Do not include system call wrappers in libc for old FreeBSD system calls.

[jhb]

Summary

Do not include system call wrappers in libc for old FreeBSD system calls.

The base system libc is only used to run binaries built on FreeBSD 7.0 and
later. It does not need to include system call wrappers for system calls
only used by FreeBSD binaries built on versions older than 7.0. This was
already true for "COMPAT" system calls, but now wrappers for system calls
used on FreeBSD 4 and 6 are excluded as well.

Test Plan

• Still need to do a tinderbox build.

[kib]

From what I see, the compat{,4,6} syscalls were not exported from libc. Am I right ?

I am fine with the patch, assuming that the generated files would be regenerated in separate commit.

[jhb]

In D5597#119463, @kib wrote:

From what I see, the compat{,4,6} syscalls were not exported from libc. Am I right ?

I am fine with the patch, assuming that the generated files would be regenerated in separate commit.

They were not exported from libc.so. They do show up as valid symbols in libc.a, but all symbols do.