generate an OpenCL C built-in functions dictionary (#1228)

* generate an OpenCL C built-in functions dictionary

* switch command line argument to specify input file to -i

Makefile

@@ -514,10 +514,12 @@ $(MANHTMLDIR)/intro.html: $(REFPATH)/intro.txt $(MANCOPYRIGHT)
 REGISTRY = $(ROOTDIR)/xml
 APIXML = $(REGISTRY)/cl.xml
 CFEATURES = c/features.txt
+CFUNCTIONS = c/functions.txt
 GENSCRIPT = $(SCRIPTS)/gencl.py
 DICTSCRIPT = $(SCRIPTS)/gen_dictionaries.py
 VERSIONSCRIPT = $(SCRIPTS)/gen_version_notes.py
-CFEATSCRIPT = $(SCRIPTS)/gen_c_feature_dictionary.py
+CFEATSCRIPT = $(SCRIPTS)/gen_dictionary_from_file.py
+CFUNCSCRIPT = $(SCRIPTS)/gen_dictionary_from_file.py
 GENSCRIPTOPTS = $(VERSIONOPTIONS) $(EXTOPTIONS) $(GENSCRIPTEXTRA) -registry $(APIXML)
 GENSCRIPTEXTRA =
 
@@ -543,7 +545,8 @@ extinc: $(METADEPEND)
 $(METADEPEND): $(APIXML) $(GENSCRIPT)
  $(QUIET)$(MKDIR) $(METAPATH)
  $(QUIET)$(PYTHON) $(GENSCRIPT) $(GENSCRIPTOPTS) -o $(METAPATH) extinc
- $(QUIET)$(PYTHON) $(CFEATSCRIPT) -features $(CFEATURES) -o $(METAPATH)/c-feature-dictionary.asciidoc
+ $(QUIET)$(PYTHON) $(CFEATSCRIPT) -i $(CFEATURES) -o $(METAPATH)/c-feature-dictionary.asciidoc
+ $(QUIET)$(PYTHON) $(CFUNCSCRIPT) -i $(CFUNCTIONS) -o $(METAPATH)/c-function-dictionary.asciidoc
 
 # This generates a single file containing asciidoc attributes for each
 # extension in the spec being built.