[gcc r13-1744] RTEMS: Remove HAVE_POLL for libstdc++

[Sebastian Huber]

https://gcc.gnu.org/g:f082bc79c104aa308cd4acca5bf3adffd46da355

commit r13-1744-gf082bc79c104aa308cd4acca5bf3adffd46da355
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date:   Tue Jul 19 14:08:32 2022 +0200

    RTEMS: Remove HAVE_POLL for libstdc++
    
    The poll() function is not always available in RTEMS.
    
    libstdc++-v3/ChangeLog:
    
            * configure: Regnerate.
            * configure.ac (newlib, *-rtems*): Remove HAVE_POLL.

Diff:
---
 libstdc++-v3/configure    | 2 --
 libstdc++-v3/configure.ac | 1 -
 2 files changed, 3 deletions(-)

diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 19ca3368784..9e2ee865481 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -29254,8 +29254,6 @@ else
 
         $as_echo "#define HAVE_LINK 1" >>confdefs.h
 
-        $as_echo "#define HAVE_POLL 1" >>confdefs.h
-
         $as_echo "#define HAVE_QUICK_EXIT 1" >>confdefs.h
 
         $as_echo "#define HAVE_READLINK 1" >>confdefs.h
diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index 79512a398c2..b351622bf46 100644
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -366,7 +366,6 @@ else
         AC_DEFINE(HAVE_ALIGNED_ALLOC)
         AC_DEFINE(HAVE_AT_QUICK_EXIT)
         AC_DEFINE(HAVE_LINK)
-        AC_DEFINE(HAVE_POLL)
         AC_DEFINE(HAVE_QUICK_EXIT)
         AC_DEFINE(HAVE_READLINK)
         AC_DEFINE(HAVE_SETENV)