[PATCH] powerpc: Fix the compiler mode used with C++ when -mabi=ieeelongdouble

[Tulio Magno Quites Machado Filho]

When compiling C++  code with -mabi=ieeelongdouble, KCtype is
unavailable and TCtype should be used instead.

2018-04-27  Tulio Magno Quites Machado Filho  <tuliom@linux.ibm.com>

	* sysdeps/powerpc/bits/floatn.h [__HAVE_FLOAT128
	&& (!__GNUC_PREREQ (7, 0) || defined __cplusplus)
	&& __LDBL_MANT_DIG__ == 113] (__cfloat128): Use compiler mode __TC__.

Signed-off-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
---
 sysdeps/powerpc/bits/floatn.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sysdeps/powerpc/bits/floatn.h b/sysdeps/powerpc/bits/floatn.h
index c3834096e3..9ba1b81380 100644
--- a/sysdeps/powerpc/bits/floatn.h
+++ b/sysdeps/powerpc/bits/floatn.h
@@ -66,10 +66,14 @@
 
 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
 # if __HAVE_FLOAT128
+/* Add a typedef for older GCC and C++ compilers which don't natively support
+   _Complex _Float128..  */
 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-/* Add a typedef for older GCC compilers which don't natively support
-   _Complex _Float128.  */
+#   if __LDBL_MANT_DIG__ == 113
+typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__)));
+#   else
 typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__KC__)));
+#   endif
 #   define __CFLOAT128 __cfloat128
 #  else
 #   define __CFLOAT128 _Complex _Float128
-- 
2.14.3