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cmake: dts: Use temporary file for dts.cmake #81340

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cmake: dts: Use temporary file for dts.cmake #81340

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11 changes: 10 additions & 1 deletion cmake/modules/dts.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -349,17 +349,26 @@ endif()
#
# Run GEN_DTS_CMAKE_SCRIPT.
#
# A temporary file is copied to the original file if it differs. This prevents issue such as a
# cycle when sysbuild is used of configuring and building multiple times due to the dts.cmake file
# of images having a newer modification time than the sysbuild build.ninja file, despite the
# output having not changed
#
set(dts_cmake_tmp ${DTS_CMAKE}.new)

execute_process(
COMMAND ${PYTHON_EXECUTABLE} ${GEN_DTS_CMAKE_SCRIPT}
--edt-pickle ${EDT_PICKLE}
--cmake-out ${DTS_CMAKE}
--cmake-out ${dts_cmake_tmp}
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
RESULT_VARIABLE ret
)
if(NOT "${ret}" STREQUAL "0")
message(FATAL_ERROR "gen_dts_cmake.py failed with return code: ${ret}")
else()
zephyr_file_copy(${dts_cmake_tmp} ${DTS_CMAKE} ONLY_IF_DIFFERENT)
file(REMOVE ${dts_cmake_tmp})
set(dts_cmake_tmp)
message(STATUS "Including generated dts.cmake file: ${DTS_CMAKE}")
include(${DTS_CMAKE})
endif()
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