syslog-ng: /usr/lib/libssl.so: file not recognized: file format not recognized

latest archlinux / openwrt / packages:
edit: works with debian 11. so what's the difference?

ket-dest.lo modules/afsocket/libafsocket_la-socket-options.lo modules/afsocket/libafsocket_la-transport-mapper.lo modules/afsocket/libafsocket_la-afinet.lo modules/afsocket/libafsocket_la-afinet-source.lo modules/afsocket/libafsocket_la-afinet-dest.lo modules/afsocket/libafsocket_la-afinet-dest-failover.lo modules/afsocket/libafsocket_la-socket-options-inet.lo modules/afsocket/libafsocket_la-socket-options-unix.lo modules/afsocket/libafsocket_la-transport-mapper-inet.lo modules/afsocket/libafsocket_la-afunix-source.lo modules/afsocket/libafsocket_la-afunix-dest.lo modules/afsocket/libafsocket_la-transport-mapper-unix.lo modules/afsocket/libafsocket_la-transport-unix-socket.lo modules/afsocket/libafsocket_la-compat-unix-creds.lo modules/afsocket/libafsocket_la-afsocket-grammar.lo modules/afsocket/libafsocket_la-afsocket-parser.lo modules/afsocket/libafsocket_la-afsocket-plugin.lo modules/afsocket/libafsocket_la-systemd-syslog-source.lo ./lib/libsyslog-ng.la -L/mnt/zeus/hdd/sources/openwrt/sources/snapshot_fb7530/staging_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/usr/lib -lssl -lcrypto -inst-prefix-dir /mnt/zeus/hdd/sources/openwrt/sources/snapshot_fb7530/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/syslog-ng-3.38.1/ipkg-install)
/usr/lib/libssl.so: file not recognized: file format not recognized
collect2: error: ld returned 1 exit status
libtool:   error: error: relink 'modules/afsocket/libafsocket.la' with the above command before installing it
make[6]: *** [Makefile:11159: install-moduleLTLIBRARIES] Error 1
make[5]: *** [Makefile:26764: install-am] Error 2
make[4]: *** [Makefile:24985: install-recursive] Error 1
make[3]: *** [Makefile:26757: install] Error 2
make[3]: Leaving directory '/mnt/zeus/hdd/sources/openwrt/sources/snapshot_fb7530/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/syslog-ng-3.38.1'
make[2]: *** [Makefile:162: /mnt/zeus/hdd/sources/openwrt/sources/snapshot_fb7530/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/syslog-ng-3.38.1/.built] Error 2
make[2]: Leaving directory '/mnt/zeus/hdd/sources/openwrt/sources/snapshot_fb7530/feeds/packages/admin/syslog-ng'
time: package/feeds/packages/syslog-ng/compile#3.55#1.26#4.36
    ERROR: package/feeds/packages/syslog-ng failed to build.
make[1]: *** [package/Makefile:116: package/feeds/packages/syslog-ng/compile] Error 1
make[1]: Leaving directory '/mnt/zeus/hdd/sources/openwrt/sources/snapshot_fb7530'
make: *** [/mnt/zeus/hdd/sources/openwrt/sources/snapshot_fb7530/include/toplevel.mk:231: package/feeds/packages/syslog-ng/compile] Error 2

Start in feeds/packages/admin/syslog-ng and inspect the generated Makefile around the install-moduleLTLIBRARIES failure and the linker command shown in the report. Reproduce the OpenWrt build, compare the referenced libssl.so with the working Debian 11 environment, and consider the issue complete when syslog-ng builds and installs without the file-format linker error.