125 lines
4.6 KiB
CMake
125 lines
4.6 KiB
CMake
# Copyright 2021 The Draco Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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if(DRACO_CMAKE_DRACO_HELPERS_CMAKE_)
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return()
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endif() # DRACO_CMAKE_DRACO_HELPERS_CMAKE_
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set(DRACO_CMAKE_DRACO_HELPERS_CMAKE_ 1)
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# Kills build generation using message(FATAL_ERROR) and outputs all data passed
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# to the console via use of $ARGN.
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macro(draco_die)
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message(FATAL_ERROR ${ARGN})
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endmacro()
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# Converts semi-colon delimited list variable(s) to string. Output is written to
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# variable supplied via the DEST parameter. Input is from an expanded variable
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# referenced by SOURCE and/or variable(s) referenced by SOURCE_VARS.
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macro(draco_set_and_stringify)
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set(optional_args)
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set(single_value_args DEST SOURCE_VAR)
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set(multi_value_args SOURCE SOURCE_VARS)
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cmake_parse_arguments(sas "${optional_args}" "${single_value_args}"
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"${multi_value_args}" ${ARGN})
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if(NOT sas_DEST OR NOT (sas_SOURCE OR sas_SOURCE_VARS))
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draco_die("draco_set_and_stringify: DEST and at least one of SOURCE "
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"SOURCE_VARS required.")
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endif()
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unset(${sas_DEST})
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if(sas_SOURCE)
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# $sas_SOURCE is one or more expanded variables, just copy the values to
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# $sas_DEST.
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set(${sas_DEST} "${sas_SOURCE}")
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endif()
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if(sas_SOURCE_VARS)
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# $sas_SOURCE_VARS is one or more variable names. Each iteration expands a
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# variable and appends it to $sas_DEST.
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foreach(source_var ${sas_SOURCE_VARS})
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set(${sas_DEST} "${${sas_DEST}} ${${source_var}}")
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endforeach()
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# Because $sas_DEST can be empty when entering this scope leading whitespace
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# can be introduced to $sas_DEST on the first iteration of the above loop.
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# Remove it:
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string(STRIP "${${sas_DEST}}" ${sas_DEST})
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endif()
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# Lists in CMake are simply semicolon delimited strings, so stringification is
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# just a find and replace of the semicolon.
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string(REPLACE ";" " " ${sas_DEST} "${${sas_DEST}}")
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if(DRACO_VERBOSE GREATER 1)
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message("draco_set_and_stringify: ${sas_DEST}=${${sas_DEST}}")
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endif()
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endmacro()
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# Creates a dummy source file in $DRACO_GENERATED_SOURCES_DIRECTORY and adds it
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# to the specified target. Optionally adds its path to a list variable.
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#
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# draco_create_dummy_source_file(<TARGET <target> BASENAME <basename of file>>
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# [LISTVAR <list variable>])
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macro(draco_create_dummy_source_file)
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set(optional_args)
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set(single_value_args TARGET BASENAME LISTVAR)
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set(multi_value_args)
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cmake_parse_arguments(cdsf "${optional_args}" "${single_value_args}"
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"${multi_value_args}" ${ARGN})
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if(NOT cdsf_TARGET OR NOT cdsf_BASENAME)
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draco_die("draco_create_dummy_source_file: TARGET and BASENAME required.")
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endif()
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if(NOT DRACO_GENERATED_SOURCES_DIRECTORY)
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set(DRACO_GENERATED_SOURCES_DIRECTORY "${draco_build}/gen_src")
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endif()
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set(dummy_source_dir "${DRACO_GENERATED_SOURCES_DIRECTORY}")
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set(dummy_source_file
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"${dummy_source_dir}/draco_${cdsf_TARGET}_${cdsf_BASENAME}.cc")
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set(dummy_source_code
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"// Generated file. DO NOT EDIT!\n"
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"// C++ source file created for target ${cdsf_TARGET}.\n"
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"void draco_${cdsf_TARGET}_${cdsf_BASENAME}_dummy_function(void)\;\n"
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"void draco_${cdsf_TARGET}_${cdsf_BASENAME}_dummy_function(void) {}\n")
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file(WRITE "${dummy_source_file}" ${dummy_source_code})
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target_sources(${cdsf_TARGET} PRIVATE ${dummy_source_file})
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if(cdsf_LISTVAR)
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list(APPEND ${cdsf_LISTVAR} "${dummy_source_file}")
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endif()
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endmacro()
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# Loads the version string from $draco_source/draco/version.h and sets
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# $DRACO_VERSION.
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macro(draco_load_version_info)
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file(STRINGS "${draco_src_root}/core/draco_version.h" version_file_strings)
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foreach(str ${version_file_strings})
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if(str MATCHES "char kDracoVersion")
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string(FIND "${str}" "\"" open_quote_pos)
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string(FIND "${str}" ";" semicolon_pos)
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math(EXPR open_quote_pos "${open_quote_pos} + 1")
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math(EXPR close_quote_pos "${semicolon_pos} - 1")
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math(EXPR version_string_length "${close_quote_pos} - ${open_quote_pos}")
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string(SUBSTRING "${str}" ${open_quote_pos} ${version_string_length}
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DRACO_VERSION)
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break()
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endif()
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endforeach()
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endmacro()
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