Thanks you for fast reply. Can I rebuild glibc build root image ? (Pico Max + nand image ) Because My compiler (FPC : Free Pascal Compiler ) thread model support pthread & glibc only. I try build image with glibc option. but fail to build. my test ------------------------------------------------...

./buildroot.sh buildrootconfig -> include minicom -> build image ok (exists minicom in result image ) -> tool chain -> external toolchaing c lib (glibc) -> (fail / not found in /usr/lib ) How to include libpthread.so in /usr/lib/libpthread.so ? Which buildrootconfig option is including libpthread.so...