[gcc r10-9715] libstdc++: Fix declarations of memalign etc. for freestanding [PR 97570]

[Jonathan Wakely]

https://gcc.gnu.org/g:67e95b6908b842e437089e867e5eed6dbbe264f2

commit r10-9715-g67e95b6908b842e437089e867e5eed6dbbe264f2
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Oct 26 12:02:50 2020 +0000

    libstdc++: Fix declarations of memalign etc. for freestanding [PR 97570]
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/97570
            * libsupc++/new_opa.cc: Declare size_t in global namespace.
            Remove unused header.
    
    (cherry picked from commit 93e9a7bcd5434a24c945de33cd7fa01a25f68418)

Diff:
---
 libstdc++-v3/libsupc++/new_opa.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/libsupc++/new_opa.cc b/libstdc++-v3/libsupc++/new_opa.cc
index b935936e19a..732fe827cda 100644
--- a/libstdc++-v3/libsupc++/new_opa.cc
+++ b/libstdc++-v3/libsupc++/new_opa.cc
@@ -26,7 +26,6 @@
 #include <bits/c++config.h>
 #include <stdlib.h>
 #include <stdint.h>
-#include <bits/exception_defines.h>
 #include <bit>
 #include "new"
 
@@ -44,6 +43,7 @@ using std::new_handler;
 using std::bad_alloc;
 
 #if ! _GLIBCXX_HOSTED
+using std::size_t;
 extern "C"
 {
 # if _GLIBCXX_HAVE_ALIGNED_ALLOC