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# Parse all .cpp sources of a given `target`, and for each comment like: | ||
# //! JS_PRELOAD_FILE <name> | ||
# it will append a link flag like: | ||
# --preload-file <name> | ||
# Only if building for Emscripten. It has no effects otherwise. | ||
# | ||
# 07/March/2022, Jose Luis Blanco Claraco | ||
# | ||
function(process_emscripten_embedded_files targetName_) | ||
if (NOT "${CMAKE_SYSTEM_NAME}" STREQUAL "Emscripten") | ||
return() | ||
endif() | ||
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get_target_property(targetCWD ${targetName_} BINARY_DIR) | ||
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get_target_property(MY_SOURCES ${targetName_} SOURCES) | ||
foreach(fil_ ${MY_SOURCES}) | ||
#message(STATUS "Processing: ${fil_}") | ||
file(STRINGS "${fil_}" content_) | ||
string(REGEX MATCHALL "//! JS_PRELOAD_FILE.+\\|([-A-Za-z0-9_\\./]+)\\|" myMatches_ "${content_}") | ||
foreach(match_ ${myMatches_}) | ||
message(STATUS "match_ 1: ${match_}") | ||
string(REGEX REPLACE "<(.+)>" "\\1" f_ "${match_}") | ||
message(STATUS "f: ${f_}") | ||
if (NOT f_) | ||
continue() | ||
endif() | ||
message(STATUS "[emscripten] Embedding file '${f_}' into '${targetName_}'") | ||
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if(NOT COMMAND target_link_options) | ||
message("Warning: This feature requires target_link_options() [cmake >=3.13]") | ||
return() | ||
endif() | ||
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set(absPath ${MRPT_SOURCE_DIR}/${f_}) | ||
set(relativePath ${f_}) | ||
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# Create copies (symlinks dont work...) to access the files via relative paths: | ||
execute_process(COMMAND bash -c "mkdir -p \$(dirname ${relativePath})" WORKING_DIRECTORY ${targetCWD}) | ||
execute_process(COMMAND bash -c "cp ${absPath} ${relativePath}" WORKING_DIRECTORY ${targetCWD}) | ||
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target_link_options(${targetName_} PRIVATE --preload-file ${relativePath}) | ||
endforeach() | ||
endforeach() | ||
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# Make the .data file accessible to the emscripten linker: | ||
execute_process(COMMAND bash -c "ln -s ${EXECUTABLE_OUTPUT_PATH}/${targetName_}.data ${targetCWD}/${targetName_}.data" OUTPUT_QUIET ERROR_QUIET) | ||
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endfunction() |
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