rsync, símbolos não resolvidos, mas bibliotecas encontradas

Question

Em um sistema embarcado, não consigo executar o rsync:

$ rsync 
/usr/bin/rsync: symbol 'poptHelpOptions': can't resolve symbol
/usr/bin/rsync: symbol '_poptBitsN': can't resolve symbol
/usr/bin/rsync: symbol '_poptArgMask': can't resolve symbol
/usr/bin/rsync: symbol '_poptBitsK': can't resolve symbol
/usr/bin/rsync: symbol '_poptBitsM': can't resolve symbol
/usr/bin/rsync: symbol 'poptAliasOptions': can't resolve symbol
/usr/bin/rsync: symbol 'poptHelpOptionsI18N': can't resolve symbol

mas parece que as dependências são encontradas:

$ ldd /usr/bin/rsync 
    libz.so.1 => /usr/lib/libz.so.1 (0x76f36000)
    libpopt.so.0 => /usr/lib/libpopt.so.0 (0x76f1b000)
    libc.so.1 => /lib/libc.so.1 (0x76ea2000)
    libc.so.6 => /usr/lib/libc.so.6 (0x76d61000)
    ld-linux-armhf.so.3 => /lib/ld-linux-armhf.so.3 (0x76d30000)
    ld-uClibc.so.1 => /lib/ld-uClibc.so.0 (0x76f57000)

Existe algo mais que levaria a esses erros? Este é um ambiente Buildroot (kernel 4.4.8-v7) no armv7l.