Summary: boehm-gc: add support for aarch64 ILP32

* include/private/gcconfig.h [AARCH64] (ALIGNMENT, CPP_WORDSZ):
Define for __ILP32__.

From-SVN: r234255

boehm-gc/ChangeLog

+2016-03-16  Andreas Schwab  <schwab@suse.de>
+
+	* include/private/gcconfig.h [AARCH64] (ALIGNMENT, CPP_WORDSZ):
+	Define for __ILP32__.
+
 2015-10-09  David Malcolm  <dmalcolm@redhat.com>
 
 	* testsuite/lib/boehm-gc.exp: Load multiline.exp before

boehm-gc/include/private/gcconfig.h

@@ -1854,9 +1854,14 @@
 # endif
 
 # ifdef AARCH64
-#   define CPP_WORDSZ 64
+#   ifdef __ILP32__
+#     define ALIGNMENT 4
+#     define CPP_WORDSZ 32
+#   else
+#     define ALIGNMENT 8
+#     define CPP_WORDSZ 64
+#   endif
 #   define MACH_TYPE "AARCH64"
-#   define ALIGNMENT 8
 #   ifndef HBLKSIZE
 #     define HBLKSIZE 4096
 #   endif