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752818f090
The cmakev2 path snapshots SDKCONFIG_DEFAULTS once during early init. Build system v1 apps that mutate SDKCONFIG_DEFAULTS after `include(project.cmake)` but before `project()` (e.g. `list(PREPEND SDKCONFIG_DEFAULTS ...)` to inject tools/test_apps/configs/sdkconfig.debug_helpers) miss those mutations when the shim drives the cmakev2 path, because the snapshot was taken before the mutation. Re-resolve SDKCONFIG_DEFAULTS at sdkconfig-generation time when __V1_COMPAT_SHIM is active so the late-mutated value is honored. Native cmakev2 apps still use the property-based contract via idf_build_set_property(SDKCONFIG_DEFAULTS ... APPEND).