Add support for DATA in CMake.
Roughly trying to mimic Bazel's behavior: https://docs.bazel.build/versions/master/build-ref.html#data. There are some differences that may require some iteration to get right.
I'm planning on using this soon for a Vulkan layer (a .so and .json file will be built/generated, and I want them accessible to `iree-run-mlir` and other binaries).
Closes https://github.com/google/iree/pull/992
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/iree/pull/992 from ScottTodd:cmake-data 444e6d6e05caf1d241aa7da0e37df09df71831ab
PiperOrigin-RevId: 299881053
diff --git a/build_tools/cmake/iree_macros.cmake b/build_tools/cmake/iree_macros.cmake
index 683460a..4929146 100644
--- a/build_tools/cmake/iree_macros.cmake
+++ b/build_tools/cmake/iree_macros.cmake
@@ -123,3 +123,49 @@
endif()
set(${OPTS} ${_OPTS} PARENT_SCOPE)
endfunction()
+
+#-------------------------------------------------------------------------------
+# Data dependencies
+#-------------------------------------------------------------------------------
+
+# Adds 'data' dependencies to a target.
+#
+# Parameters:
+# NAME: name of the target to add data dependencies to
+# DATA: List of targets and/or files in the source tree. Files should use the
+# same format as targets (i.e. iree::package::subpackage::file.txt)
+function(iree_add_data_dependencies)
+ cmake_parse_arguments(
+ _RULE
+ ""
+ "NAME"
+ "DATA"
+ ${ARGN}
+ )
+
+ if(NOT _RULE_DATA)
+ return()
+ endif()
+
+ foreach(_DATA_LABEL ${_RULE_DATA})
+ if(TARGET ${_DATA_LABEL})
+ add_dependencies(${_RULE_NAME} ${_DATA_LABEL})
+ else()
+ # Not a target, assume to be a file instead.
+ string(REPLACE "::" "/" _FILE_PATH ${_DATA_LABEL})
+
+ # Create a target which copies the data file into the build directory.
+ # If this file is included in multiple rules, only create the target once.
+ string(REPLACE "::" "_" _DATA_TARGET ${_DATA_LABEL})
+ if(NOT TARGET ${_DATA_TARGET})
+ set(_INPUT_PATH "${CMAKE_SOURCE_DIR}/${_FILE_PATH}")
+ set(_OUTPUT_PATH "${CMAKE_BINARY_DIR}/${_FILE_PATH}")
+ add_custom_target(${_DATA_TARGET}
+ COMMAND ${CMAKE_COMMAND} -E copy ${_INPUT_PATH} ${_OUTPUT_PATH}
+ )
+ endif()
+
+ add_dependencies(${_RULE_NAME} ${_DATA_TARGET})
+ endif()
+ endforeach()
+endfunction()
