Add extra version information to avrdude output

[ndim]

Some downstream projects build avrdude and want to add their own version information to the avrdude version.

This adds a clean way to do that without patching for both cmake and automake based builds:

cmake -DEXTRA_VERSION:STRING=-arduino.1-rc1
../configure EXTRA_VERSION=-arduino.1-rc1

After building avrdude, the last line of "avrdude -?" will now look similar to the following, depending on whether you are building an avrdude git checkout or an avrdude release:

avrdude version 8.0-20240901-arduino.1-rc1 (30e19f23), https://github.com/avrdudes/avrdude
avrdude version 8.1-arduino.1-rc1 (30e19f23), https://github.com/avrdudes/avrdude

[ndim]

This came up in arduino/avrdude-packing#31

[ndim]

EXTRA_VERSION might not be the best name for this. It just came to mind without me thinking much.

Better names welcome.

[mcuee]

I think EXTRA_VERSION is not bad.

Maybe CUSTOM_VERSION is another option.

@MCUdude

Which one do you prefer?

Other than the name, this PR should be good to go.

[MCUdude]

@mcuee I'm fine with either. Another alternative is VERSION_SUFFIX, which will be -arduino.1 in this case

[mcuee]

@mcuee I'm fine with either. Another alternative is VERSION_SUFFIX, which will be -arduino.1 in this case

I like your proposal better.

@ndim
How about you?

[mcuee]

@MCUdude

@umbynos has released Arduino flavor of avrdude 7.3 and avrdude 8.0. You may want to try it on your macOS machine. I will try it as well on my machines later this week.
https://github.com/arduino/avrdude-packing/releases

@umbynos
Thanks a lot for the efforts.

[ndim]

Given EXTRA_VERSION and VERSION_SUFFIX, I would actually favour EXTRA_VERSION_SUFFIX.

That is a bit longer, but its three parts say all there is to know, making its name explain itself:

• EXTRA Optional extra information (not mandatory)...
• VERSION ...for the program version...
• SUFFIX ...added as a suffix.

[ndim]

It should also be mentioned here that even though #1698 will always show git information like hash, branch , and tag (if built from git checkout) in its new --version output, none of that information will be part of the shorter version string as shown at the end of avrdude -?.

So this PR will not be obsoleted by #1698.

[mcuee]

Given EXTRA_VERSION and VERSION_SUFFIX, I would actually favour EXTRA_VERSION_SUFFIX.

That is a bit longer, but its three parts say all there is to know, making its name explain itself:

• EXTRA Optional extra information (not mandatory)...
• VERSION ...for the program version...
• SUFFIX ...added as a suffix.

I am fine with this proposal.

[ndim]

I have changed the name to EXTRA_VERSION_SUFFIX. I think this is ready to be merged.