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cmake: reconfigure when .config changes #20085

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cmake: reconfigure when .config changes #20085

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9 changes: 9 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -413,6 +413,15 @@ if(NOT EXISTS ${NUTTX_BINARY_DIR}/.config OR NOT "${NUTTX_DEFCONFIG}" STREQUAL
message(STATUS " Appdir: ${NUTTX_APPS_DIR}")
endif()

# config.h and CONFIG_* are generated at configure time. Watch .config so an
# out-of-band edit (kconfig-tweak) reruns CMake instead of leaving a stale
# header. .config is only rewritten when missing or the defconfig path changes,
# so this does not loop.
set_property(
DIRECTORY
APPEND
PROPERTY CMAKE_CONFIGURE_DEPENDS ${NUTTX_BINARY_DIR}/.config)

# declare global custom targets at very beginning `nuttx_global` is used to hold
# global target properties to solve that cmake GLOBAL property can not use
# generator expression this is needed to make sure added before project() create
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