[glibc] misc: Turn sstk into a compat symbol

[glibc] misc: Turn sstk into a compat symbol

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9cc93ba0973ad04ee26c515a1552afb85e73c6ba

commit 9cc93ba0973ad04ee26c515a1552afb85e73c6ba
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon Apr 27 12:04:23 2020 +0200

    misc: Turn sstk into a compat symbol
    
    It is not implemented anywhere.  There is an osf_sstk system call on
    alpha, but it is not used to implement sstk, and the system call
    is not implemented on Linux, either.

Diff:
---
 misc/sstk.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/misc/sstk.c b/misc/sstk.c
index ad2010b5dd..0a2a967917 100644
--- a/misc/sstk.c
+++ b/misc/sstk.c
@@ -16,17 +16,14 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <errno.h>
+#include <shlib-compat.h>
 
-/* Increase the size of the stack by INCREMENT,
-   and return the address of the bottom of the stack.  */
-
-void *sstk (int increment) __THROW;
-
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_32)
 void *
 sstk (int increment)
 {
   __set_errno (ENOSYS);
   return (void *) -1;
 }
-
-stub_warning (sstk)
+compat_symbol (libc, sstk, sstk, GLIBC_2_0);
+#endif