[gcc/devel/ranger] Patch ieee128-lib-patch006b

[Aldy Hernandez]

https://gcc.gnu.org/g:bee774cecb3f3872f858e078f6def770b3d3c2f1

commit bee774cecb3f3872f858e078f6def770b3d3c2f1
Author: Michael Meissner <Michael Meissner meissner@linux.ibm.com>
Date:   Tue May 5 13:35:09 2020 -0400

    Patch ieee128-lib-patch006b

Diff:
---
 gcc/testsuite/ChangeLog.meissner   |  6 ++++++
 gcc/testsuite/gcc.dg/nextafter-2.c | 10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/gcc/testsuite/ChangeLog.meissner b/gcc/testsuite/ChangeLog.meissner
index 98683f43554..054ab3f5c6f 100644
--- a/gcc/testsuite/ChangeLog.meissner
+++ b/gcc/testsuite/ChangeLog.meissner
@@ -1,3 +1,9 @@
+2020-05-05  Michael Meissner  <meissner@linux.ibm.com>
+
+	(ieee128-lib-patch006b)
+	* gcc.dg/nextafter-2.c: Add support for long double being IEEE
+	128-bit on PowerPC systems.
+
 2020-05-05   Michael Meissner  <meissner@linux.ibm.com>
 
 	Clone branch
diff --git a/gcc/testsuite/gcc.dg/nextafter-2.c b/gcc/testsuite/gcc.dg/nextafter-2.c
index e51ae94be0c..64e9e3c485f 100644
--- a/gcc/testsuite/gcc.dg/nextafter-2.c
+++ b/gcc/testsuite/gcc.dg/nextafter-2.c
@@ -13,4 +13,14 @@
 #  define NO_LONG_DOUBLE 1
 # endif
 #endif
+
+#if defined(_ARCH_PPC) && defined(__LONG_DOUBLE_IEEE128__)
+/* On PowerPC systems, long double uses either the IBM long double format, or
+   IEEE 128-bit format.  The compiler switches the long double built-in
+   function names and glibc switches the names when math.h is included.
+   Because this test is run with -fno-builtin, include math.h so that the
+   appropriate nextafter functions are called.  */
+#include <math.h>
+#endif
+
 #include "nextafter-1.c"