# The cxx.bnf grammar file
set(cxx_bnf ${CMAKE_CURRENT_SOURCE_DIR}/../lib/cxx/cxx.bnf)

setup_host_tool(clang-pseudo-gen CLANG_PSEUDO_GEN pseudo_gen pseudo_gen_target)

# Generate inc files.
set(cxx_symbols_inc ${CMAKE_CURRENT_BINARY_DIR}/CXXSymbols.inc)
add_custom_command(OUTPUT ${cxx_symbols_inc}
   COMMAND "${pseudo_gen}"
     --grammar ${cxx_bnf}
     --emit-symbol-list
     -o ${cxx_symbols_inc}
   COMMENT "Generating nonterminal symbol file for cxx grammar..."
   DEPENDS ${pseudo_gen_target} ${cxx_bnf}
   VERBATIM)

set(cxx_bnf_inc ${CMAKE_CURRENT_BINARY_DIR}/CXXBNF.inc)
add_custom_command(OUTPUT ${cxx_bnf_inc}
   COMMAND "${pseudo_gen}"
     --grammar ${cxx_bnf}
     --emit-grammar-content
     -o ${cxx_bnf_inc}
   COMMENT "Generating bnf string file for cxx grammar..."
   DEPENDS ${pseudo_gen_target} ${cxx_bnf}
   VERBATIM)

# add_custom_command does not create a new target, we need to deine a target
# explicitly, so that other targets can depend on it.
add_custom_target(cxx_gen
    DEPENDS ${cxx_symbols_inc} ${cxx_bnf_inc}
    VERBATIM)