--- gcc/config.gcc.orig
+++ gcc/config.gcc
@@ -2982,7 +2982,10 @@
 	tmake_file="rs6000/t-fprules rs6000/t-ppcos ${tmake_file} rs6000/t-ppccomm"
 	case ${target} in
 	    powerpc*le-*-*)
-		tm_file="${tm_file} rs6000/sysv4le.h" ;;
+		tm_file="${tm_file} rs6000/sysv4le.h"
+		if test x$with_long_double_format = xieee; then
+		    tm_defines="${tm_defines} RS6000_DEFAULT_LONG_DOUBLE_SIZE=128 TARGET_IEEEQUAD_DEFAULT=1 TARGET_FLOAT128_ENABLE_TYPE=1"
+		fi ;;
 	esac
 	case ${target} in
 	     powerpc64*)