Has anyone managed to make this work/build it?

[BorgoBoy]

I just can't

[nikit6000]

Modify the source code for your purposes and then:

make -j1 os=linux CC="$(TARGET_CC)" ST="echo" -C "./mDNSResponder/mDNSPosix"
install -D -m 644 "./mDNSResponder/mDNSPosix/build/prod/libdns_sd.so" "$(TARGET_DIR)/usr/lib/libdns_sd.so"
install -D -m 644 "./mDNSResponder/mDNSShared/dns_sd.h" "$(TARGET_DIR)/usr/include/dns_sd.h"
make -j1 os=linux CC="$(TARGET_CC) -I$(TARGET_DIR)/usr/include -L$(TARGET_DIR)/usr/lib" STRIP="echo" -C "./source/PlatformPOSIX"

$(TARGET_DIR) - path to your target's sysroot
$(TARGET_CC) - path to the gcc for cross compilation