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-rw-r--r--ChangeLog4
-rw-r--r--math/tgmath.h2
2 files changed, 5 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index ac692dc9e7..0fe7eafe99 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2016-08-03  Joseph Myers  <joseph@codesourcery.com>
 
+	* math/tgmath.h (nextdown): Define if
+	[__GLIBC_USE (IEC_60559_BFP_EXT)], not if [__USE_GNU].
+	(nextup): Likewise.
+
 	* bits/libc-header-start.h (__GLIBC_USE_IEC_60559_FUNCS_EXT): New
 	macro.
 	* include/features.h (__STDC_WANT_IEC_60559_FUNCS_EXT__):
diff --git a/math/tgmath.h b/math/tgmath.h
index 8916fbe39c..de1eb985fe 100644
--- a/math/tgmath.h
+++ b/math/tgmath.h
@@ -392,7 +392,7 @@
    prevailing rounding mode.  */
 #define rint(Val) __TGMATH_UNARY_REAL_ONLY (Val, rint)
 
-#ifdef __USE_GNU
+#if __GLIBC_USE (IEC_60559_BFP_EXT)
 /* Return X - epsilon.  */
 # define nextdown(Val) __TGMATH_UNARY_REAL_ONLY (Val, nextdown)
 /* Return X + epsilon.  */