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CMake: Add comment about ICU data files

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Robert Schulze 2024-09-11 13:05:24 +00:00
parent 22f389d415
commit 9e335abe17
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5
contrib/icu-cmake/CMakeLists.txt
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@ -481,6 +481,11 @@ if (ARCH_S390X)
else() else()
set(ICUDATA_SOURCE_FILE "${ICUDATA_SOURCE_DIR}/icudt75l_dat.S" ) set(ICUDATA_SOURCE_FILE "${ICUDATA_SOURCE_DIR}/icudt75l_dat.S" )
endif() endif()
# ^^ you might be confused how for different little endian platforms (x86, ARM) the same assembly files can be used.
# These files are indeed assembly but they only contain data ('.long' directive), which makes them portable accross CPUs.
# Only the endianness and the character set (ASCII, EBCDIC) makes a difference, also see
# https://unicode-org.github.io/icu/userguide/icu_data/#sharing-icu-data-between-platforms, 'Sharing ICU Data Between Platforms')
# (and as an experiment, try re-generating the data files on x86 vs. ARM, ... you'll get exactly the same files)
set(ICUDATA_SOURCES set(ICUDATA_SOURCES
"${ICUDATA_SOURCE_FILE}" "${ICUDATA_SOURCE_FILE}"