[flang][NFC] Create required Source dir for flang-doc. (#134000)
diff --git a/flang/docs/CMakeLists.txt b/flang/docs/CMakeLists.txt
index 3e4883e..774fa4c7 100644
--- a/flang/docs/CMakeLists.txt
+++ b/flang/docs/CMakeLists.txt
@@ -100,6 +100,15 @@
list(APPEND LLVM_TABLEGEN_FLAGS "-I${CMAKE_CURRENT_SOURCE_DIR}/../../clang/include/clang/Driver/")
clang_tablegen(Source/${output_file} ${td_option} SOURCE ${source} TARGET "gen-${output_file}")
add_dependencies(${docs_target} "gen-${output_file}")
+
+ # clang_tablegen() does not create the output directory automatically,
+ # so we have to create it explicitly. Note that copy-flang-src-docs below
+ # does create the output directory, but it is not necessarily run
+ # before RST generation.
+ add_custom_target(create-flang-rst-output-dir
+ COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/Source
+ )
+ add_dependencies("gen-${output_file}" create-flang-rst-output-dir)
endfunction()
if (LLVM_ENABLE_SPHINX)