From 2ff87f3f18788876bcabd439a0158272c7db0c0d Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Thu, 22 Mar 2012 08:28:39 -0700
Subject: Add sysdeps/x86_64/preconfigure

---
 sysdeps/x86_64/preconfigure.in | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 sysdeps/x86_64/preconfigure.in

(limited to 'sysdeps/x86_64/preconfigure.in')

diff --git a/sysdeps/x86_64/preconfigure.in b/sysdeps/x86_64/preconfigure.in
new file mode 100644
index 0000000000..1f049c7a04
--- /dev/null
+++ b/sysdeps/x86_64/preconfigure.in
@@ -0,0 +1,20 @@
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+# Local preconfigure fragment for sysdeps/x86_64
+
+test -n "$base_machine" || case "$machine" in
+x86_64)
+  base_machine=x86_64
+  # Check if we are building for x32.
+  AC_CACHE_CHECK(whether $CC compiles in -mx32 mode by default,
+		 libc_cv_x32, [dnl
+  AC_TRY_COMPILE(dnl
+[#ifdef __LP64__
+# error not x32
+#endif], [], libc_cv_x32=yes, libc_cv_x32=no)])
+  if test $libc_cv_x32 = yes; then
+    machine=x86_64/x32
+  else
+    machine=x86_64/64
+  fi
+  ;;
+esac
-- 
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