re PR target/26459 (gcc fails to build on powerpc e500-double targets)

	PR target/26459
	* config/rs6000/e500-double.h (SUB3TARGET_OVERRIDE_OPTIONS): Test
	rs6000_explicit_options.float_gprs.

From-SVN: r112843

gcc/ChangeLog

+2006-04-11  Mark Mitchell  <mark@codesourcery.com>
+
+	PR target/26459
+	* config/rs6000/e500-double.h (SUB3TARGET_OVERRIDE_OPTIONS): Test
+	rs6000_explicit_options.float_gprs.
+
 2006-04-10  Roger Sayle  <roger@eyesopen.com>
 
 	* config/i386/i386.c (ix86_expand_vector_init_one_nonzero): Renamed

gcc/config/rs6000/e500-double.h

 /* Target definitions for E500 with double precision FP.
-   Copyright (C) 2004 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2006 Free Software Foundation, Inc.
    Contributed by Aldy Hernandez (aldyh@redhat.com).
 
    This file is part of GCC.
@@ -21,5 +21,5 @@
 
 #undef  SUB3TARGET_OVERRIDE_OPTIONS
 #define SUB3TARGET_OVERRIDE_OPTIONS \
-  if (rs6000_float_gprs_string == NULL) \
+  if (!rs6000_explicit_options.float_gprs) \
     rs6000_float_gprs = 2;