I've committed the attached patch.

2013-03-27  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>

	* config/s390/s390.h (TARGET_FLT_EVAL_METHOD): Define.

---
 gcc/config/s390/s390.h |    5 +++++
 1 file changed, 5 insertions(+)

Index: gcc/config/s390/s390.h
===================================================================
*** gcc/config/s390/s390.h.orig
--- gcc/config/s390/s390.h
*************** enum processor_flags
*** 164,169 ****
--- 164,174 ----
  #define S390_TDC_INFINITY (S390_TDC_POSITIVE_INFINITY \
  			  | S390_TDC_NEGATIVE_INFINITY )
  
+ /* This is used by float.h to define the float_t and double_t data
+    types.  For historical reasons both are double on s390 what cannot
+    be changed anymore.  */
+ #define TARGET_FLT_EVAL_METHOD 1
+ 
  /* Target machine storage layout.  */
  
  /* Everything is big-endian.  */

From-SVN: r197154