> For now, one possibility to preserve the timestamps of the files is to
> replace that cmake -E copy_directory command
> with a combination of the
> cmake -E tar cf ....
> cmake -E tar xf ....
Even easier than that would be to create the tarball you want, and then just
pass it as the URL to ExternalProject_Add, either from a url on the internet,
or a reference to a tarball in your source tree.
ExternalProject totally knows how to transform a .tar/.tar.gz file into a
source directory...
You could also try simply using the directory in-place as the original if you
specify:
DOWNLOAD_COMMAND “”
SOURCE_DIR “original directory”
instead of URL.
Always take the simplest approach that requires no changes to existing CMake if
it’s possible (and not completely unreasonable...) 😊
HTH,
David
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