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# The cxx.bnf grammar file
set(cxx_bnf ${CMAKE_CURRENT_SOURCE_DIR}/../lib/cxx/cxx.bnf)
set(CLANG_PSEUDO_GEN "clang-pseudo-gen" CACHE
STRING "Host clang-pseudo-gen executable. Saves building if cross-compiling.")
if(NOT CLANG_PSEUDO_GEN STREQUAL "clang-pseudo-gen")
set(pseudo_gen ${CLANG_PSEUDO_GEN})
set(pseudo_gen_target ${CLANG_PSEUDO_GEN})
elseif(LLVM_USE_HOST_TOOLS)
# The NATIVE executable *must* depend on the current target, otherwise the
# native one won't get rebuilt when the pseudo-gen sources change.
build_native_tool(clang-pseudo-gen pseudo_gen DEPENDS clang-pseudo-gen)
set(pseudo_gen_target "${pseudo_gen}")
else()
set(pseudo_gen $<TARGET_FILE:clang-pseudo-gen>)
set(pseudo_gen_target clang-pseudo-gen)
endif()
# 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)
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