Remove obsolete, never-implemented XSI STREAMS declarations

The stub implementations are turned into compat symbols.

Linux actually has two reserved system call numbers (for getpmsg
and putpmsg), but these system calls have never been implemented,
and there are no plans to implement them, so this patch replaces
the wrappers with the generic stubs.

According to <https://bugzilla.redhat.com/show_bug.cgi?id=436349>,
the presence of the XSI STREAMS declarations is a minor portability
hazard because they are not actually implemented.

This commit does not change the TIRPC support code in
sunrpc/rpc_svcout.c.  It uses additional XTI functionality and
therefore never worked with glibc.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/posix/Versions b/posix/Versions
index ad693ae9a7..7d06a6d0c0 100644
--- a/posix/Versions
+++ b/posix/Versions
@@ -80,6 +80,10 @@ libc {
     # w*
     waitid; wordexp; wordfree;
   }
+  GLIBC_2.1 {
+    # Compat symbols for the obsolete, unimplemented XSI streams extension.
+    fattach; fdetach; getmsg; getpmsg; isastream; putmsg; putpmsg;
+  }
   GLIBC_2.1.2 {
     # functions used in other libraries
     __vfork;
@@ -141,6 +145,8 @@ libc {
     posix_spawn_file_actions_addchdir_np;
     posix_spawn_file_actions_addfchdir_np;
   }
+  GLIBC_2.30 {
+  }
   GLIBC_PRIVATE {
     __libc_fork; __libc_pread; __libc_pwrite;
     __nanosleep_nocancel; __pause_nocancel;