local compilation is not incremental

[rusefillc]

under WSL

git clone --recurse-submodules https://github.com/rusefi/fw-custom-example

cd /home/rusefi/fw-custom-example
./compile_firmware.sh
./compile_firmware.sh

expected: second compilation does not really compile everything
actual result: second compilation compiles everything :(

[rusefillc]

@chuckwagoncomputing any chance you could help with diagnostics of root causes of the issue, if the issue reproduces for you with latest of this repo?

FYI recent progress #14 rusefi/rusefi#6879 was to generate much more of files not into submodule folders but into local generated e42639d

While this gave clarity of what is changed - at least all headers are now local to this custom repo - it did not help with incremental compilation like I was hoping it would

[esaulenka]

looks like make always tries recompile everyting due to recreation of these auto-generated files

     Prerequisite '../../../connectors/generated_outputs.h' is newer than target 'pch/pch.h.gch/firmware'.
     Prerequisite '../../../connectors/generated_ts_name_by_pin.cpp' is newer than target 'pch/pch.h.gch/firmware'.

and next, for these files

     Prerequisite '.config-sentinel' is newer than target '../../../connectors/generated_outputs.h'.
     Prerequisite '.docsenums-sentinel' is older than target '../../../connectors/generated_outputs.h'.
    Must remake target '../../../connectors/generated_outputs.h'.

and... what is it?! what is the 'signature_XYZ' ?

       Finished prerequisites of target file '.config-sentinel'.
       Prerequisite '../../../generated/tunerstudio/generated/signature_XYZ.txt' of target '.config-sentinel' does not exist.
       Prerequisite 'controllers/algo/rusefi_hw_stm32_enums.h' is older than target '.config-sentinel'.
       Prerequisite 'controllers/algo/rusefi_hw_adc_enums.h' is older than target '.config-sentinel'.
...
       Prerequisite '.target-sentinel' is older than target '.config-sentinel'.
      Must remake target '.config-sentinel'.

[rusefillc]

--- a/firmware/bin/compile.sh
+++ b/firmware/bin/compile.sh

-make $B -j$(nproc) -r $MAKE_ARGS
+# make $B -j$(nproc) -r $MAKE_ARGS
+make -d $B -r $MAKE_ARGS

[rusefillc]

Looks fixed thank you @esaulenka

[esaulenka]

make -d $B -r $MAKE_ARGS

to clarify: this one can be used to debugging Makefiles.
It produses huge logs (~15MB in this case), but you can find there the whole sequence, which file depends on which one.