Build against OpenWrt 18.06 (32-bit time ABI) for wider binary compatibility. OpenWrt releases ≤21 and ≥22 are ABI incompatible due to Musl time64 transition https://musl.libc.org/time64.html.
- Most OpenWrt builds should be forward compatible with 18.06 and later releases, except:
arm_cortex-a7added in 21.02;arm_cortex-a7_vfpv4added in 22.03;riscv64added in 23.05. - Static builds are compatible with Asuswrt Merlin and other legacy distros with CONFIG_ADVISE_SYSCALLS disabled. The lack of CONFIG_ADVISE_SYSCALLS results in worse memory management performance, so use regular OpenWrt builds if possible.