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Add a dedicated iree_c_module CMake module (iree-org#5214)
Instead of using `iree_bytecode_module` to generate a C module, this adds a dedicated `iree_c_module` CMake module.
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# Copyright 2021 Google LLC | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# https://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
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include(CMakeParseArguments) | ||
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# iree_c_module() | ||
# | ||
# Parameters: | ||
# NAME: Name of target (see Note). | ||
# SRC: MLIR source file to compile into a c module. | ||
# H_FILE_OUTPUT: The H header file to output. | ||
# TRANSLATE_TOOL: Translation tool to invoke (CMake target). The default | ||
# tool is "iree-translate". | ||
# FLAGS: Flags to pass to the translation tool (list of strings). The | ||
# default flag set is "-iree-vm-ir-to-c-module". | ||
# TESTONLY: When added, this target will only be built if user passes | ||
# -DIREE_BUILD_TESTS=ON to CMake. | ||
# | ||
# Note: | ||
# By default, iree_c_module will create a library named ${NAME}, | ||
# and alias target iree::${NAME}. The iree:: form should always be used. | ||
# This is to reduce namespace pollution. | ||
function(iree_c_module) | ||
cmake_parse_arguments( | ||
_RULE | ||
"TESTONLY" | ||
"NAME;SRC;H_FILE_OUTPUT;TRANSLATE_TOOL" | ||
"FLAGS" | ||
${ARGN} | ||
) | ||
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if(_RULE_TESTONLY AND NOT IREE_BUILD_TESTS) | ||
return() | ||
endif() | ||
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# Replace dependencies passed by ::name with iree::package::name | ||
iree_package_ns(_PACKAGE_NS) | ||
list(TRANSFORM _RULE_DEPS REPLACE "^::" "${_PACKAGE_NS}::") | ||
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# Prefix the library with the package name, so we get: iree_package_name. | ||
iree_package_name(_PACKAGE_NAME) | ||
set(_NAME "${_PACKAGE_NAME}_${_RULE_NAME}") | ||
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# Set defaults for FLAGS and TRANSLATE_TOOL | ||
if(DEFINED _RULE_FLAGS) | ||
set(_FLAGS ${_RULE_FLAGS}) | ||
else() | ||
set(_FLAGS "-iree-vm-ir-to-c-module") | ||
endif() | ||
if(DEFINED _RULE_TRANSLATE_TOOL) | ||
set(_TRANSLATE_TOOL ${_RULE_TRANSLATE_TOOL}) | ||
else() | ||
set(_TRANSLATE_TOOL "iree-translate") | ||
endif() | ||
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iree_get_executable_path(_TRANSLATE_TOOL_EXECUTABLE ${_TRANSLATE_TOOL}) | ||
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set(_ARGS "${_FLAGS}") | ||
list(APPEND _ARGS "${CMAKE_CURRENT_SOURCE_DIR}/${_RULE_SRC}") | ||
list(APPEND _ARGS "-o") | ||
list(APPEND _ARGS "${_RULE_H_FILE_OUTPUT}") | ||
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add_custom_command( | ||
OUTPUT "${_RULE_H_FILE_OUTPUT}" | ||
COMMAND ${_TRANSLATE_TOOL_EXECUTABLE} ${_ARGS} | ||
# Changes to either the translation tool or the input source should | ||
# trigger rebuilding. | ||
DEPENDS ${_TRANSLATE_TOOL_EXECUTABLE} ${_RULE_SRC} | ||
) | ||
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set(_GEN_TARGET "${_NAME}_gen") | ||
add_custom_target( | ||
${_GEN_TARGET} | ||
DEPENDS | ||
${_RULE_H_FILE_OUTPUT} | ||
) | ||
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add_library(${_NAME} INTERFACE) | ||
add_dependencies(${_NAME} ${_GEN_TARGET}) | ||
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# Alias the iree_package_name library to iree::package::name. | ||
# This lets us more clearly map to Bazel and makes it possible to | ||
# disambiguate the underscores in paths vs. the separators. | ||
add_library(${_PACKAGE_NS}::${_RULE_NAME} ALIAS ${_NAME}) | ||
iree_package_dir(_PACKAGE_DIR) | ||
if(${_RULE_NAME} STREQUAL ${_PACKAGE_DIR}) | ||
# If the library name matches the package then treat it as a default. | ||
# For example, foo/bar/ library 'bar' would end up as 'foo::bar'. | ||
add_library(${_PACKAGE_NS} ALIAS ${_NAME}) | ||
endif() | ||
endfunction() |
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