[Bug other/79341] Many Asan tests fail on s390

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79341

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #9)

Perhaps say:

      AC_TRY_COMPILE([#include <sys/syscall.h>],[
        syscall (__NR_gettid);
        syscall (__NR_futex);
        syscall (__NR_exit_group);
+#if (defined(__s390__) || defined(__s390x__)) && !__GLIBC_PREREQ (2, 19)
+#error Too old glibc
+#endif
      ], [sanitizer_supported=yes])