Snippets for gambit-c 4.9.8 from FreeBSD 150arm64

Sourced from https://pkg-status.freebsd.org/ampere5/data/latest-per-pkg/gambit-c/4.9.8,1/150arm64-default.log.

• _num.c:87001:12: warning: expression result unused [-Wunused-value]
  

• os_thread.c:627:5: warning: call to undeclared function 'pthread_setaffinity_np'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    627 |     pthread_setaffinity_np (pthread_self (),
        |     ^
  

• os_thread.c:678:5: warning: call to undeclared function 'pthread_setaffinity_np'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    678 |     pthread_setaffinity_np (pthread_self (),
        |     ^