    * The `requirements` argument is same as in `add_dependency` method.
+
+like following code:
+
+	MRuby::Gem::Specification.new 'some-regexp-binding' do |spec|
+	  spec.license = 'BSD'
+	  spec.author = 'John Doe'
+
+	  spec.add_conflict 'mruby-onig-regexp', '> 0.0.0'
+	  spec.add_conflict 'mruby-hs-regexp'
+	  spec.add_conflict 'mruby-pcre-regexp'
+	  spec.add_conflict 'mruby-regexp-pcre'
+	end
+
 In case your GEM has more complex build requirements you can use
 the following options additionally inside of your GEM specification: