How to update the project build date and time in the bin file header without make clean and full build.

[MichaelS]

I need the header block in the .bin file which contains the version number, build date and build time to update. As I have said a few times it does not update unless I do a "clean build". This header record at the start of the BIN file is referenced by my OTA code as part of the update management.

Yes I could touch the relevant source code, if I new which source files created the binary file header record. THIS IS MY QUESTION. This is part of the IDF software, not my source.

I don't know how much clearer I can describe this.