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# Code from: https://cmake.org/pipermail/cmake/2009-March/027892.html
MACRO(COPY_FILE_IF_CHANGED in_file out_file target)
IF(${in_file} IS_NEWER_THAN ${out_file})
# message("COpying file: ${in_file} to: ${out_file}")
ADD_CUSTOM_COMMAND (
TARGET ${target}
POST_BUILD
COMMAND ${CMAKE_COMMAND}
ARGS -E copy ${in_file} ${out_file}
)
ENDIF(${in_file} IS_NEWER_THAN ${out_file})
ENDMACRO(COPY_FILE_IF_CHANGED)
MACRO(COPY_FILE_INTO_DIRECTORY_IF_CHANGED in_file out_dir target)
GET_FILENAME_COMPONENT(file_name ${in_file} NAME)
COPY_FILE_IF_CHANGED(${in_file} ${out_dir}/${file_name}
${target})
ENDMACRO(COPY_FILE_INTO_DIRECTORY_IF_CHANGED)
#Copies all the files from in_file_list into the out_dir.
# sub-trees are ignored (files are stored in same out_dir)
MACRO(COPY_FILES_INTO_DIRECTORY_IF_CHANGED in_file_list out_dir target)
FOREACH(in_file ${in_file_list})
COPY_FILE_INTO_DIRECTORY_IF_CHANGED(${in_file}
${out_dir} ${target})
ENDFOREACH(in_file)
ENDMACRO(COPY_FILES_INTO_DIRECTORY_IF_CHANGED)
#Copy all files and directories in in_dir to out_dir.
# Subtrees remain intact.
MACRO(COPY_DIRECTORY_IF_CHANGED in_dir out_dir target)
#message("Copying directory ${in_dir}")
FILE(GLOB_RECURSE in_file_list ${in_dir}/*)
FOREACH(in_file ${in_file_list})
if(NOT ${in_file} MATCHES ".*/CVS.*")
STRING(REGEX REPLACE ${in_dir} ${out_dir} out_file
${in_file})
COPY_FILE_IF_CHANGED(${in_file} ${out_file} ${target})
endif(NOT ${in_file} MATCHES ".*/CVS.*")
ENDFOREACH(in_file)
ENDMACRO(COPY_DIRECTORY_IF_CHANGED)
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