From 2962171a1c664f6e648cea6129a821572c6f2ba6 Mon Sep 17 00:00:00 2001
From: Scot Breitenfeld <brtnfld@hdfgroup.org>
Date: Wed, 17 Jun 2015 11:52:14 -0500
Subject: [svn-r27227] restricted __float128 to gnu compilers

---
 configure.ac | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 0279d3c..8ea73eb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -362,12 +362,14 @@ AC_CHECK_SIZEOF([long double], [8])
 
 ## Check for __FLOAT128 extension
 AC_CHECK_SIZEOF([__float128])
+AC_CHECK_SIZEOF([_Quad])
 HAVE_FLOAT128=0
 HAVE_QUADMATH=0
 AC_CHECK_HEADERS([quadmath.h], [HAVE_QUADMATH=1], [])
 PAC_LDBL_DIG
 
-## __float seems to work for __float128, but it should be _Quad type instead
+## __float128 seems to work intel compilers, but it should be _Quad type instead
+
 if test "$ac_cv_sizeof___float128" != 0 && test "$cc_vendor" = "gcc"; then
 ## Check if __float128 and c_long_double are the same size and precision
   dnl if test "$ac_cv_sizeof___float128" = "$ac_cv_sizeof_long_double"; then
-- 
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