How can I cross compile odhcp6c?

[bahtsiz_bedevi]

I want to compile odhcp6c package in VM (Linux Mint Debian Edition) for my router NBG7815. But the package's readme doesn't explain how to cross compile it.

** Compiling **

odhcp6c uses cmake:
* To prepare a Makefile use:  "cmake ."
* To build / install use: "make" / "make install" afterwards.
* To build DEB or RPM packages use: "make package" afterwards.

I assume that odhcp6c executable created by this guide won't work on my router's SoC architecture. How can I cross compile it?

{
        "kernel": "6.6.73",
        "hostname": "router-sinan",
        "system": "ARMv8 Processor rev 4",
        "model": "Zyxel NBG7815",
        "board_name": "zyxel,nbg7815",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "NBG7815-24.10.0-NSS",
                "revision": "r28427+144-6df0e3d02a-ff321885c3",
                "target": "qualcommax/ipq807x",
                "description": "OpenWrt NBG7815-24.10.0-NSS r28427+144-6df0e3d02a-ff321885c3",
                "builddate": "1738624177"
        }
}

[slh]

Like everything else, either as part if a full build or using the SDK.

[bahtsiz_bedevi]

I thought I could compile a single package, can't I?
If so, I forked odhcp6c and merged PR-93 https://github.com/sinancetinkaya/odhcp6c
How can I replace the original odhcp6c with the merged one in OpenWRT clone folder?

[slh]

You can, but only if you build it properly within (and against) your target, e.g. by using the SDK.

[bahtsiz_bedevi]

I'm sorry but a vague answer without an example, guide doesn't help.

[bahtsiz_bedevi]

With the help of ChatGPT, added How to cross compile odhcp6c for OpenWRT in Linux with IPv6 fix merged https://github.com/sinancetinkaya/odhcp6c

[_bernd]

Thank you for the gist because today I also wondered about what I need to do to compile just a package. Thx.