- Issue #10309: Define _GNU_SOURCE so that mremap() gets the proper

  signature.  Without this, architectures where sizeof void* != sizeof int are
  broken.  Patch given by Hallvard B Furuseth.

diff --cc Misc/NEWS
index c0cda4f59449c06e7cef9db62844a45448a54d81,25a51a69fb0b99666dd55cd3b56f66f863f4ca37..d7d9ef2366924c879311810518b9c6dc11cbcdb9
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -14,10 -14,8 +14,10 @@@ Core and Builtin
    format string that contains positional fields. Initial patch by
    Julian Berman.
  
- - Issue #11627: Fix segfault when __new__ on a exception returns a non-exception
-   class.
 +- Issue #10271: Allow warnings.showwarning() be any callable.
 +
+ - Issue #11627: Fix segfault when __new__ on a exception returns a
+   non-exception class.
  
  - Issue #12149: Update the method cache after a type's dictionnary gets
    cleared by the garbage collector.  This fixes a segfault when an instance
@@@ -1040,8 -713,6 +1040,12 @@@ Tools/Demo
  Extension Modules
  -----------------
  
++- Issue #10309: Define _GNU_SOURCE so that mremap() gets the proper
++  signature.  Without this, architectures where sizeof void* != sizeof int are
++  broken.  Patch given by Hallvard B Furuseth.
++
 +- Issue #12221: Replace pyexpat.__version__ with the Python version.
 +
  - Issue #12051: Fix segfault in json.dumps() while encoding highly-nested
    objects using the C accelerations.